2017-02-23 06:26:44 +08:00
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< title > Faiss: /data/users/matthijs/github_faiss/faiss/utils.cpp Source File< / title >
2017-02-23 06:26:44 +08:00
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2017-03-21 01:33:21 +08:00
< div class = "title" > /data/users/matthijs/github_faiss/faiss/utils.cpp< / div > < / div >
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > /**< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > * Copyright (c) 2015-present, Facebook, Inc.< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > * All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > * This source code is licensed under the CC-by-NC license found in the< / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < span class = "comment" > * LICENSE file in the root directory of this source tree.< / span > < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "comment" > // Copyright 2004-present Facebook. All Rights Reserved< / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "comment" > // -*- c++ -*-< / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "preprocessor" > #include " utils.h" < / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include < cstdio> < / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "preprocessor" > #include < cassert> < / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "preprocessor" > #include < cstring> < / span > < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "preprocessor" > #include < cmath> < / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "preprocessor" > #include < immintrin.h> < / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "preprocessor" > #include < sys/time.h> < / span > < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "preprocessor" > #include < sys/types.h> < / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "preprocessor" > #include < unistd.h> < / span > < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "preprocessor" > #include < omp.h> < / span > < / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < / div >
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< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < / div >
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< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "preprocessor" > #include < algorithm> < / span > < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "preprocessor" > #include < vector> < / span > < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < span class = "preprocessor" > #include " AuxIndexStructures.h" < / span > < / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   < span class = "preprocessor" > #include " FaissAssert.h" < / span > < / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < / div >
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< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < / div >
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< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < / div >
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< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < span class = "preprocessor" > #ifndef FINTEGER< / span > < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < span class = "preprocessor" > < / span > < span class = "preprocessor" > #define FINTEGER long< / span > < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "preprocessor" > < / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < span class = "keyword" > extern< / span > < span class = "stringliteral" > " C" < / span > {< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "comment" > /* declare BLAS functions, see http://www.netlib.org/clapack/cblas/ */< / span > < / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < span class = "keywordtype" > int< / span > sgemm_ (< span class = "keyword" > const< / span > < span class = "keywordtype" > char< / span > *transa, < span class = "keyword" > const< / span > < span class = "keywordtype" > char< / span > *transb, FINTEGER *m, FINTEGER *< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   n, FINTEGER *k, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *alpha, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   FINTEGER *lda, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *b, FINTEGER *< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   ldb, < span class = "keywordtype" > float< / span > *beta, < span class = "keywordtype" > float< / span > *c, FINTEGER *ldc);< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "comment" > /* Lapack functions, see http://www.netlib.org/clapack/old/single/sgeqrf.c */< / span > < / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "keywordtype" > int< / span > sgeqrf_ (FINTEGER *m, FINTEGER *n, < span class = "keywordtype" > float< / span > *a, FINTEGER *lda,< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < span class = "keywordtype" > float< / span > *tau, < span class = "keywordtype" > float< / span > *work, FINTEGER *lwork, FINTEGER *info);< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "keywordtype" > int< / span > sorgqr_(FINTEGER *m, FINTEGER *n, FINTEGER *k, < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   FINTEGER *lda, < span class = "keywordtype" > float< / span > *tau, < span class = "keywordtype" > float< / span > *work,< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   FINTEGER *lwork, FINTEGER *info);< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < / div >
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< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < / div >
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< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   }< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < / div >
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< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < / div >
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< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < span class = "comment" > /**************************************************< / span > < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "comment" > * Get some stats about the system< / span > < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "comment" > **************************************************/< / span > < / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keyword" > namespace < / span > faiss {< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > 70< / a > < / span >   < span class = "keywordtype" > double< / span > < a class = "code" href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > getmillisecs< / a > () {< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < span class = "keyword" > struct < / span > timeval tv;< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   gettimeofday (& tv, < span class = "keyword" > nullptr< / span > );< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < span class = "keywordflow" > return< / span > tv.tv_sec * 1e3 + tv.tv_usec * 1e-3;< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   }< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < / div >
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< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < / div >
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< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < span class = "preprocessor" > #ifdef __linux__< / span > < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "namespacefaiss.html#aa3af5769b0b649f112332a874c64d361" > get_mem_usage_kb< / a > ()< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   {< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "keywordtype" > int< / span > pid = getpid ();< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "keywordtype" > char< / span > fname[256];< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   snprintf (fname, 256, < span class = "stringliteral" > " /proc/%d/status" < / span > , pid);< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   FILE * f = fopen (fname, < span class = "stringliteral" > " r" < / span > );< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   FAISS_THROW_IF_NOT_MSG (f, < span class = "stringliteral" > " cannot open proc status file" < / span > );< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "keywordtype" > size_t< / span > sz = 0;< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordflow" > for< / span > (;;) {< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   < span class = "keywordtype" > char< / span > buf [256];< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "keywordflow" > if< / span > (!fgets (buf, 256, f)) < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "keywordflow" > if< / span > (sscanf (buf, < span class = "stringliteral" > " VmRSS: %ld kB" < / span > , & sz) == 1) < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   }< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   fclose (f);< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "keywordflow" > return< / span > sz;< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   }< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   < / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   < span class = "preprocessor" > #elif __APPLE__< / span > < / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "namespacefaiss.html#aa3af5769b0b649f112332a874c64d361" > get_mem_usage_kb< / a > ()< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   {< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   fprintf(stderr, < span class = "stringliteral" > " WARN: get_mem_usage_kb not implemented on the mac\n" < / span > );< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   }< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   < / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < / div >
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< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   < / div >
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< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   < span class = "comment" > /**************************************************< / span > < / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "comment" > * Random data generation functions< / span > < / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "comment" > **************************************************/< / span > < / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "comment" > < / span > < / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "comment" > /**< / span > < / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < span class = "comment" > * The definition of random functions depends on the architecture:< / span > < / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   < span class = "comment" > * - for Linux, we rely on re-entrant functions (random_r). This< / span > < / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < span class = "comment" > * provides good quality reproducible random sequences.< / span > < / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "comment" > * - for Apple, we use rand_r. Apple is trying so hard to deprecate< / span > < / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < span class = "comment" > * this function that it removed its definition form stdlib.h, so we< / span > < / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < span class = "comment" > * re-declare it below. Fortunately, since it is deprecated, its< / span > < / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "comment" > * prototype should not change much in the forerseeable future.< / span > < / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   < span class = "comment" > * Unfortunately, system designers are more concerned with making the< / span > < / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < span class = "comment" > * most unpredictable random sequences for cryptographic use, when in< / span > < / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < span class = "comment" > * scientific contexts what acutally matters is having reproducible< / span > < / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "comment" > * squences in multi-threaded contexts.< / span > < / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   < / div >
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< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < / div >
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< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < span class = "preprocessor" > #ifdef __linux__< / span > < / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < / div >
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< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < / div >
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< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < / div >
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< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < span class = "keywordtype" > int< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a583f124ecacdbe037ac96e23a44dd420" > RandomGenerator::rand_int< / a > ()< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   {< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   int32_t a;< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   random_r (& rand_data, & a);< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   < span class = "keywordflow" > return< / span > a;< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   }< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   < / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < span class = "keywordtype" > long< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#acbceaa8b017793ca4f8d90e644b0d7f4" > RandomGenerator::rand_long< / a > ()< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   {< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   int32_t a, b;< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   random_r (& rand_data, & a);< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   random_r (& rand_data, & b);< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "keywordflow" > return< / span > long(a) | long(b) < < 31;< / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   }< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < / div >
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< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < / div >
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< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a7633c373153f3b2824d2d99382ba20ab" > RandomGenerator::RandomGenerator< / a > (< span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   {< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   memset (& rand_data, 0, < span class = "keyword" > sizeof< / span > (rand_data));< / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   initstate_r (seed, rand_state, < span class = "keyword" > sizeof< / span > (rand_state), & rand_data);< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   }< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   < / div >
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< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   < / div >
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< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a7633c373153f3b2824d2d99382ba20ab" > RandomGenerator::RandomGenerator< / a > (< span class = "keyword" > const< / span > RandomGenerator & other)< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   {< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   memcpy (rand_state, other.rand_state, < span class = "keyword" > sizeof< / span > (rand_state));< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   rand_data = other.rand_data;< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   setstate_r (rand_state, & rand_data);< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   }< / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   < / div >
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< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < / div >
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< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < span class = "preprocessor" > #elif __APPLE__< / span > < / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   < span class = "keyword" > extern< / span > < span class = "stringliteral" > " C" < / span > {< / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < span class = "keywordtype" > int< / span > rand_r(< span class = "keywordtype" > unsigned< / span > *seed);< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   }< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   < / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a7633c373153f3b2824d2d99382ba20ab" > RandomGenerator::RandomGenerator< / a > (< span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   {< / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   rand_state = seed;< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   }< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < / div >
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< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < / div >
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< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a7633c373153f3b2824d2d99382ba20ab" > RandomGenerator::RandomGenerator< / a > (< span class = "keyword" > const< / span > RandomGenerator & other)< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   {< / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   rand_state = other.rand_state;< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   }< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   < / div >
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< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   < / div >
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< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   < span class = "keywordtype" > int< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a583f124ecacdbe037ac96e23a44dd420" > RandomGenerator::rand_int< / a > ()< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   {< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   < span class = "comment" > // RAND_MAX is 31 bits< / span > < / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   < span class = "comment" > // try to add more randomness in the lower bits< / span > < / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   < span class = "keywordtype" > int< / span > lowbits = rand_r(& rand_state) > > 15;< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < span class = "keywordflow" > return< / span > rand_r(& rand_state) ^ lowbits;< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   }< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   < / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   < span class = "keywordtype" > long< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#acbceaa8b017793ca4f8d90e644b0d7f4" > RandomGenerator::rand_long< / a > ()< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   {< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   < span class = "keywordflow" > return< / span > long(random()) | long(random()) < < 31;< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   }< / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   < / div >
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< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   < / div >
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< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   < / div >
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< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > < a class = "line" href = "structfaiss_1_1RandomGenerator.html#aa460b9bac2593cd1d71305e10ab51af6" > 201< / a > < / span >   < span class = "keywordtype" > int< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a583f124ecacdbe037ac96e23a44dd420" > RandomGenerator::rand_int< / a > (< span class = "keywordtype" > int< / span > max)< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   { < span class = "comment" > // this suffers form non-uniform probabilities when max is not a< / span > < / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < span class = "comment" > // power of 2, but if RAND_MAX > > max the bias is limited.< / span > < / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a583f124ecacdbe037ac96e23a44dd420" > rand_int< / a > () % max;< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   }< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   < / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > < a class = "line" href = "structfaiss_1_1RandomGenerator.html#ac82a433d7bfa56d750907ba5cf74aed7" > 207< / a > < / span >   < span class = "keywordtype" > float< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#ac82a433d7bfa56d750907ba5cf74aed7" > RandomGenerator::rand_float< / a > ()< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   {< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#a583f124ecacdbe037ac96e23a44dd420" > rand_int< / a > () / float(1L < < 31);< / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   }< / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < span class = "keywordtype" > double< / span > RandomGenerator::rand_double ()< / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   {< / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "structfaiss_1_1RandomGenerator.html#acbceaa8b017793ca4f8d90e644b0d7f4" > rand_long< / a > () / double(1L < < 62);< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   }< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   < / div >
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< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   < / div >
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< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   < span class = "comment" > /***********************************************************************< / span > < / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   < span class = "comment" > * Random functions in this C file only exist because Torch< / span > < / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   < span class = "comment" > * counterparts are slow and not multi-threaded. Typical use is for< / span > < / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   < span class = "comment" > * more than 1-100 billion values. */< / span > < / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   < / div >
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< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < / div >
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< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   < span class = "comment" > /* Generate a set of random floating point values such that x[i] in [0,1]< / span > < / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   < span class = "comment" > multi-threading. For this reason, we rely on re-entreant functions. */< / span > < / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < span class = "keywordtype" > void< / span > float_rand (< span class = "keywordtype" > float< / span > * x, < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   {< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   < span class = "comment" > // only try to parallelize on large enough arrays< / span > < / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nblock = n < 1024 ? 1 : 1024;< / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   < / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   RandomGenerator rng0 (seed);< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   < span class = "keywordtype" > int< / span > a0 = rng0.rand_int (), b0 = rng0.rand_int ();< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   < / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < nblock; j++) {< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   < / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   RandomGenerator rng (a0 + j * b0);< / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   < / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > istart = j * n / nblock;< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > iend = (j + 1) * n / nblock;< / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   < / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = istart; i < iend; i++)< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   x[i] = rng.rand_float ();< / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   }< / div >
< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   }< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   < / div >
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< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   < / div >
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< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   < span class = "keywordtype" > void< / span > float_randn (< span class = "keywordtype" > float< / span > * x, < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   {< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   < span class = "comment" > // only try to parallelize on large enough arrays< / span > < / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nblock = n < 1024 ? 1 : 1024;< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   < / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   RandomGenerator rng0 (seed);< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   < span class = "keywordtype" > int< / span > a0 = rng0.rand_int (), b0 = rng0.rand_int ();< / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   < / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < nblock; j++) {< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   RandomGenerator rng (a0 + j * b0);< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   < / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   < span class = "keywordtype" > double< / span > a = 0, b = 0, s = 0;< / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   < span class = "keywordtype" > int< / span > state = 0; < span class = "comment" > /* generate two number per " do-while" loop */< / span > < / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   < / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > istart = j * n / nblock;< / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > iend = (j + 1) * n / nblock;< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   < / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = istart; i < iend; i++) {< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   < span class = "comment" > /* Marsaglia' s method (see Knuth) */< / span > < / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   < span class = "keywordflow" > if< / span > (state == 0) {< / div >
< div class = "line" > < a name = "l00269" > < / a > < span class = "lineno" > 269< / span >   < span class = "keywordflow" > do< / span > {< / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   a = 2.0 * rng.rand_double () - 1;< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   b = 2.0 * rng.rand_double () - 1;< / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   s = a * a + b * b;< / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   } < span class = "keywordflow" > while< / span > (s > = 1.0);< / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   x[i] = a * sqrt(-2.0 * log(s) / s);< / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   }< / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   < span class = "keywordflow" > else< / span > < / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   x[i] = b * sqrt(-2.0 * log(s) / s);< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   state = 1 - state;< / div >
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   }< / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   }< / div >
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   }< / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   < / div >
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< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   < / div >
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< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   < span class = "comment" > /* Integer versions */< / span > < / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   < span class = "keywordtype" > void< / span > long_rand (< span class = "keywordtype" > long< / span > * x, < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   {< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   < span class = "comment" > // only try to parallelize on large enough arrays< / span > < / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nblock = n < 1024 ? 1 : 1024;< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   < / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   RandomGenerator rng0 (seed);< / div >
< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   < span class = "keywordtype" > int< / span > a0 = rng0.rand_int (), b0 = rng0.rand_int ();< / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   < / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < nblock; j++) {< / div >
< div class = "line" > < a name = "l00295" > < / a > < span class = "lineno" > 295< / span >   < / div >
< div class = "line" > < a name = "l00296" > < / a > < span class = "lineno" > 296< / span >   RandomGenerator rng (a0 + j * b0);< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   < / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > istart = j * n / nblock;< / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > iend = (j + 1) * n / nblock;< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = istart; i < iend; i++)< / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   x[i] = rng.rand_long ();< / div >
< div class = "line" > < a name = "l00302" > < / a > < span class = "lineno" > 302< / span >   }< / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   }< / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   < / div >
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< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < / div >
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< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   < / div >
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< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   < span class = "keywordtype" > void< / span > rand_perm (< span class = "keywordtype" > int< / span > *perm, < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   {< / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++) perm[i] = i;< / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   < / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   RandomGenerator rng (seed);< / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   < / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i + 1 < n; i++) {< / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   < span class = "keywordtype" > int< / span > i2 = i + rng.rand_int (n - i);< / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   std::swap(perm[i], perm[i2]);< / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   }< / div >
< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   }< / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   < / div >
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< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   < / div >
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< div class = "line" > < a name = "l00320" > < / a > < span class = "lineno" > 320< / span >   < / div >
< div class = "line" > < a name = "l00321" > < / a > < span class = "lineno" > 321< / span >   < / div >
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< div class = "line" > < a name = "l00322" > < / a > < span class = "lineno" > 322< / span >   < span class = "keywordtype" > void< / span > byte_rand (uint8_t * x, < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l00323" > < / a > < span class = "lineno" > 323< / span >   {< / div >
< div class = "line" > < a name = "l00324" > < / a > < span class = "lineno" > 324< / span >   < span class = "comment" > // only try to parallelize on large enough arrays< / span > < / div >
< div class = "line" > < a name = "l00325" > < / a > < span class = "lineno" > 325< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nblock = n < 1024 ? 1 : 1024;< / div >
< div class = "line" > < a name = "l00326" > < / a > < span class = "lineno" > 326< / span >   < / div >
< div class = "line" > < a name = "l00327" > < / a > < span class = "lineno" > 327< / span >   RandomGenerator rng0 (seed);< / div >
< div class = "line" > < a name = "l00328" > < / a > < span class = "lineno" > 328< / span >   < span class = "keywordtype" > int< / span > a0 = rng0.rand_int (), b0 = rng0.rand_int ();< / div >
< div class = "line" > < a name = "l00329" > < / a > < span class = "lineno" > 329< / span >   < / div >
< div class = "line" > < a name = "l00330" > < / a > < span class = "lineno" > 330< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00331" > < / a > < span class = "lineno" > 331< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < nblock; j++) {< / div >
< div class = "line" > < a name = "l00332" > < / a > < span class = "lineno" > 332< / span >   < / div >
< div class = "line" > < a name = "l00333" > < / a > < span class = "lineno" > 333< / span >   RandomGenerator rng (a0 + j * b0);< / div >
< div class = "line" > < a name = "l00334" > < / a > < span class = "lineno" > 334< / span >   < / div >
< div class = "line" > < a name = "l00335" > < / a > < span class = "lineno" > 335< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > istart = j * n / nblock;< / div >
< div class = "line" > < a name = "l00336" > < / a > < span class = "lineno" > 336< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > iend = (j + 1) * n / nblock;< / div >
< div class = "line" > < a name = "l00337" > < / a > < span class = "lineno" > 337< / span >   < / div >
< div class = "line" > < a name = "l00338" > < / a > < span class = "lineno" > 338< / span >   < span class = "keywordtype" > size_t< / span > i;< / div >
< div class = "line" > < a name = "l00339" > < / a > < span class = "lineno" > 339< / span >   < span class = "keywordflow" > for< / span > (i = istart; i < iend; i++)< / div >
< div class = "line" > < a name = "l00340" > < / a > < span class = "lineno" > 340< / span >   x[i] = rng.rand_long ();< / div >
< div class = "line" > < a name = "l00341" > < / a > < span class = "lineno" > 341< / span >   }< / div >
< div class = "line" > < a name = "l00342" > < / a > < span class = "lineno" > 342< / span >   }< / div >
< div class = "line" > < a name = "l00343" > < / a > < span class = "lineno" > 343< / span >   < / div >
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< div class = "line" > < a name = "l00344" > < / a > < span class = "lineno" > 344< / span >   < / div >
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< div class = "line" > < a name = "l00345" > < / a > < span class = "lineno" > 345< / span >   < / div >
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< div class = "line" > < a name = "l00346" > < / a > < span class = "lineno" > 346< / span >   < span class = "keywordtype" > void< / span > reflection (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * __restrict u,< / div >
< div class = "line" > < a name = "l00347" > < / a > < span class = "lineno" > 347< / span >   < span class = "keywordtype" > float< / span > * __restrict x,< / div >
< div class = "line" > < a name = "l00348" > < / a > < span class = "lineno" > 348< / span >   < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nu)< / div >
< div class = "line" > < a name = "l00349" > < / a > < span class = "lineno" > 349< / span >   {< / div >
< div class = "line" > < a name = "l00350" > < / a > < span class = "lineno" > 350< / span >   < span class = "keywordtype" > size_t< / span > i, j, l;< / div >
< div class = "line" > < a name = "l00351" > < / a > < span class = "lineno" > 351< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < n; i++) {< / div >
< div class = "line" > < a name = "l00352" > < / a > < span class = "lineno" > 352< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * up = u;< / div >
< div class = "line" > < a name = "l00353" > < / a > < span class = "lineno" > 353< / span >   < span class = "keywordflow" > for< / span > (l = 0; l < nu; l++) {< / div >
< div class = "line" > < a name = "l00354" > < / a > < span class = "lineno" > 354< / span >   < span class = "keywordtype" > float< / span > ip1 = 0, ip2 = 0;< / div >
< div class = "line" > < a name = "l00355" > < / a > < span class = "lineno" > 355< / span >   < / div >
< div class = "line" > < a name = "l00356" > < / a > < span class = "lineno" > 356< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < d; j+=2) {< / div >
< div class = "line" > < a name = "l00357" > < / a > < span class = "lineno" > 357< / span >   ip1 += up[j] * x[j];< / div >
< div class = "line" > < a name = "l00358" > < / a > < span class = "lineno" > 358< / span >   ip2 += up[j+1] * x[j+1];< / div >
< div class = "line" > < a name = "l00359" > < / a > < span class = "lineno" > 359< / span >   }< / div >
< div class = "line" > < a name = "l00360" > < / a > < span class = "lineno" > 360< / span >   < span class = "keywordtype" > float< / span > ip = 2 * (ip1 + ip2);< / div >
< div class = "line" > < a name = "l00361" > < / a > < span class = "lineno" > 361< / span >   < / div >
< div class = "line" > < a name = "l00362" > < / a > < span class = "lineno" > 362< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l00363" > < / a > < span class = "lineno" > 363< / span >   x[j] -= ip * up[j];< / div >
< div class = "line" > < a name = "l00364" > < / a > < span class = "lineno" > 364< / span >   up += d;< / div >
< div class = "line" > < a name = "l00365" > < / a > < span class = "lineno" > 365< / span >   }< / div >
< div class = "line" > < a name = "l00366" > < / a > < span class = "lineno" > 366< / span >   x += d;< / div >
< div class = "line" > < a name = "l00367" > < / a > < span class = "lineno" > 367< / span >   }< / div >
< div class = "line" > < a name = "l00368" > < / a > < span class = "lineno" > 368< / span >   }< / div >
< div class = "line" > < a name = "l00369" > < / a > < span class = "lineno" > 369< / span >   < / div >
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< div class = "line" > < a name = "l00370" > < / a > < span class = "lineno" > 370< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00371" > < / a > < span class = "lineno" > 371< / span >   < span class = "comment" > /* Reference implementation (slower) */< / span > < / div >
< div class = "line" > < a name = "l00372" > < / a > < span class = "lineno" > 372< / span >   < span class = "keywordtype" > void< / span > reflection_ref (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * u, < span class = "keywordtype" > float< / span > * x, < span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nu)< / div >
< div class = "line" > < a name = "l00373" > < / a > < span class = "lineno" > 373< / span >   {< / div >
< div class = "line" > < a name = "l00374" > < / a > < span class = "lineno" > 374< / span >   < span class = "keywordtype" > size_t< / span > i, j, l;< / div >
< div class = "line" > < a name = "l00375" > < / a > < span class = "lineno" > 375< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < n; i++) {< / div >
< div class = "line" > < a name = "l00376" > < / a > < span class = "lineno" > 376< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * up = u;< / div >
< div class = "line" > < a name = "l00377" > < / a > < span class = "lineno" > 377< / span >   < span class = "keywordflow" > for< / span > (l = 0; l < nu; l++) {< / div >
< div class = "line" > < a name = "l00378" > < / a > < span class = "lineno" > 378< / span >   < span class = "keywordtype" > double< / span > ip = 0;< / div >
< div class = "line" > < a name = "l00379" > < / a > < span class = "lineno" > 379< / span >   < / div >
< div class = "line" > < a name = "l00380" > < / a > < span class = "lineno" > 380< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l00381" > < / a > < span class = "lineno" > 381< / span >   ip += up[j] * x[j];< / div >
< div class = "line" > < a name = "l00382" > < / a > < span class = "lineno" > 382< / span >   ip *= 2;< / div >
< div class = "line" > < a name = "l00383" > < / a > < span class = "lineno" > 383< / span >   < / div >
< div class = "line" > < a name = "l00384" > < / a > < span class = "lineno" > 384< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l00385" > < / a > < span class = "lineno" > 385< / span >   x[j] -= ip * up[j];< / div >
< div class = "line" > < a name = "l00386" > < / a > < span class = "lineno" > 386< / span >   < / div >
< div class = "line" > < a name = "l00387" > < / a > < span class = "lineno" > 387< / span >   up += d;< / div >
< div class = "line" > < a name = "l00388" > < / a > < span class = "lineno" > 388< / span >   }< / div >
< div class = "line" > < a name = "l00389" > < / a > < span class = "lineno" > 389< / span >   x += d;< / div >
< div class = "line" > < a name = "l00390" > < / a > < span class = "lineno" > 390< / span >   }< / div >
< div class = "line" > < a name = "l00391" > < / a > < span class = "lineno" > 391< / span >   }< / div >
< div class = "line" > < a name = "l00392" > < / a > < span class = "lineno" > 392< / span >   < / div >
< div class = "line" > < a name = "l00393" > < / a > < span class = "lineno" > 393< / span >   < span class = "comment" > /*********************************************************< / span > < / div >
< div class = "line" > < a name = "l00394" > < / a > < span class = "lineno" > 394< / span >   < span class = "comment" > * Optimized distance computations< / span > < / div >
< div class = "line" > < a name = "l00395" > < / a > < span class = "lineno" > 395< / span >   < span class = "comment" > *********************************************************/< / span > < / div >
< div class = "line" > < a name = "l00396" > < / a > < span class = "lineno" > 396< / span >   < / div >
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< div class = "line" > < a name = "l00397" > < / a > < span class = "lineno" > 397< / span >   < / div >
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< div class = "line" > < a name = "l00398" > < / a > < span class = "lineno" > 398< / span >   < / div >
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< div class = "line" > < a name = "l00399" > < / a > < span class = "lineno" > 399< / span >   < span class = "comment" > /* Functions to compute:< / span > < / div >
< div class = "line" > < a name = "l00400" > < / a > < span class = "lineno" > 400< / span >   < span class = "comment" > - L2 distance between 2 vectors< / span > < / div >
< div class = "line" > < a name = "l00401" > < / a > < span class = "lineno" > 401< / span >   < span class = "comment" > - inner product between 2 vectors< / span > < / div >
< div class = "line" > < a name = "l00402" > < / a > < span class = "lineno" > 402< / span >   < span class = "comment" > - L2 norm of a vector< / span > < / div >
< div class = "line" > < a name = "l00403" > < / a > < span class = "lineno" > 403< / span >   < span class = "comment" > < / span > < / div >
< div class = "line" > < a name = "l00404" > < / a > < span class = "lineno" > 404< / span >   < span class = "comment" > The functions should probably not be invoked when a large number of< / span > < / div >
< div class = "line" > < a name = "l00405" > < / a > < span class = "lineno" > 405< / span >   < span class = "comment" > vectors are be processed in batch (in which case Matrix multiply< / span > < / div >
< div class = "line" > < a name = "l00406" > < / a > < span class = "lineno" > 406< / span >   < span class = "comment" > is faster), but may be useful for comparing vectors isolated in< / span > < / div >
< div class = "line" > < a name = "l00407" > < / a > < span class = "lineno" > 407< / span >   < span class = "comment" > memory.< / span > < / div >
< div class = "line" > < a name = "l00408" > < / a > < span class = "lineno" > 408< / span >   < span class = "comment" > < / span > < / div >
< div class = "line" > < a name = "l00409" > < / a > < span class = "lineno" > 409< / span >   < span class = "comment" > Works with any vectors of any dimension, even unaligned (in which< / span > < / div >
< div class = "line" > < a name = "l00410" > < / a > < span class = "lineno" > 410< / span >   < span class = "comment" > case they are slower).< / span > < / div >
< div class = "line" > < a name = "l00411" > < / a > < span class = "lineno" > 411< / span >   < span class = "comment" > < / span > < / div >
< div class = "line" > < a name = "l00412" > < / a > < span class = "lineno" > 412< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00413" > < / a > < span class = "lineno" > 413< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00414" > < / a > < span class = "lineno" > 414< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00415" > < / a > < span class = "lineno" > 415< / span >   < span class = "comment" > /*********************************************************< / span > < / div >
< div class = "line" > < a name = "l00416" > < / a > < span class = "lineno" > 416< / span >   < span class = "comment" > * Reference implementations< / span > < / div >
< div class = "line" > < a name = "l00417" > < / a > < span class = "lineno" > 417< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00418" > < / a > < span class = "lineno" > 418< / span >   < / div >
< div class = "line" > < a name = "l00419" > < / a > < span class = "lineno" > 419< / span >   < / div >
< div class = "line" > < a name = "l00420" > < / a > < span class = "lineno" > 420< / span >   < / div >
< div class = "line" > < a name = "l00421" > < / a > < span class = "lineno" > 421< / span >   < span class = "comment" > /* same without SSE */< / span > < / div >
< div class = "line" > < a name = "l00422" > < / a > < span class = "lineno" > 422< / span >   < span class = "keywordtype" > float< / span > fvec_L2sqr_ref (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00423" > < / a > < span class = "lineno" > 423< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00424" > < / a > < span class = "lineno" > 424< / span >   < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00425" > < / a > < span class = "lineno" > 425< / span >   {< / div >
< div class = "line" > < a name = "l00426" > < / a > < span class = "lineno" > 426< / span >   < span class = "keywordtype" > size_t< / span > i;< / div >
< div class = "line" > < a name = "l00427" > < / a > < span class = "lineno" > 427< / span >   < span class = "keywordtype" > float< / span > res_ = 0;< / div >
< div class = "line" > < a name = "l00428" > < / a > < span class = "lineno" > 428< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < d; i++) {< / div >
< div class = "line" > < a name = "l00429" > < / a > < span class = "lineno" > 429< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > tmp = x[i] - y[i];< / div >
< div class = "line" > < a name = "l00430" > < / a > < span class = "lineno" > 430< / span >   res_ += tmp * tmp;< / div >
< div class = "line" > < a name = "l00431" > < / a > < span class = "lineno" > 431< / span >   }< / div >
< div class = "line" > < a name = "l00432" > < / a > < span class = "lineno" > 432< / span >   < span class = "keywordflow" > return< / span > res_;< / div >
< div class = "line" > < a name = "l00433" > < / a > < span class = "lineno" > 433< / span >   }< / div >
< div class = "line" > < a name = "l00434" > < / a > < span class = "lineno" > 434< / span >   < / div >
< div class = "line" > < a name = "l00435" > < / a > < span class = "lineno" > 435< / span >   < span class = "keywordtype" > float< / span > fvec_inner_product_ref (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00436" > < / a > < span class = "lineno" > 436< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00437" > < / a > < span class = "lineno" > 437< / span >   < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00438" > < / a > < span class = "lineno" > 438< / span >   {< / div >
< div class = "line" > < a name = "l00439" > < / a > < span class = "lineno" > 439< / span >   < span class = "keywordtype" > size_t< / span > i;< / div >
< div class = "line" > < a name = "l00440" > < / a > < span class = "lineno" > 440< / span >   < span class = "keywordtype" > float< / span > res_ = 0;< / div >
< div class = "line" > < a name = "l00441" > < / a > < span class = "lineno" > 441< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < d; i++)< / div >
< div class = "line" > < a name = "l00442" > < / a > < span class = "lineno" > 442< / span >   res_ += x[i] * y[i];< / div >
< div class = "line" > < a name = "l00443" > < / a > < span class = "lineno" > 443< / span >   < span class = "keywordflow" > return< / span > res_;< / div >
< div class = "line" > < a name = "l00444" > < / a > < span class = "lineno" > 444< / span >   }< / div >
< div class = "line" > < a name = "l00445" > < / a > < span class = "lineno" > 445< / span >   < / div >
< div class = "line" > < a name = "l00446" > < / a > < span class = "lineno" > 446< / span >   < span class = "keywordtype" > float< / span > fvec_norm_L2sqr_ref (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * __restrict x,< / div >
< div class = "line" > < a name = "l00447" > < / a > < span class = "lineno" > 447< / span >   < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00448" > < / a > < span class = "lineno" > 448< / span >   {< / div >
< div class = "line" > < a name = "l00449" > < / a > < span class = "lineno" > 449< / span >   < span class = "keywordtype" > size_t< / span > i;< / div >
< div class = "line" > < a name = "l00450" > < / a > < span class = "lineno" > 450< / span >   < span class = "keywordtype" > double< / span > res_ = 0;< / div >
< div class = "line" > < a name = "l00451" > < / a > < span class = "lineno" > 451< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < d; i++)< / div >
< div class = "line" > < a name = "l00452" > < / a > < span class = "lineno" > 452< / span >   res_ += x[i] * x[i];< / div >
< div class = "line" > < a name = "l00453" > < / a > < span class = "lineno" > 453< / span >   < span class = "keywordflow" > return< / span > res_;< / div >
< div class = "line" > < a name = "l00454" > < / a > < span class = "lineno" > 454< / span >   }< / div >
< div class = "line" > < a name = "l00455" > < / a > < span class = "lineno" > 455< / span >   < / div >
< div class = "line" > < a name = "l00456" > < / a > < span class = "lineno" > 456< / span >   < / div >
< div class = "line" > < a name = "l00457" > < / a > < span class = "lineno" > 457< / span >   < span class = "comment" > /*********************************************************< / span > < / div >
< div class = "line" > < a name = "l00458" > < / a > < span class = "lineno" > 458< / span >   < span class = "comment" > * SSE implementations< / span > < / div >
< div class = "line" > < a name = "l00459" > < / a > < span class = "lineno" > 459< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00460" > < / a > < span class = "lineno" > 460< / span >   < / div >
< div class = "line" > < a name = "l00461" > < / a > < span class = "lineno" > 461< / span >   < span class = "comment" > // reads 0 < = d < 4 floats as __m128< / span > < / div >
< div class = "line" > < a name = "l00462" > < / a > < span class = "lineno" > 462< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > inline< / span > __m128 masked_read (< span class = "keywordtype" > int< / span > d, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *x)< / div >
< div class = "line" > < a name = "l00463" > < / a > < span class = "lineno" > 463< / span >   {< / div >
< div class = "line" > < a name = "l00464" > < / a > < span class = "lineno" > 464< / span >   assert (0 < = d & & d < 4);< / div >
< div class = "line" > < a name = "l00465" > < / a > < span class = "lineno" > 465< / span >   __attribute__((__aligned__(16))) float buf[4] = {0, 0, 0, 0};< / div >
< div class = "line" > < a name = "l00466" > < / a > < span class = "lineno" > 466< / span >   < span class = "keywordflow" > switch< / span > (d) {< / div >
< div class = "line" > < a name = "l00467" > < / a > < span class = "lineno" > 467< / span >   < span class = "keywordflow" > case< / span > 3:< / div >
< div class = "line" > < a name = "l00468" > < / a > < span class = "lineno" > 468< / span >   buf[2] = x[2];< / div >
< div class = "line" > < a name = "l00469" > < / a > < span class = "lineno" > 469< / span >   < span class = "keywordflow" > case< / span > 2:< / div >
< div class = "line" > < a name = "l00470" > < / a > < span class = "lineno" > 470< / span >   buf[1] = x[1];< / div >
< div class = "line" > < a name = "l00471" > < / a > < span class = "lineno" > 471< / span >   < span class = "keywordflow" > case< / span > 1:< / div >
< div class = "line" > < a name = "l00472" > < / a > < span class = "lineno" > 472< / span >   buf[0] = x[0];< / div >
< div class = "line" > < a name = "l00473" > < / a > < span class = "lineno" > 473< / span >   }< / div >
< div class = "line" > < a name = "l00474" > < / a > < span class = "lineno" > 474< / span >   < span class = "keywordflow" > return< / span > _mm_load_ps (buf);< / div >
< div class = "line" > < a name = "l00475" > < / a > < span class = "lineno" > 475< / span >   < span class = "comment" > // cannot use AVX2 _mm_mask_set1_epi32< / span > < / div >
< div class = "line" > < a name = "l00476" > < / a > < span class = "lineno" > 476< / span >   }< / div >
< div class = "line" > < a name = "l00477" > < / a > < span class = "lineno" > 477< / span >   < / div >
< div class = "line" > < a name = "l00478" > < / a > < span class = "lineno" > 478< / span >   < / div >
< div class = "line" > < a name = "l00479" > < / a > < span class = "lineno" > 479< / span >   < / div >
< div class = "line" > < a name = "l00480" > < / a > < span class = "lineno" > 480< / span >   < span class = "comment" > /* SSE-implementation of L2 distance */< / span > < / div >
< div class = "line" > < a name = "l00481" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > 481< / a > < / span >   < span class = "keywordtype" > float< / span > < a class = "code" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > fvec_L2sqr< / a > (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00482" > < / a > < span class = "lineno" > 482< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00483" > < / a > < span class = "lineno" > 483< / span >   < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00484" > < / a > < span class = "lineno" > 484< / span >   {< / div >
< div class = "line" > < a name = "l00485" > < / a > < span class = "lineno" > 485< / span >   __m128 msum1 = _mm_setzero_ps();< / div >
< div class = "line" > < a name = "l00486" > < / a > < span class = "lineno" > 486< / span >   < / div >
< div class = "line" > < a name = "l00487" > < / a > < span class = "lineno" > 487< / span >   < span class = "keywordflow" > while< / span > (d > = 4) {< / div >
< div class = "line" > < a name = "l00488" > < / a > < span class = "lineno" > 488< / span >   __m128 mx = _mm_loadu_ps (x); x += 4;< / div >
< div class = "line" > < a name = "l00489" > < / a > < span class = "lineno" > 489< / span >   __m128 my = _mm_loadu_ps (y); y += 4;< / div >
< div class = "line" > < a name = "l00490" > < / a > < span class = "lineno" > 490< / span >   < span class = "keyword" > const< / span > __m128 a_m_b1 = mx - my;< / div >
< div class = "line" > < a name = "l00491" > < / a > < span class = "lineno" > 491< / span >   msum1 += a_m_b1 * a_m_b1;< / div >
< div class = "line" > < a name = "l00492" > < / a > < span class = "lineno" > 492< / span >   d -= 4;< / div >
< div class = "line" > < a name = "l00493" > < / a > < span class = "lineno" > 493< / span >   }< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00494" > < / a > < span class = "lineno" > 494< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00495" > < / a > < span class = "lineno" > 495< / span >   < span class = "keywordflow" > if< / span > (d > 0) {< / div >
< div class = "line" > < a name = "l00496" > < / a > < span class = "lineno" > 496< / span >   < span class = "comment" > // add the last 1, 2 or 3 values< / span > < / div >
< div class = "line" > < a name = "l00497" > < / a > < span class = "lineno" > 497< / span >   __m128 mx = masked_read (d, x);< / div >
< div class = "line" > < a name = "l00498" > < / a > < span class = "lineno" > 498< / span >   __m128 my = masked_read (d, y);< / div >
< div class = "line" > < a name = "l00499" > < / a > < span class = "lineno" > 499< / span >   __m128 a_m_b1 = mx - my;< / div >
< div class = "line" > < a name = "l00500" > < / a > < span class = "lineno" > 500< / span >   msum1 += a_m_b1 * a_m_b1;< / div >
< div class = "line" > < a name = "l00501" > < / a > < span class = "lineno" > 501< / span >   }< / div >
< div class = "line" > < a name = "l00502" > < / a > < span class = "lineno" > 502< / span >   < / div >
< div class = "line" > < a name = "l00503" > < / a > < span class = "lineno" > 503< / span >   msum1 = _mm_hadd_ps (msum1, msum1);< / div >
< div class = "line" > < a name = "l00504" > < / a > < span class = "lineno" > 504< / span >   msum1 = _mm_hadd_ps (msum1, msum1);< / div >
< div class = "line" > < a name = "l00505" > < / a > < span class = "lineno" > 505< / span >   < span class = "keywordflow" > return< / span > _mm_cvtss_f32 (msum1);< / div >
< div class = "line" > < a name = "l00506" > < / a > < span class = "lineno" > 506< / span >   }< / div >
< div class = "line" > < a name = "l00507" > < / a > < span class = "lineno" > 507< / span >   < / div >
< div class = "line" > < a name = "l00508" > < / a > < span class = "lineno" > 508< / span >   < / div >
< div class = "line" > < a name = "l00509" > < / a > < span class = "lineno" > 509< / span >   < span class = "keywordtype" > float< / span > fvec_inner_product (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00510" > < / a > < span class = "lineno" > 510< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00511" > < / a > < span class = "lineno" > 511< / span >   < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00512" > < / a > < span class = "lineno" > 512< / span >   {< / div >
< div class = "line" > < a name = "l00513" > < / a > < span class = "lineno" > 513< / span >   __m128 mx, my;< / div >
< div class = "line" > < a name = "l00514" > < / a > < span class = "lineno" > 514< / span >   __m128 msum1 = _mm_setzero_ps();< / div >
< div class = "line" > < a name = "l00515" > < / a > < span class = "lineno" > 515< / span >   < / div >
< div class = "line" > < a name = "l00516" > < / a > < span class = "lineno" > 516< / span >   < span class = "keywordflow" > while< / span > (d > = 4) {< / div >
< div class = "line" > < a name = "l00517" > < / a > < span class = "lineno" > 517< / span >   mx = _mm_loadu_ps (x); x += 4;< / div >
< div class = "line" > < a name = "l00518" > < / a > < span class = "lineno" > 518< / span >   my = _mm_loadu_ps (y); y += 4;< / div >
< div class = "line" > < a name = "l00519" > < / a > < span class = "lineno" > 519< / span >   msum1 = _mm_add_ps (msum1, _mm_mul_ps (mx, my));< / div >
< div class = "line" > < a name = "l00520" > < / a > < span class = "lineno" > 520< / span >   d -= 4;< / div >
< div class = "line" > < a name = "l00521" > < / a > < span class = "lineno" > 521< / span >   }< / div >
< div class = "line" > < a name = "l00522" > < / a > < span class = "lineno" > 522< / span >   < / div >
< div class = "line" > < a name = "l00523" > < / a > < span class = "lineno" > 523< / span >   < span class = "comment" > // add the last 1, 2, or 3 values< / span > < / div >
< div class = "line" > < a name = "l00524" > < / a > < span class = "lineno" > 524< / span >   mx = masked_read (d, x);< / div >
< div class = "line" > < a name = "l00525" > < / a > < span class = "lineno" > 525< / span >   my = masked_read (d, y);< / div >
< div class = "line" > < a name = "l00526" > < / a > < span class = "lineno" > 526< / span >   __m128 prod = _mm_mul_ps (mx, my);< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00527" > < / a > < span class = "lineno" > 527< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00528" > < / a > < span class = "lineno" > 528< / span >   msum1 = _mm_add_ps (msum1, prod);< / div >
< div class = "line" > < a name = "l00529" > < / a > < span class = "lineno" > 529< / span >   < / div >
< div class = "line" > < a name = "l00530" > < / a > < span class = "lineno" > 530< / span >   msum1 = _mm_hadd_ps (msum1, msum1);< / div >
< div class = "line" > < a name = "l00531" > < / a > < span class = "lineno" > 531< / span >   msum1 = _mm_hadd_ps (msum1, msum1);< / div >
< div class = "line" > < a name = "l00532" > < / a > < span class = "lineno" > 532< / span >   < span class = "keywordflow" > return< / span > _mm_cvtss_f32 (msum1);< / div >
< div class = "line" > < a name = "l00533" > < / a > < span class = "lineno" > 533< / span >   }< / div >
< div class = "line" > < a name = "l00534" > < / a > < span class = "lineno" > 534< / span >   < / div >
< div class = "line" > < a name = "l00535" > < / a > < span class = "lineno" > 535< / span >   < / div >
< div class = "line" > < a name = "l00536" > < / a > < span class = "lineno" > 536< / span >   < / div >
< div class = "line" > < a name = "l00537" > < / a > < span class = "lineno" > 537< / span >   < / div >
< div class = "line" > < a name = "l00538" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > 538< / a > < / span >   < span class = "keywordtype" > float< / span > < a class = "code" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > fvec_norm_L2sqr< / a > (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00539" > < / a > < span class = "lineno" > 539< / span >   < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00540" > < / a > < span class = "lineno" > 540< / span >   {< / div >
< div class = "line" > < a name = "l00541" > < / a > < span class = "lineno" > 541< / span >   __m128 mx;< / div >
< div class = "line" > < a name = "l00542" > < / a > < span class = "lineno" > 542< / span >   __m128 msum1 = _mm_setzero_ps();< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00543" > < / a > < span class = "lineno" > 543< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00544" > < / a > < span class = "lineno" > 544< / span >   < span class = "keywordflow" > while< / span > (d > = 4) {< / div >
< div class = "line" > < a name = "l00545" > < / a > < span class = "lineno" > 545< / span >   mx = _mm_loadu_ps (x); x += 4;< / div >
< div class = "line" > < a name = "l00546" > < / a > < span class = "lineno" > 546< / span >   msum1 = _mm_add_ps (msum1, _mm_mul_ps (mx, mx));< / div >
< div class = "line" > < a name = "l00547" > < / a > < span class = "lineno" > 547< / span >   d -= 4;< / div >
< div class = "line" > < a name = "l00548" > < / a > < span class = "lineno" > 548< / span >   }< / div >
< div class = "line" > < a name = "l00549" > < / a > < span class = "lineno" > 549< / span >   < / div >
< div class = "line" > < a name = "l00550" > < / a > < span class = "lineno" > 550< / span >   mx = masked_read (d, x);< / div >
< div class = "line" > < a name = "l00551" > < / a > < span class = "lineno" > 551< / span >   msum1 = _mm_add_ps (msum1, _mm_mul_ps (mx, mx));< / div >
< div class = "line" > < a name = "l00552" > < / a > < span class = "lineno" > 552< / span >   < / div >
< div class = "line" > < a name = "l00553" > < / a > < span class = "lineno" > 553< / span >   msum1 = _mm_hadd_ps (msum1, msum1);< / div >
< div class = "line" > < a name = "l00554" > < / a > < span class = "lineno" > 554< / span >   msum1 = _mm_hadd_ps (msum1, msum1);< / div >
< div class = "line" > < a name = "l00555" > < / a > < span class = "lineno" > 555< / span >   < span class = "keywordflow" > return< / span > _mm_cvtss_f32 (msum1);< / div >
< div class = "line" > < a name = "l00556" > < / a > < span class = "lineno" > 556< / span >   }< / div >
< div class = "line" > < a name = "l00557" > < / a > < span class = "lineno" > 557< / span >   < / div >
< div class = "line" > < a name = "l00558" > < / a > < span class = "lineno" > 558< / span >   < / div >
< div class = "line" > < a name = "l00559" > < / a > < span class = "lineno" > 559< / span >   < / div >
< div class = "line" > < a name = "l00560" > < / a > < span class = "lineno" > 560< / span >   < span class = "comment" > /*********************************************************< / span > < / div >
< div class = "line" > < a name = "l00561" > < / a > < span class = "lineno" > 561< / span >   < span class = "comment" > * AVX implementations< / span > < / div >
< div class = "line" > < a name = "l00562" > < / a > < span class = "lineno" > 562< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00563" > < / a > < span class = "lineno" > 563< / span >   < span class = "comment" > * Disabled for now, it is not faster than SSE on current machines< / span > < / div >
< div class = "line" > < a name = "l00564" > < / a > < span class = "lineno" > 564< / span >   < span class = "comment" > * see P57425519< / span > < / div >
< div class = "line" > < a name = "l00565" > < / a > < span class = "lineno" > 565< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00566" > < / a > < span class = "lineno" > 566< / span >   < / div >
< div class = "line" > < a name = "l00567" > < / a > < span class = "lineno" > 567< / span >   < span class = "preprocessor" > #if 0< / span > < / div >
< div class = "line" > < a name = "l00568" > < / a > < span class = "lineno" > 568< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00569" > < / a > < span class = "lineno" > 569< / span >   < / div >
< div class = "line" > < a name = "l00570" > < / a > < span class = "lineno" > 570< / span >   < / div >
< div class = "line" > < a name = "l00571" > < / a > < span class = "lineno" > 571< / span >   < span class = "comment" > // reads 0 < = d < 8 floats as __m256< / span > < / div >
< div class = "line" > < a name = "l00572" > < / a > < span class = "lineno" > 572< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > inline< / span > __m256 masked_read_8 (< span class = "keywordtype" > int< / span > d, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *x)< / div >
< div class = "line" > < a name = "l00573" > < / a > < span class = "lineno" > 573< / span >   {< / div >
< div class = "line" > < a name = "l00574" > < / a > < span class = "lineno" > 574< / span >   assert (0 < = d & & d < 8);< / div >
< div class = "line" > < a name = "l00575" > < / a > < span class = "lineno" > 575< / span >   < span class = "keywordflow" > if< / span > (d < 4) {< / div >
< div class = "line" > < a name = "l00576" > < / a > < span class = "lineno" > 576< / span >   __m256 res = _mm256_setzero_ps ();< / div >
< div class = "line" > < a name = "l00577" > < / a > < span class = "lineno" > 577< / span >   res = _mm256_insertf128_ps (res, masked_read (d, x), 0);< / div >
< div class = "line" > < a name = "l00578" > < / a > < span class = "lineno" > 578< / span >   < span class = "keywordflow" > return< / span > res;< / div >
< div class = "line" > < a name = "l00579" > < / a > < span class = "lineno" > 579< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00580" > < / a > < span class = "lineno" > 580< / span >   __m256 res;< / div >
< div class = "line" > < a name = "l00581" > < / a > < span class = "lineno" > 581< / span >   res = _mm256_insertf128_ps (res, _mm_loadu_ps (x), 0);< / div >
< div class = "line" > < a name = "l00582" > < / a > < span class = "lineno" > 582< / span >   res = _mm256_insertf128_ps (res, masked_read (d - 4, x + 4), 1);< / div >
< div class = "line" > < a name = "l00583" > < / a > < span class = "lineno" > 583< / span >   < span class = "keywordflow" > return< / span > res;< / div >
< div class = "line" > < a name = "l00584" > < / a > < span class = "lineno" > 584< / span >   }< / div >
< div class = "line" > < a name = "l00585" > < / a > < span class = "lineno" > 585< / span >   }< / div >
< div class = "line" > < a name = "l00586" > < / a > < span class = "lineno" > 586< / span >   < / div >
< div class = "line" > < a name = "l00587" > < / a > < span class = "lineno" > 587< / span >   < / div >
< div class = "line" > < a name = "l00588" > < / a > < span class = "lineno" > 588< / span >   < span class = "keywordtype" > float< / span > < a class = "code" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > fvec_L2sqr< / a > (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00589" > < / a > < span class = "lineno" > 589< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00590" > < / a > < span class = "lineno" > 590< / span >   < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00591" > < / a > < span class = "lineno" > 591< / span >   {< / div >
< div class = "line" > < a name = "l00592" > < / a > < span class = "lineno" > 592< / span >   __m256 msum1 = _mm256_setzero_ps();< / div >
< div class = "line" > < a name = "l00593" > < / a > < span class = "lineno" > 593< / span >   < / div >
< div class = "line" > < a name = "l00594" > < / a > < span class = "lineno" > 594< / span >   < span class = "keywordflow" > while< / span > (d > = 8) {< / div >
< div class = "line" > < a name = "l00595" > < / a > < span class = "lineno" > 595< / span >   __m256 mx = _mm256_loadu_ps (x); x += 8;< / div >
< div class = "line" > < a name = "l00596" > < / a > < span class = "lineno" > 596< / span >   __m256 my = _mm256_loadu_ps (y); y += 8;< / div >
< div class = "line" > < a name = "l00597" > < / a > < span class = "lineno" > 597< / span >   < span class = "keyword" > const< / span > __m256 a_m_b1 = mx - my;< / div >
< div class = "line" > < a name = "l00598" > < / a > < span class = "lineno" > 598< / span >   msum1 += a_m_b1 * a_m_b1;< / div >
< div class = "line" > < a name = "l00599" > < / a > < span class = "lineno" > 599< / span >   d -= 8;< / div >
< div class = "line" > < a name = "l00600" > < / a > < span class = "lineno" > 600< / span >   }< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00601" > < / a > < span class = "lineno" > 601< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00602" > < / a > < span class = "lineno" > 602< / span >   < span class = "keywordflow" > if< / span > (d > 0) {< / div >
< div class = "line" > < a name = "l00603" > < / a > < span class = "lineno" > 603< / span >   < span class = "comment" > // add the last 1, 2 or 3 values< / span > < / div >
< div class = "line" > < a name = "l00604" > < / a > < span class = "lineno" > 604< / span >   __m256 mx = masked_read_8 (d, x);< / div >
< div class = "line" > < a name = "l00605" > < / a > < span class = "lineno" > 605< / span >   __m256 my = masked_read_8 (d, y);< / div >
< div class = "line" > < a name = "l00606" > < / a > < span class = "lineno" > 606< / span >   __m256 a_m_b1 = mx - my;< / div >
< div class = "line" > < a name = "l00607" > < / a > < span class = "lineno" > 607< / span >   msum1 += a_m_b1 * a_m_b1;< / div >
< div class = "line" > < a name = "l00608" > < / a > < span class = "lineno" > 608< / span >   }< / div >
< div class = "line" > < a name = "l00609" > < / a > < span class = "lineno" > 609< / span >   < / div >
< div class = "line" > < a name = "l00610" > < / a > < span class = "lineno" > 610< / span >   __m128 msum2 = _mm256_extractf128_ps(msum1, 1);< / div >
< div class = "line" > < a name = "l00611" > < / a > < span class = "lineno" > 611< / span >   msum2 += _mm256_extractf128_ps(msum1, 0);< / div >
< div class = "line" > < a name = "l00612" > < / a > < span class = "lineno" > 612< / span >   < / div >
< div class = "line" > < a name = "l00613" > < / a > < span class = "lineno" > 613< / span >   msum2 = _mm_hadd_ps (msum2, msum2);< / div >
< div class = "line" > < a name = "l00614" > < / a > < span class = "lineno" > 614< / span >   msum2 = _mm_hadd_ps (msum2, msum2);< / div >
< div class = "line" > < a name = "l00615" > < / a > < span class = "lineno" > 615< / span >   < span class = "keywordflow" > return< / span > _mm_cvtss_f32 (msum2);< / div >
< div class = "line" > < a name = "l00616" > < / a > < span class = "lineno" > 616< / span >   }< / div >
< div class = "line" > < a name = "l00617" > < / a > < span class = "lineno" > 617< / span >   < / div >
< div class = "line" > < a name = "l00618" > < / a > < span class = "lineno" > 618< / span >   < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a name = "l00619" > < / a > < span class = "lineno" > 619< / span >   < span class = "preprocessor" > < / span > < / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00620" > < / a > < span class = "lineno" > 620< / span >   < / div >
< div class = "line" > < a name = "l00621" > < / a > < span class = "lineno" > 621< / span >   < / div >
< div class = "line" > < a name = "l00622" > < / a > < span class = "lineno" > 622< / span >   < / div >
< div class = "line" > < a name = "l00623" > < / a > < span class = "lineno" > 623< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00624" > < / a > < span class = "lineno" > 624< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l00625" > < / a > < span class = "lineno" > 625< / span >   < span class = "comment" > * Matrix/vector ops< / span > < / div >
< div class = "line" > < a name = "l00626" > < / a > < span class = "lineno" > 626< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00627" > < / a > < span class = "lineno" > 627< / span >   < / div >
< div class = "line" > < a name = "l00628" > < / a > < span class = "lineno" > 628< / span >   < / div >
< div class = "line" > < a name = "l00629" > < / a > < span class = "lineno" > 629< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00630" > < / a > < span class = "lineno" > 630< / span >   < span class = "comment" > /* Compute the inner product between a vector x and< / span > < / div >
< div class = "line" > < a name = "l00631" > < / a > < span class = "lineno" > 631< / span >   < span class = "comment" > a set of ny vectors y.< / span > < / div >
< div class = "line" > < a name = "l00632" > < / a > < span class = "lineno" > 632< / span >   < span class = "comment" > These functions are not intended to replace BLAS matrix-matrix, as they< / span > < / div >
< div class = "line" > < a name = "l00633" > < / a > < span class = "lineno" > 633< / span >   < span class = "comment" > would be significantly less efficient in this case. */< / span > < / div >
< div class = "line" > < a name = "l00634" > < / a > < span class = "lineno" > 634< / span >   < span class = "keywordtype" > void< / span > fvec_inner_products_ny (< span class = "keywordtype" > float< / span > * __restrict ip,< / div >
< div class = "line" > < a name = "l00635" > < / a > < span class = "lineno" > 635< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00636" > < / a > < span class = "lineno" > 636< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00637" > < / a > < span class = "lineno" > 637< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > ny)< / div >
< div class = "line" > < a name = "l00638" > < / a > < span class = "lineno" > 638< / span >   {< / div >
< div class = "line" > < a name = "l00639" > < / a > < span class = "lineno" > 639< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < ny; i++) {< / div >
< div class = "line" > < a name = "l00640" > < / a > < span class = "lineno" > 640< / span >   ip[i] = fvec_inner_product (x, y, d);< / div >
< div class = "line" > < a name = "l00641" > < / a > < span class = "lineno" > 641< / span >   y += d;< / div >
< div class = "line" > < a name = "l00642" > < / a > < span class = "lineno" > 642< / span >   }< / div >
< div class = "line" > < a name = "l00643" > < / a > < span class = "lineno" > 643< / span >   }< / div >
< div class = "line" > < a name = "l00644" > < / a > < span class = "lineno" > 644< / span >   < / div >
< div class = "line" > < a name = "l00645" > < / a > < span class = "lineno" > 645< / span >   < / div >
< div class = "line" > < a name = "l00646" > < / a > < span class = "lineno" > 646< / span >   < / div >
< div class = "line" > < a name = "l00647" > < / a > < span class = "lineno" > 647< / span >   < / div >
< div class = "line" > < a name = "l00648" > < / a > < span class = "lineno" > 648< / span >   < span class = "comment" > /* compute ny L2 distances between x and a set of vectors y */< / span > < / div >
< div class = "line" > < a name = "l00649" > < / a > < span class = "lineno" > 649< / span >   < span class = "keywordtype" > void< / span > fvec_L2sqr_ny (< span class = "keywordtype" > float< / span > * __restrict dis,< / div >
< div class = "line" > < a name = "l00650" > < / a > < span class = "lineno" > 650< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00651" > < / a > < span class = "lineno" > 651< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00652" > < / a > < span class = "lineno" > 652< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > ny)< / div >
< div class = "line" > < a name = "l00653" > < / a > < span class = "lineno" > 653< / span >   {< / div >
< div class = "line" > < a name = "l00654" > < / a > < span class = "lineno" > 654< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < ny; i++) {< / div >
< div class = "line" > < a name = "l00655" > < / a > < span class = "lineno" > 655< / span >   dis[i] = < a class = "code" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > fvec_L2sqr< / a > (x, y, d);< / div >
< div class = "line" > < a name = "l00656" > < / a > < span class = "lineno" > 656< / span >   y += d;< / div >
< div class = "line" > < a name = "l00657" > < / a > < span class = "lineno" > 657< / span >   }< / div >
< div class = "line" > < a name = "l00658" > < / a > < span class = "lineno" > 658< / span >   }< / div >
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< div class = "line" > < a name = "l00659" > < / a > < span class = "lineno" > 659< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00660" > < / a > < span class = "lineno" > 660< / span >   < / div >
< div class = "line" > < a name = "l00661" > < / a > < span class = "lineno" > 661< / span >   < / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00662" > < / a > < span class = "lineno" > 662< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00663" > < / a > < span class = "lineno" > 663< / span >   < span class = "comment" > /* Compute the L2 norm of a set of nx vectors */< / span > < / div >
< div class = "line" > < a name = "l00664" > < / a > < span class = "lineno" > 664< / span >   < span class = "keywordtype" > void< / span > fvec_norms_L2 (< span class = "keywordtype" > float< / span > * __restrict nr,< / div >
< div class = "line" > < a name = "l00665" > < / a > < span class = "lineno" > 665< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * __restrict x,< / div >
< div class = "line" > < a name = "l00666" > < / a > < span class = "lineno" > 666< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx)< / div >
< div class = "line" > < a name = "l00667" > < / a > < span class = "lineno" > 667< / span >   {< / div >
< div class = "line" > < a name = "l00668" > < / a > < span class = "lineno" > 668< / span >   < / div >
< div class = "line" > < a name = "l00669" > < / a > < span class = "lineno" > 669< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00670" > < / a > < span class = "lineno" > 670< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l00671" > < / a > < span class = "lineno" > 671< / span >   nr[i] = sqrtf (< a class = "code" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > fvec_norm_L2sqr< / a > (x + i * d, d));< / div >
< div class = "line" > < a name = "l00672" > < / a > < span class = "lineno" > 672< / span >   }< / div >
< div class = "line" > < a name = "l00673" > < / a > < span class = "lineno" > 673< / span >   }< / div >
< div class = "line" > < a name = "l00674" > < / a > < span class = "lineno" > 674< / span >   < / div >
< div class = "line" > < a name = "l00675" > < / a > < span class = "lineno" > 675< / span >   < span class = "keywordtype" > void< / span > fvec_norms_L2sqr (< span class = "keywordtype" > float< / span > * __restrict nr,< / div >
< div class = "line" > < a name = "l00676" > < / a > < span class = "lineno" > 676< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * __restrict x,< / div >
< div class = "line" > < a name = "l00677" > < / a > < span class = "lineno" > 677< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx)< / div >
< div class = "line" > < a name = "l00678" > < / a > < span class = "lineno" > 678< / span >   {< / div >
< div class = "line" > < a name = "l00679" > < / a > < span class = "lineno" > 679< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00680" > < / a > < span class = "lineno" > 680< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++)< / div >
< div class = "line" > < a name = "l00681" > < / a > < span class = "lineno" > 681< / span >   nr[i] = < a class = "code" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > fvec_norm_L2sqr< / a > (x + i * d, d);< / div >
< div class = "line" > < a name = "l00682" > < / a > < span class = "lineno" > 682< / span >   }< / div >
< div class = "line" > < a name = "l00683" > < / a > < span class = "lineno" > 683< / span >   < / div >
< div class = "line" > < a name = "l00684" > < / a > < span class = "lineno" > 684< / span >   < / div >
< div class = "line" > < a name = "l00685" > < / a > < span class = "lineno" > 685< / span >   < / div >
< div class = "line" > < a name = "l00686" > < / a > < span class = "lineno" > 686< / span >   < span class = "keywordtype" > void< / span > fvec_renorm_L2 (< span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > float< / span > * __restrict x)< / div >
< div class = "line" > < a name = "l00687" > < / a > < span class = "lineno" > 687< / span >   {< / div >
< div class = "line" > < a name = "l00688" > < / a > < span class = "lineno" > 688< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00689" > < / a > < span class = "lineno" > 689< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l00690" > < / a > < span class = "lineno" > 690< / span >   < span class = "keywordtype" > float< / span > * __restrict xi = x + i * d;< / div >
< div class = "line" > < a name = "l00691" > < / a > < span class = "lineno" > 691< / span >   < / div >
< div class = "line" > < a name = "l00692" > < / a > < span class = "lineno" > 692< / span >   < span class = "keywordtype" > float< / span > nr = < a class = "code" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > fvec_norm_L2sqr< / a > (xi, d);< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00693" > < / a > < span class = "lineno" > 693< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00694" > < / a > < span class = "lineno" > 694< / span >   < span class = "keywordflow" > if< / span > (nr > 0) {< / div >
< div class = "line" > < a name = "l00695" > < / a > < span class = "lineno" > 695< / span >   < span class = "keywordtype" > size_t< / span > j;< / div >
< div class = "line" > < a name = "l00696" > < / a > < span class = "lineno" > 696< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > inv_nr = 1.0 / sqrtf (nr);< / div >
< div class = "line" > < a name = "l00697" > < / a > < span class = "lineno" > 697< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l00698" > < / a > < span class = "lineno" > 698< / span >   xi[j] *= inv_nr;< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00699" > < / a > < span class = "lineno" > 699< / span >   }< / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00700" > < / a > < span class = "lineno" > 700< / span >   }< / div >
< div class = "line" > < a name = "l00701" > < / a > < span class = "lineno" > 701< / span >   }< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00702" > < / a > < span class = "lineno" > 702< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00703" > < / a > < span class = "lineno" > 703< / span >   < / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00704" > < / a > < span class = "lineno" > 704< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00705" > < / a > < span class = "lineno" > 705< / span >   < / div >
< div class = "line" > < a name = "l00706" > < / a > < span class = "lineno" > 706< / span >   < / div >
< div class = "line" > < a name = "l00707" > < / a > < span class = "lineno" > 707< / span >   < / div >
< div class = "line" > < a name = "l00708" > < / a > < span class = "lineno" > 708< / span >   < / div >
< div class = "line" > < a name = "l00709" > < / a > < span class = "lineno" > 709< / span >   < / div >
< div class = "line" > < a name = "l00710" > < / a > < span class = "lineno" > 710< / span >   < / div >
< div class = "line" > < a name = "l00711" > < / a > < span class = "lineno" > 711< / span >   < / div >
< div class = "line" > < a name = "l00712" > < / a > < span class = "lineno" > 712< / span >   < / div >
< div class = "line" > < a name = "l00713" > < / a > < span class = "lineno" > 713< / span >   < / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00714" > < / a > < span class = "lineno" > 714< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00715" > < / a > < span class = "lineno" > 715< / span >   < / div >
< div class = "line" > < a name = "l00716" > < / a > < span class = "lineno" > 716< / span >   < / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00717" > < / a > < span class = "lineno" > 717< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00718" > < / a > < span class = "lineno" > 718< / span >   < / div >
< div class = "line" > < a name = "l00719" > < / a > < span class = "lineno" > 719< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l00720" > < / a > < span class = "lineno" > 720< / span >   < span class = "comment" > * KNN functions< / span > < / div >
< div class = "line" > < a name = "l00721" > < / a > < span class = "lineno" > 721< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00722" > < / a > < span class = "lineno" > 722< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00723" > < / a > < span class = "lineno" > 723< / span >   < / div >
< div class = "line" > < a name = "l00724" > < / a > < span class = "lineno" > 724< / span >   < / div >
< div class = "line" > < a name = "l00725" > < / a > < span class = "lineno" > 725< / span >   < span class = "comment" > /* Find the nearest neighbors for nx queries in a set of ny vectors */< / span > < / div >
< div class = "line" > < a name = "l00726" > < / a > < span class = "lineno" > 726< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > knn_inner_product_sse (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00727" > < / a > < span class = "lineno" > 727< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00728" > < / a > < span class = "lineno" > 728< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l00729" > < / a > < span class = "lineno" > 729< / span >   float_minheap_array_t * res)< / div >
< div class = "line" > < a name = "l00730" > < / a > < span class = "lineno" > 730< / span >   {< / div >
< div class = "line" > < a name = "l00731" > < / a > < span class = "lineno" > 731< / span >   < span class = "keywordtype" > size_t< / span > k = res-> k;< / div >
< div class = "line" > < a name = "l00732" > < / a > < span class = "lineno" > 732< / span >   < / div >
< div class = "line" > < a name = "l00733" > < / a > < span class = "lineno" > 733< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00734" > < / a > < span class = "lineno" > 734< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l00735" > < / a > < span class = "lineno" > 735< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x_ = x + i * d;< / div >
< div class = "line" > < a name = "l00736" > < / a > < span class = "lineno" > 736< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y_ = y;< / div >
< div class = "line" > < a name = "l00737" > < / a > < span class = "lineno" > 737< / span >   < / div >
< div class = "line" > < a name = "l00738" > < / a > < span class = "lineno" > 738< / span >   < span class = "keywordtype" > float< / span > * __restrict simi = res-> get_val(i);< / div >
< div class = "line" > < a name = "l00739" > < / a > < span class = "lineno" > 739< / span >   < span class = "keywordtype" > long< / span > * __restrict idxi = res-> get_ids (i);< / div >
< div class = "line" > < a name = "l00740" > < / a > < span class = "lineno" > 740< / span >   < / div >
< div class = "line" > < a name = "l00741" > < / a > < span class = "lineno" > 741< / span >   minheap_heapify (k, simi, idxi);< / div >
< div class = "line" > < a name = "l00742" > < / a > < span class = "lineno" > 742< / span >   < / div >
< div class = "line" > < a name = "l00743" > < / a > < span class = "lineno" > 743< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < ny; j++) {< / div >
< div class = "line" > < a name = "l00744" > < / a > < span class = "lineno" > 744< / span >   < span class = "keywordtype" > float< / span > ip = fvec_inner_product (x_, y_, d);< / div >
< div class = "line" > < a name = "l00745" > < / a > < span class = "lineno" > 745< / span >   < / div >
< div class = "line" > < a name = "l00746" > < / a > < span class = "lineno" > 746< / span >   < span class = "keywordflow" > if< / span > (ip > simi[0]) {< / div >
< div class = "line" > < a name = "l00747" > < / a > < span class = "lineno" > 747< / span >   minheap_pop (k, simi, idxi);< / div >
< div class = "line" > < a name = "l00748" > < / a > < span class = "lineno" > 748< / span >   minheap_push (k, simi, idxi, ip, j);< / div >
< div class = "line" > < a name = "l00749" > < / a > < span class = "lineno" > 749< / span >   }< / div >
< div class = "line" > < a name = "l00750" > < / a > < span class = "lineno" > 750< / span >   y_ += d;< / div >
< div class = "line" > < a name = "l00751" > < / a > < span class = "lineno" > 751< / span >   }< / div >
< div class = "line" > < a name = "l00752" > < / a > < span class = "lineno" > 752< / span >   minheap_reorder (k, simi, idxi);< / div >
< div class = "line" > < a name = "l00753" > < / a > < span class = "lineno" > 753< / span >   }< / div >
< div class = "line" > < a name = "l00754" > < / a > < span class = "lineno" > 754< / span >   < / div >
< div class = "line" > < a name = "l00755" > < / a > < span class = "lineno" > 755< / span >   }< / div >
< div class = "line" > < a name = "l00756" > < / a > < span class = "lineno" > 756< / span >   < / div >
< div class = "line" > < a name = "l00757" > < / a > < span class = "lineno" > 757< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > knn_L2sqr_sse (< / div >
< div class = "line" > < a name = "l00758" > < / a > < span class = "lineno" > 758< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00759" > < / a > < span class = "lineno" > 759< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00760" > < / a > < span class = "lineno" > 760< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l00761" > < / a > < span class = "lineno" > 761< / span >   float_maxheap_array_t * res)< / div >
< div class = "line" > < a name = "l00762" > < / a > < span class = "lineno" > 762< / span >   {< / div >
< div class = "line" > < a name = "l00763" > < / a > < span class = "lineno" > 763< / span >   < span class = "keywordtype" > size_t< / span > k = res-> k;< / div >
< div class = "line" > < a name = "l00764" > < / a > < span class = "lineno" > 764< / span >   < / div >
< div class = "line" > < a name = "l00765" > < / a > < span class = "lineno" > 765< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00766" > < / a > < span class = "lineno" > 766< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l00767" > < / a > < span class = "lineno" > 767< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x_ = x + i * d;< / div >
< div class = "line" > < a name = "l00768" > < / a > < span class = "lineno" > 768< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y_ = y;< / div >
< div class = "line" > < a name = "l00769" > < / a > < span class = "lineno" > 769< / span >   < span class = "keywordtype" > size_t< / span > j;< / div >
< div class = "line" > < a name = "l00770" > < / a > < span class = "lineno" > 770< / span >   < span class = "keywordtype" > float< / span > * __restrict simi = res-> get_val(i);< / div >
< div class = "line" > < a name = "l00771" > < / a > < span class = "lineno" > 771< / span >   < span class = "keywordtype" > long< / span > * __restrict idxi = res-> get_ids (i);< / div >
< div class = "line" > < a name = "l00772" > < / a > < span class = "lineno" > 772< / span >   < / div >
< div class = "line" > < a name = "l00773" > < / a > < span class = "lineno" > 773< / span >   maxheap_heapify (k, simi, idxi);< / div >
< div class = "line" > < a name = "l00774" > < / a > < span class = "lineno" > 774< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < ny; j++) {< / div >
< div class = "line" > < a name = "l00775" > < / a > < span class = "lineno" > 775< / span >   < span class = "keywordtype" > float< / span > disij = < a class = "code" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > fvec_L2sqr< / a > (x_, y_, d);< / div >
< div class = "line" > < a name = "l00776" > < / a > < span class = "lineno" > 776< / span >   < / div >
< div class = "line" > < a name = "l00777" > < / a > < span class = "lineno" > 777< / span >   < span class = "keywordflow" > if< / span > (disij < simi[0]) {< / div >
< div class = "line" > < a name = "l00778" > < / a > < span class = "lineno" > 778< / span >   maxheap_pop (k, simi, idxi);< / div >
< div class = "line" > < a name = "l00779" > < / a > < span class = "lineno" > 779< / span >   maxheap_push (k, simi, idxi, disij, j);< / div >
< div class = "line" > < a name = "l00780" > < / a > < span class = "lineno" > 780< / span >   }< / div >
< div class = "line" > < a name = "l00781" > < / a > < span class = "lineno" > 781< / span >   y_ += d;< / div >
< div class = "line" > < a name = "l00782" > < / a > < span class = "lineno" > 782< / span >   }< / div >
< div class = "line" > < a name = "l00783" > < / a > < span class = "lineno" > 783< / span >   maxheap_reorder (k, simi, idxi);< / div >
< div class = "line" > < a name = "l00784" > < / a > < span class = "lineno" > 784< / span >   }< / div >
< div class = "line" > < a name = "l00785" > < / a > < span class = "lineno" > 785< / span >   < / div >
< div class = "line" > < a name = "l00786" > < / a > < span class = "lineno" > 786< / span >   }< / div >
< div class = "line" > < a name = "l00787" > < / a > < span class = "lineno" > 787< / span >   < / div >
< div class = "line" > < a name = "l00788" > < / a > < span class = "lineno" > 788< / span >   < span class = "comment" > < / span > < / div >
< div class = "line" > < a name = "l00789" > < / a > < span class = "lineno" > 789< / span >   < span class = "comment" > /** Find the nearest neighbors for nx queries in a set of ny vectors */< / span > < / div >
< div class = "line" > < a name = "l00790" > < / a > < span class = "lineno" > 790< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > knn_inner_product_blas (< / div >
< div class = "line" > < a name = "l00791" > < / a > < span class = "lineno" > 791< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00792" > < / a > < span class = "lineno" > 792< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00793" > < / a > < span class = "lineno" > 793< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l00794" > < / a > < span class = "lineno" > 794< / span >   float_minheap_array_t * res)< / div >
< div class = "line" > < a name = "l00795" > < / a > < span class = "lineno" > 795< / span >   {< / div >
< div class = "line" > < a name = "l00796" > < / a > < span class = "lineno" > 796< / span >   res-> heapify ();< / div >
< div class = "line" > < a name = "l00797" > < / a > < span class = "lineno" > 797< / span >   < / div >
< div class = "line" > < a name = "l00798" > < / a > < span class = "lineno" > 798< / span >   < span class = "comment" > // BLAS does not like empty matrices< / span > < / div >
< div class = "line" > < a name = "l00799" > < / a > < span class = "lineno" > 799< / span >   < span class = "keywordflow" > if< / span > (nx == 0 || ny == 0) < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00800" > < / a > < span class = "lineno" > 800< / span >   < / div >
< div class = "line" > < a name = "l00801" > < / a > < span class = "lineno" > 801< / span >   < span class = "comment" > /* block sizes */< / span > < / div >
< div class = "line" > < a name = "l00802" > < / a > < span class = "lineno" > 802< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > bs_x = 4096, bs_y = 1024;< / div >
< div class = "line" > < a name = "l00803" > < / a > < span class = "lineno" > 803< / span >   < span class = "comment" > // const size_t bs_x = 16, bs_y = 16;< / span > < / div >
< div class = "line" > < a name = "l00804" > < / a > < span class = "lineno" > 804< / span >   < span class = "keywordtype" > float< / span > *ip_block = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [bs_x * bs_y];< / div >
< div class = "line" > < a name = "l00805" > < / a > < span class = "lineno" > 805< / span >   < / div >
< div class = "line" > < a name = "l00806" > < / a > < span class = "lineno" > 806< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i0 = 0; i0 < nx; i0 += bs_x) {< / div >
< div class = "line" > < a name = "l00807" > < / a > < span class = "lineno" > 807< / span >   < span class = "keywordtype" > size_t< / span > i1 = i0 + bs_x;< / div >
< div class = "line" > < a name = "l00808" > < / a > < span class = "lineno" > 808< / span >   < span class = "keywordflow" > if< / span > (i1 > nx) i1 = nx;< / div >
< div class = "line" > < a name = "l00809" > < / a > < span class = "lineno" > 809< / span >   < / div >
< div class = "line" > < a name = "l00810" > < / a > < span class = "lineno" > 810< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j0 = 0; j0 < ny; j0 += bs_y) {< / div >
< div class = "line" > < a name = "l00811" > < / a > < span class = "lineno" > 811< / span >   < span class = "keywordtype" > size_t< / span > j1 = j0 + bs_y;< / div >
< div class = "line" > < a name = "l00812" > < / a > < span class = "lineno" > 812< / span >   < span class = "keywordflow" > if< / span > (j1 > ny) j1 = ny;< / div >
< div class = "line" > < a name = "l00813" > < / a > < span class = "lineno" > 813< / span >   < span class = "comment" > /* compute the actual dot products */< / span > < / div >
< div class = "line" > < a name = "l00814" > < / a > < span class = "lineno" > 814< / span >   {< / div >
< div class = "line" > < a name = "l00815" > < / a > < span class = "lineno" > 815< / span >   < span class = "keywordtype" > float< / span > one = 1, zero = 0;< / div >
< div class = "line" > < a name = "l00816" > < / a > < span class = "lineno" > 816< / span >   FINTEGER nyi = j1 - j0, nxi = i1 - i0, di = d;< / div >
< div class = "line" > < a name = "l00817" > < / a > < span class = "lineno" > 817< / span >   sgemm_ (< span class = "stringliteral" > " Transpose" < / span > , < span class = "stringliteral" > " Not transpose" < / span > , & nyi, & nxi, & di, & one,< / div >
< div class = "line" > < a name = "l00818" > < / a > < span class = "lineno" > 818< / span >   y + j0 * d, & di,< / div >
< div class = "line" > < a name = "l00819" > < / a > < span class = "lineno" > 819< / span >   x + i0 * d, & di, & zero,< / div >
< div class = "line" > < a name = "l00820" > < / a > < span class = "lineno" > 820< / span >   ip_block, & nyi);< / div >
< div class = "line" > < a name = "l00821" > < / a > < span class = "lineno" > 821< / span >   }< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00822" > < / a > < span class = "lineno" > 822< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00823" > < / a > < span class = "lineno" > 823< / span >   < span class = "comment" > /* collect maxima */< / span > < / div >
< div class = "line" > < a name = "l00824" > < / a > < span class = "lineno" > 824< / span >   res-> addn (j1 - j0, ip_block, j0, i0, i1 - i0);< / div >
< div class = "line" > < a name = "l00825" > < / a > < span class = "lineno" > 825< / span >   }< / div >
< div class = "line" > < a name = "l00826" > < / a > < span class = "lineno" > 826< / span >   }< / div >
< div class = "line" > < a name = "l00827" > < / a > < span class = "lineno" > 827< / span >   < span class = "keyword" > delete< / span > [] ip_block;< / div >
< div class = "line" > < a name = "l00828" > < / a > < span class = "lineno" > 828< / span >   res-> reorder ();< / div >
< div class = "line" > < a name = "l00829" > < / a > < span class = "lineno" > 829< / span >   }< / div >
< div class = "line" > < a name = "l00830" > < / a > < span class = "lineno" > 830< / span >   < / div >
< div class = "line" > < a name = "l00831" > < / a > < span class = "lineno" > 831< / span >   < span class = "comment" > // distance correction is an operator that can be applied to transform< / span > < / div >
< div class = "line" > < a name = "l00832" > < / a > < span class = "lineno" > 832< / span >   < span class = "comment" > // the distances< / span > < / div >
< div class = "line" > < a name = "l00833" > < / a > < span class = "lineno" > 833< / span >   < span class = "keyword" > template< / span > < < span class = "keyword" > class< / span > DistanceCorrection> < / div >
< div class = "line" > < a name = "l00834" > < / a > < span class = "lineno" > 834< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > knn_L2sqr_blas (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00835" > < / a > < span class = "lineno" > 835< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00836" > < / a > < span class = "lineno" > 836< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l00837" > < / a > < span class = "lineno" > 837< / span >   float_maxheap_array_t * res,< / div >
< div class = "line" > < a name = "l00838" > < / a > < span class = "lineno" > 838< / span >   < span class = "keyword" > const< / span > DistanceCorrection & corr)< / div >
< div class = "line" > < a name = "l00839" > < / a > < span class = "lineno" > 839< / span >   {< / div >
< div class = "line" > < a name = "l00840" > < / a > < span class = "lineno" > 840< / span >   res-> heapify ();< / div >
< div class = "line" > < a name = "l00841" > < / a > < span class = "lineno" > 841< / span >   < / div >
< div class = "line" > < a name = "l00842" > < / a > < span class = "lineno" > 842< / span >   < span class = "comment" > // BLAS does not like empty matrices< / span > < / div >
< div class = "line" > < a name = "l00843" > < / a > < span class = "lineno" > 843< / span >   < span class = "keywordflow" > if< / span > (nx == 0 || ny == 0) < span class = "keywordflow" > return< / span > ;< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00844" > < / a > < span class = "lineno" > 844< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00845" > < / a > < span class = "lineno" > 845< / span >   < span class = "keywordtype" > size_t< / span > k = res-> k;< / div >
< div class = "line" > < a name = "l00846" > < / a > < span class = "lineno" > 846< / span >   < / div >
< div class = "line" > < a name = "l00847" > < / a > < span class = "lineno" > 847< / span >   < span class = "comment" > /* block sizes */< / span > < / div >
< div class = "line" > < a name = "l00848" > < / a > < span class = "lineno" > 848< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > bs_x = 4096, bs_y = 1024;< / div >
< div class = "line" > < a name = "l00849" > < / a > < span class = "lineno" > 849< / span >   < span class = "comment" > // const size_t bs_x = 16, bs_y = 16;< / span > < / div >
< div class = "line" > < a name = "l00850" > < / a > < span class = "lineno" > 850< / span >   < span class = "keywordtype" > float< / span > *ip_block = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [bs_x * bs_y];< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00851" > < / a > < span class = "lineno" > 851< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00852" > < / a > < span class = "lineno" > 852< / span >   < span class = "keywordtype" > float< / span > *x_norms = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [nx];< / div >
< div class = "line" > < a name = "l00853" > < / a > < span class = "lineno" > 853< / span >   fvec_norms_L2sqr (x_norms, x, d, nx);< / div >
< div class = "line" > < a name = "l00854" > < / a > < span class = "lineno" > 854< / span >   < / div >
< div class = "line" > < a name = "l00855" > < / a > < span class = "lineno" > 855< / span >   < span class = "keywordtype" > float< / span > *y_norms = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [ny];< / div >
< div class = "line" > < a name = "l00856" > < / a > < span class = "lineno" > 856< / span >   fvec_norms_L2sqr (y_norms, y, d, ny);< / div >
< div class = "line" > < a name = "l00857" > < / a > < span class = "lineno" > 857< / span >   < / div >
< div class = "line" > < a name = "l00858" > < / a > < span class = "lineno" > 858< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i0 = 0; i0 < nx; i0 += bs_x) {< / div >
< div class = "line" > < a name = "l00859" > < / a > < span class = "lineno" > 859< / span >   < span class = "keywordtype" > size_t< / span > i1 = i0 + bs_x;< / div >
< div class = "line" > < a name = "l00860" > < / a > < span class = "lineno" > 860< / span >   < span class = "keywordflow" > if< / span > (i1 > nx) i1 = nx;< / div >
< div class = "line" > < a name = "l00861" > < / a > < span class = "lineno" > 861< / span >   < / div >
< div class = "line" > < a name = "l00862" > < / a > < span class = "lineno" > 862< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j0 = 0; j0 < ny; j0 += bs_y) {< / div >
< div class = "line" > < a name = "l00863" > < / a > < span class = "lineno" > 863< / span >   < span class = "keywordtype" > size_t< / span > j1 = j0 + bs_y;< / div >
< div class = "line" > < a name = "l00864" > < / a > < span class = "lineno" > 864< / span >   < span class = "keywordflow" > if< / span > (j1 > ny) j1 = ny;< / div >
< div class = "line" > < a name = "l00865" > < / a > < span class = "lineno" > 865< / span >   < span class = "comment" > /* compute the actual dot products */< / span > < / div >
< div class = "line" > < a name = "l00866" > < / a > < span class = "lineno" > 866< / span >   {< / div >
< div class = "line" > < a name = "l00867" > < / a > < span class = "lineno" > 867< / span >   < span class = "keywordtype" > float< / span > one = 1, zero = 0;< / div >
< div class = "line" > < a name = "l00868" > < / a > < span class = "lineno" > 868< / span >   FINTEGER nyi = j1 - j0, nxi = i1 - i0, di = d;< / div >
< div class = "line" > < a name = "l00869" > < / a > < span class = "lineno" > 869< / span >   sgemm_ (< span class = "stringliteral" > " Transpose" < / span > , < span class = "stringliteral" > " Not transpose" < / span > , & nyi, & nxi, & di, & one,< / div >
< div class = "line" > < a name = "l00870" > < / a > < span class = "lineno" > 870< / span >   y + j0 * d, & di,< / div >
< div class = "line" > < a name = "l00871" > < / a > < span class = "lineno" > 871< / span >   x + i0 * d, & di, & zero,< / div >
< div class = "line" > < a name = "l00872" > < / a > < span class = "lineno" > 872< / span >   ip_block, & nyi);< / div >
< div class = "line" > < a name = "l00873" > < / a > < span class = "lineno" > 873< / span >   }< / div >
< div class = "line" > < a name = "l00874" > < / a > < span class = "lineno" > 874< / span >   < / div >
< div class = "line" > < a name = "l00875" > < / a > < span class = "lineno" > 875< / span >   < span class = "comment" > /* collect minima */< / span > < / div >
< div class = "line" > < a name = "l00876" > < / a > < span class = "lineno" > 876< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00877" > < / a > < span class = "lineno" > 877< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = i0; i < i1; i++) {< / div >
< div class = "line" > < a name = "l00878" > < / a > < span class = "lineno" > 878< / span >   < span class = "keywordtype" > float< / span > * __restrict simi = res-> get_val(i);< / div >
< div class = "line" > < a name = "l00879" > < / a > < span class = "lineno" > 879< / span >   < span class = "keywordtype" > long< / span > * __restrict idxi = res-> get_ids (i);< / div >
< div class = "line" > < a name = "l00880" > < / a > < span class = "lineno" > 880< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *ip_line = ip_block + (i - i0) * (j1 - j0);< / div >
< div class = "line" > < a name = "l00881" > < / a > < span class = "lineno" > 881< / span >   < / div >
< div class = "line" > < a name = "l00882" > < / a > < span class = "lineno" > 882< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = j0; j < j1; j++) {< / div >
< div class = "line" > < a name = "l00883" > < / a > < span class = "lineno" > 883< / span >   < span class = "keywordtype" > float< / span > ip = *ip_line++;< / div >
< div class = "line" > < a name = "l00884" > < / a > < span class = "lineno" > 884< / span >   < span class = "keywordtype" > float< / span > dis = x_norms[i] + y_norms[j] - 2 * ip;< / div >
< div class = "line" > < a name = "l00885" > < / a > < span class = "lineno" > 885< / span >   < / div >
< div class = "line" > < a name = "l00886" > < / a > < span class = "lineno" > 886< / span >   dis = corr (dis, i, j);< / div >
< div class = "line" > < a name = "l00887" > < / a > < span class = "lineno" > 887< / span >   < / div >
< div class = "line" > < a name = "l00888" > < / a > < span class = "lineno" > 888< / span >   < span class = "keywordflow" > if< / span > (dis < simi[0]) {< / div >
< div class = "line" > < a name = "l00889" > < / a > < span class = "lineno" > 889< / span >   maxheap_pop (k, simi, idxi);< / div >
< div class = "line" > < a name = "l00890" > < / a > < span class = "lineno" > 890< / span >   maxheap_push (k, simi, idxi, dis, j);< / div >
< div class = "line" > < a name = "l00891" > < / a > < span class = "lineno" > 891< / span >   }< / div >
< div class = "line" > < a name = "l00892" > < / a > < span class = "lineno" > 892< / span >   }< / div >
< div class = "line" > < a name = "l00893" > < / a > < span class = "lineno" > 893< / span >   }< / div >
< div class = "line" > < a name = "l00894" > < / a > < span class = "lineno" > 894< / span >   }< / div >
< div class = "line" > < a name = "l00895" > < / a > < span class = "lineno" > 895< / span >   }< / div >
< div class = "line" > < a name = "l00896" > < / a > < span class = "lineno" > 896< / span >   res-> reorder ();< / div >
< div class = "line" > < a name = "l00897" > < / a > < span class = "lineno" > 897< / span >   < / div >
< div class = "line" > < a name = "l00898" > < / a > < span class = "lineno" > 898< / span >   < span class = "keyword" > delete< / span > [] ip_block;< / div >
< div class = "line" > < a name = "l00899" > < / a > < span class = "lineno" > 899< / span >   < span class = "keyword" > delete< / span > [] x_norms;< / div >
< div class = "line" > < a name = "l00900" > < / a > < span class = "lineno" > 900< / span >   < span class = "keyword" > delete< / span > [] y_norms;< / div >
< div class = "line" > < a name = "l00901" > < / a > < span class = "lineno" > 901< / span >   }< / div >
< div class = "line" > < a name = "l00902" > < / a > < span class = "lineno" > 902< / span >   < / div >
< div class = "line" > < a name = "l00903" > < / a > < span class = "lineno" > 903< / span >   < / div >
< div class = "line" > < a name = "l00904" > < / a > < span class = "lineno" > 904< / span >   < / div >
< div class = "line" > < a name = "l00905" > < / a > < span class = "lineno" > 905< / span >   < / div >
< div class = "line" > < a name = "l00906" > < / a > < span class = "lineno" > 906< / span >   < / div >
< div class = "line" > < a name = "l00907" > < / a > < span class = "lineno" > 907< / span >   < / div >
< div class = "line" > < a name = "l00908" > < / a > < span class = "lineno" > 908< / span >   < / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00909" > < / a > < span class = "lineno" > 909< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00910" > < / a > < span class = "lineno" > 910< / span >   < / div >
< div class = "line" > < a name = "l00911" > < / a > < span class = "lineno" > 911< / span >   < span class = "comment" > /*******************************************************< / span > < / div >
< div class = "line" > < a name = "l00912" > < / a > < span class = "lineno" > 912< / span >   < span class = "comment" > * KNN driver functions< / span > < / div >
< div class = "line" > < a name = "l00913" > < / a > < span class = "lineno" > 913< / span >   < span class = "comment" > *******************************************************/< / span > < / div >
< div class = "line" > < a name = "l00914" > < / a > < span class = "lineno" > 914< / span >   < / div >
< div class = "line" > < a name = "l00915" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a880c7318971f866267a86945aaa61b17" > 915< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#a880c7318971f866267a86945aaa61b17" > knn_inner_product< / a > (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00916" > < / a > < span class = "lineno" > 916< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00917" > < / a > < span class = "lineno" > 917< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l00918" > < / a > < span class = "lineno" > 918< / span >   < a class = "code" href = "structfaiss_1_1HeapArray.html" > float_minheap_array_t< / a > * res)< / div >
< div class = "line" > < a name = "l00919" > < / a > < span class = "lineno" > 919< / span >   {< / div >
< div class = "line" > < a name = "l00920" > < / a > < span class = "lineno" > 920< / span >   < span class = "keywordflow" > if< / span > (d % 4 == 0 & & nx < 20) {< / div >
< div class = "line" > < a name = "l00921" > < / a > < span class = "lineno" > 921< / span >   knn_inner_product_sse (x, y, d, nx, ny, res);< / div >
< div class = "line" > < a name = "l00922" > < / a > < span class = "lineno" > 922< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00923" > < / a > < span class = "lineno" > 923< / span >   knn_inner_product_blas (x, y, d, nx, ny, res);< / div >
< div class = "line" > < a name = "l00924" > < / a > < span class = "lineno" > 924< / span >   }< / div >
< div class = "line" > < a name = "l00925" > < / a > < span class = "lineno" > 925< / span >   }< / div >
< div class = "line" > < a name = "l00926" > < / a > < span class = "lineno" > 926< / span >   < / div >
< div class = "line" > < a name = "l00927" > < / a > < span class = "lineno" > 927< / span >   < / div >
< div class = "line" > < a name = "l00928" > < / a > < span class = "lineno" > 928< / span >   < / div >
< div class = "line" > < a name = "l00929" > < / a > < span class = "lineno" > < a class = "line" href = "structfaiss_1_1NopDistanceCorrection.html" > 929< / a > < / span >   < span class = "keyword" > struct < / span > < a class = "code" href = "structfaiss_1_1NopDistanceCorrection.html" > NopDistanceCorrection< / a > {< / div >
< div class = "line" > < a name = "l00930" > < / a > < span class = "lineno" > 930< / span >   < span class = "keywordtype" > float< / span > operator()(< span class = "keywordtype" > float< / span > dis, < span class = "keywordtype" > size_t< / span > qno, < span class = "keywordtype" > size_t< / span > bno)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00931" > < / a > < span class = "lineno" > 931< / span >   < span class = "keywordflow" > return< / span > dis;< / div >
< div class = "line" > < a name = "l00932" > < / a > < span class = "lineno" > 932< / span >   }< / div >
< div class = "line" > < a name = "l00933" > < / a > < span class = "lineno" > 933< / span >   };< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00934" > < / a > < span class = "lineno" > 934< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00935" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a2f803e3d3b07cfab63699c89de161237" > 935< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#a2f803e3d3b07cfab63699c89de161237" > knn_L2sqr< / a > (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00936" > < / a > < span class = "lineno" > 936< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00937" > < / a > < span class = "lineno" > 937< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l00938" > < / a > < span class = "lineno" > 938< / span >   < a class = "code" href = "structfaiss_1_1HeapArray.html" > float_maxheap_array_t< / a > * res)< / div >
< div class = "line" > < a name = "l00939" > < / a > < span class = "lineno" > 939< / span >   {< / div >
< div class = "line" > < a name = "l00940" > < / a > < span class = "lineno" > 940< / span >   < span class = "keywordflow" > if< / span > (d % 4 == 0 & & nx < 20) {< / div >
< div class = "line" > < a name = "l00941" > < / a > < span class = "lineno" > 941< / span >   knn_L2sqr_sse (x, y, d, nx, ny, res);< / div >
< div class = "line" > < a name = "l00942" > < / a > < span class = "lineno" > 942< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00943" > < / a > < span class = "lineno" > 943< / span >   < a class = "code" href = "structfaiss_1_1NopDistanceCorrection.html" > NopDistanceCorrection< / a > nop;< / div >
< div class = "line" > < a name = "l00944" > < / a > < span class = "lineno" > 944< / span >   knn_L2sqr_blas (x, y, d, nx, ny, res, nop);< / div >
< div class = "line" > < a name = "l00945" > < / a > < span class = "lineno" > 945< / span >   }< / div >
< div class = "line" > < a name = "l00946" > < / a > < span class = "lineno" > 946< / span >   }< / div >
< div class = "line" > < a name = "l00947" > < / a > < span class = "lineno" > 947< / span >   < / div >
< div class = "line" > < a name = "l00948" > < / a > < span class = "lineno" > < a class = "line" href = "structfaiss_1_1BaseShiftDistanceCorrection.html" > 948< / a > < / span >   < span class = "keyword" > struct < / span > < a class = "code" href = "structfaiss_1_1BaseShiftDistanceCorrection.html" > BaseShiftDistanceCorrection< / a > {< / div >
< div class = "line" > < a name = "l00949" > < / a > < span class = "lineno" > 949< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *base_shift;< / div >
< div class = "line" > < a name = "l00950" > < / a > < span class = "lineno" > 950< / span >   < span class = "keywordtype" > float< / span > operator()(< span class = "keywordtype" > float< / span > dis, < span class = "keywordtype" > size_t< / span > qno, < span class = "keywordtype" > size_t< / span > bno)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00951" > < / a > < span class = "lineno" > 951< / span >   < span class = "keywordflow" > return< / span > dis - base_shift[bno];< / div >
< div class = "line" > < a name = "l00952" > < / a > < span class = "lineno" > 952< / span >   }< / div >
< div class = "line" > < a name = "l00953" > < / a > < span class = "lineno" > 953< / span >   };< / div >
< div class = "line" > < a name = "l00954" > < / a > < span class = "lineno" > 954< / span >   < / div >
< div class = "line" > < a name = "l00955" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a5eb1701e46123827966f2a56da893d1d" > 955< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#a5eb1701e46123827966f2a56da893d1d" > knn_L2sqr_base_shift< / a > (< / div >
< div class = "line" > < a name = "l00956" > < / a > < span class = "lineno" > 956< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00957" > < / a > < span class = "lineno" > 957< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00958" > < / a > < span class = "lineno" > 958< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l00959" > < / a > < span class = "lineno" > 959< / span >   < a class = "code" href = "structfaiss_1_1HeapArray.html" > float_maxheap_array_t< / a > * res,< / div >
< div class = "line" > < a name = "l00960" > < / a > < span class = "lineno" > 960< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *base_shift)< / div >
< div class = "line" > < a name = "l00961" > < / a > < span class = "lineno" > 961< / span >   {< / div >
< div class = "line" > < a name = "l00962" > < / a > < span class = "lineno" > 962< / span >   < a class = "code" href = "structfaiss_1_1BaseShiftDistanceCorrection.html" > BaseShiftDistanceCorrection< / a > corr = {base_shift};< / div >
< div class = "line" > < a name = "l00963" > < / a > < span class = "lineno" > 963< / span >   knn_L2sqr_blas (x, y, d, nx, ny, res, corr);< / div >
< div class = "line" > < a name = "l00964" > < / a > < span class = "lineno" > 964< / span >   }< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00965" > < / a > < span class = "lineno" > 965< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00966" > < / a > < span class = "lineno" > 966< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00967" > < / a > < span class = "lineno" > 967< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00968" > < / a > < span class = "lineno" > 968< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l00969" > < / a > < span class = "lineno" > 969< / span >   < span class = "comment" > * compute a subset of distances< / span > < / div >
< div class = "line" > < a name = "l00970" > < / a > < span class = "lineno" > 970< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
< div class = "line" > < a name = "l00971" > < / a > < span class = "lineno" > 971< / span >   < / div >
< div class = "line" > < a name = "l00972" > < / a > < span class = "lineno" > 972< / span >   < span class = "comment" > /* compute the inner product between x and a subset y of ny vectors,< / span > < / div >
< div class = "line" > < a name = "l00973" > < / a > < span class = "lineno" > 973< / span >   < span class = "comment" > whose indices are given by idy. */< / span > < / div >
< div class = "line" > < a name = "l00974" > < / a > < span class = "lineno" > 974< / span >   < span class = "keywordtype" > void< / span > fvec_inner_products_by_idx (< span class = "keywordtype" > float< / span > * __restrict ip,< / div >
< div class = "line" > < a name = "l00975" > < / a > < span class = "lineno" > 975< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00976" > < / a > < span class = "lineno" > 976< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00977" > < / a > < span class = "lineno" > 977< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * __restrict ids, < span class = "comment" > /* for y vecs */< / span > < / div >
< div class = "line" > < a name = "l00978" > < / a > < span class = "lineno" > 978< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny)< / div >
< div class = "line" > < a name = "l00979" > < / a > < span class = "lineno" > 979< / span >   {< / div >
< div class = "line" > < a name = "l00980" > < / a > < span class = "lineno" > 980< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00981" > < / a > < span class = "lineno" > 981< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < nx; j++) {< / div >
< div class = "line" > < a name = "l00982" > < / a > < span class = "lineno" > 982< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * __restrict idsj = ids + j * ny;< / div >
< div class = "line" > < a name = "l00983" > < / a > < span class = "lineno" > 983< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * xj = x + j * d;< / div >
< div class = "line" > < a name = "l00984" > < / a > < span class = "lineno" > 984< / span >   < span class = "keywordtype" > float< / span > * __restrict ipj = ip + j * ny;< / div >
< div class = "line" > < a name = "l00985" > < / a > < span class = "lineno" > 985< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < ny; i++) {< / div >
< div class = "line" > < a name = "l00986" > < / a > < span class = "lineno" > 986< / span >   < span class = "keywordflow" > if< / span > (idsj[i] < 0)< / div >
< div class = "line" > < a name = "l00987" > < / a > < span class = "lineno" > 987< / span >   < span class = "keywordflow" > continue< / span > ;< / div >
< div class = "line" > < a name = "l00988" > < / a > < span class = "lineno" > 988< / span >   ipj[i] = fvec_inner_product (xj, y + d * idsj[i], d);< / div >
< div class = "line" > < a name = "l00989" > < / a > < span class = "lineno" > 989< / span >   }< / div >
< div class = "line" > < a name = "l00990" > < / a > < span class = "lineno" > 990< / span >   }< / div >
< div class = "line" > < a name = "l00991" > < / a > < span class = "lineno" > 991< / span >   }< / div >
< div class = "line" > < a name = "l00992" > < / a > < span class = "lineno" > 992< / span >   < / div >
< div class = "line" > < a name = "l00993" > < / a > < span class = "lineno" > 993< / span >   < span class = "comment" > /* compute the inner product between x and a subset y of ny vectors,< / span > < / div >
< div class = "line" > < a name = "l00994" > < / a > < span class = "lineno" > 994< / span >   < span class = "comment" > whose indices are given by idy. */< / span > < / div >
< div class = "line" > < a name = "l00995" > < / a > < span class = "lineno" > 995< / span >   < span class = "keywordtype" > void< / span > fvec_L2sqr_by_idx (< span class = "keywordtype" > float< / span > * __restrict dis,< / div >
< div class = "line" > < a name = "l00996" > < / a > < span class = "lineno" > 996< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00997" > < / a > < span class = "lineno" > 997< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l00998" > < / a > < span class = "lineno" > 998< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * __restrict ids, < span class = "comment" > /* ids of y vecs */< / span > < / div >
< div class = "line" > < a name = "l00999" > < / a > < span class = "lineno" > 999< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny)< / div >
< div class = "line" > < a name = "l01000" > < / a > < span class = "lineno" > 1000< / span >   {< / div >
< div class = "line" > < a name = "l01001" > < / a > < span class = "lineno" > 1001< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01002" > < / a > < span class = "lineno" > 1002< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < nx; j++) {< / div >
< div class = "line" > < a name = "l01003" > < / a > < span class = "lineno" > 1003< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * __restrict idsj = ids + j * ny;< / div >
< div class = "line" > < a name = "l01004" > < / a > < span class = "lineno" > 1004< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * xj = x + j * d;< / div >
< div class = "line" > < a name = "l01005" > < / a > < span class = "lineno" > 1005< / span >   < span class = "keywordtype" > float< / span > * __restrict disj = dis + j * ny;< / div >
< div class = "line" > < a name = "l01006" > < / a > < span class = "lineno" > 1006< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < ny; i++) {< / div >
< div class = "line" > < a name = "l01007" > < / a > < span class = "lineno" > 1007< / span >   < span class = "keywordflow" > if< / span > (idsj[i] < 0)< / div >
< div class = "line" > < a name = "l01008" > < / a > < span class = "lineno" > 1008< / span >   < span class = "keywordflow" > continue< / span > ;< / div >
< div class = "line" > < a name = "l01009" > < / a > < span class = "lineno" > 1009< / span >   disj[i] = < a class = "code" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > fvec_L2sqr< / a > (xj, y + d * idsj[i], d);< / div >
< div class = "line" > < a name = "l01010" > < / a > < span class = "lineno" > 1010< / span >   }< / div >
< div class = "line" > < a name = "l01011" > < / a > < span class = "lineno" > 1011< / span >   }< / div >
< div class = "line" > < a name = "l01012" > < / a > < span class = "lineno" > 1012< / span >   }< / div >
< div class = "line" > < a name = "l01013" > < / a > < span class = "lineno" > 1013< / span >   < / div >
< div class = "line" > < a name = "l01014" > < / a > < span class = "lineno" > 1014< / span >   < / div >
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< div class = "line" > < a name = "l01015" > < / a > < span class = "lineno" > 1015< / span >   < / div >
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< div class = "line" > < a name = "l01016" > < / a > < span class = "lineno" > 1016< / span >   < / div >
< div class = "line" > < a name = "l01017" > < / a > < span class = "lineno" > 1017< / span >   < / div >
< div class = "line" > < a name = "l01018" > < / a > < span class = "lineno" > 1018< / span >   < span class = "comment" > /* Find the nearest neighbors for nx queries in a set of ny vectors< / span > < / div >
< div class = "line" > < a name = "l01019" > < / a > < span class = "lineno" > 1019< / span >   < span class = "comment" > indexed by ids. May be useful for re-ranking a pre-selected vector list */< / span > < / div >
< div class = "line" > < a name = "l01020" > < / a > < span class = "lineno" > 1020< / span >   < span class = "keywordtype" > void< / span > knn_inner_products_by_idx (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l01021" > < / a > < span class = "lineno" > 1021< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l01022" > < / a > < span class = "lineno" > 1022< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * ids,< / div >
< div class = "line" > < a name = "l01023" > < / a > < span class = "lineno" > 1023< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l01024" > < / a > < span class = "lineno" > 1024< / span >   float_minheap_array_t * res)< / div >
< div class = "line" > < a name = "l01025" > < / a > < span class = "lineno" > 1025< / span >   {< / div >
< div class = "line" > < a name = "l01026" > < / a > < span class = "lineno" > 1026< / span >   < span class = "keywordtype" > size_t< / span > k = res-> k;< / div >
< div class = "line" > < a name = "l01027" > < / a > < span class = "lineno" > 1027< / span >   < / div >
< div class = "line" > < a name = "l01028" > < / a > < span class = "lineno" > 1028< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01029" > < / a > < span class = "lineno" > 1029< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l01030" > < / a > < span class = "lineno" > 1030< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x_ = x + i * d;< / div >
< div class = "line" > < a name = "l01031" > < / a > < span class = "lineno" > 1031< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * idsi = ids + i * ny;< / div >
< div class = "line" > < a name = "l01032" > < / a > < span class = "lineno" > 1032< / span >   < span class = "keywordtype" > size_t< / span > j;< / div >
< div class = "line" > < a name = "l01033" > < / a > < span class = "lineno" > 1033< / span >   < span class = "keywordtype" > float< / span > * __restrict simi = res-> get_val(i);< / div >
< div class = "line" > < a name = "l01034" > < / a > < span class = "lineno" > 1034< / span >   < span class = "keywordtype" > long< / span > * __restrict idxi = res-> get_ids (i);< / div >
< div class = "line" > < a name = "l01035" > < / a > < span class = "lineno" > 1035< / span >   minheap_heapify (k, simi, idxi);< / div >
< div class = "line" > < a name = "l01036" > < / a > < span class = "lineno" > 1036< / span >   < / div >
< div class = "line" > < a name = "l01037" > < / a > < span class = "lineno" > 1037< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < ny; j++) {< / div >
< div class = "line" > < a name = "l01038" > < / a > < span class = "lineno" > 1038< / span >   < span class = "keywordflow" > if< / span > (idsi[j] < 0) < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l01039" > < / a > < span class = "lineno" > 1039< / span >   < span class = "keywordtype" > float< / span > ip = fvec_inner_product (x_, y + d * idsi[j], d);< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01040" > < / a > < span class = "lineno" > 1040< / span >   < / div >
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< div class = "line" > < a name = "l01041" > < / a > < span class = "lineno" > 1041< / span >   < span class = "keywordflow" > if< / span > (ip > simi[0]) {< / div >
< div class = "line" > < a name = "l01042" > < / a > < span class = "lineno" > 1042< / span >   minheap_pop (k, simi, idxi);< / div >
< div class = "line" > < a name = "l01043" > < / a > < span class = "lineno" > 1043< / span >   minheap_push (k, simi, idxi, ip, idsi[j]);< / div >
< div class = "line" > < a name = "l01044" > < / a > < span class = "lineno" > 1044< / span >   }< / div >
< div class = "line" > < a name = "l01045" > < / a > < span class = "lineno" > 1045< / span >   }< / div >
< div class = "line" > < a name = "l01046" > < / a > < span class = "lineno" > 1046< / span >   minheap_reorder (k, simi, idxi);< / div >
< div class = "line" > < a name = "l01047" > < / a > < span class = "lineno" > 1047< / span >   }< / div >
< div class = "line" > < a name = "l01048" > < / a > < span class = "lineno" > 1048< / span >   < / div >
< div class = "line" > < a name = "l01049" > < / a > < span class = "lineno" > 1049< / span >   }< / div >
< div class = "line" > < a name = "l01050" > < / a > < span class = "lineno" > 1050< / span >   < / div >
< div class = "line" > < a name = "l01051" > < / a > < span class = "lineno" > 1051< / span >   < span class = "keywordtype" > void< / span > knn_L2sqr_by_idx (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l01052" > < / a > < span class = "lineno" > 1052< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l01053" > < / a > < span class = "lineno" > 1053< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * __restrict ids,< / div >
< div class = "line" > < a name = "l01054" > < / a > < span class = "lineno" > 1054< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l01055" > < / a > < span class = "lineno" > 1055< / span >   float_maxheap_array_t * res)< / div >
< div class = "line" > < a name = "l01056" > < / a > < span class = "lineno" > 1056< / span >   {< / div >
< div class = "line" > < a name = "l01057" > < / a > < span class = "lineno" > 1057< / span >   < span class = "keywordtype" > size_t< / span > k = res-> k;< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01058" > < / a > < span class = "lineno" > 1058< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01059" > < / a > < span class = "lineno" > 1059< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01060" > < / a > < span class = "lineno" > 1060< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l01061" > < / a > < span class = "lineno" > 1061< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x_ = x + i * d;< / div >
< div class = "line" > < a name = "l01062" > < / a > < span class = "lineno" > 1062< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > * __restrict idsi = ids + i * ny;< / div >
< div class = "line" > < a name = "l01063" > < / a > < span class = "lineno" > 1063< / span >   < span class = "keywordtype" > float< / span > * __restrict simi = res-> get_val(i);< / div >
< div class = "line" > < a name = "l01064" > < / a > < span class = "lineno" > 1064< / span >   < span class = "keywordtype" > long< / span > * __restrict idxi = res-> get_ids (i);< / div >
< div class = "line" > < a name = "l01065" > < / a > < span class = "lineno" > 1065< / span >   maxheap_heapify (res-> k, simi, idxi);< / div >
< div class = "line" > < a name = "l01066" > < / a > < span class = "lineno" > 1066< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < ny; j++) {< / div >
< div class = "line" > < a name = "l01067" > < / a > < span class = "lineno" > 1067< / span >   < span class = "keywordtype" > float< / span > disij = < a class = "code" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > fvec_L2sqr< / a > (x_, y + d * idsi[j], d);< / div >
< div class = "line" > < a name = "l01068" > < / a > < span class = "lineno" > 1068< / span >   < / div >
< div class = "line" > < a name = "l01069" > < / a > < span class = "lineno" > 1069< / span >   < span class = "keywordflow" > if< / span > (disij < simi[0]) {< / div >
< div class = "line" > < a name = "l01070" > < / a > < span class = "lineno" > 1070< / span >   maxheap_pop (k, simi, idxi);< / div >
< div class = "line" > < a name = "l01071" > < / a > < span class = "lineno" > 1071< / span >   maxheap_push (k, simi, idxi, disij, idsi[j]);< / div >
< div class = "line" > < a name = "l01072" > < / a > < span class = "lineno" > 1072< / span >   }< / div >
< div class = "line" > < a name = "l01073" > < / a > < span class = "lineno" > 1073< / span >   }< / div >
< div class = "line" > < a name = "l01074" > < / a > < span class = "lineno" > 1074< / span >   maxheap_reorder (res-> k, simi, idxi);< / div >
< div class = "line" > < a name = "l01075" > < / a > < span class = "lineno" > 1075< / span >   }< / div >
< div class = "line" > < a name = "l01076" > < / a > < span class = "lineno" > 1076< / span >   < / div >
< div class = "line" > < a name = "l01077" > < / a > < span class = "lineno" > 1077< / span >   }< / div >
< div class = "line" > < a name = "l01078" > < / a > < span class = "lineno" > 1078< / span >   < / div >
< div class = "line" > < a name = "l01079" > < / a > < span class = "lineno" > 1079< / span >   < / div >
< div class = "line" > < a name = "l01080" > < / a > < span class = "lineno" > 1080< / span >   < / div >
< div class = "line" > < a name = "l01081" > < / a > < span class = "lineno" > 1081< / span >   < / div >
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< div class = "line" > < a name = "l01082" > < / a > < span class = "lineno" > 1082< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01083" > < / a > < span class = "lineno" > 1083< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l01084" > < / a > < span class = "lineno" > 1084< / span >   < span class = "comment" > * Range search< / span > < / div >
< div class = "line" > < a name = "l01085" > < / a > < span class = "lineno" > 1085< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
< div class = "line" > < a name = "l01086" > < / a > < span class = "lineno" > 1086< / span >   < span class = "comment" > < / span > < / div >
< div class = "line" > < a name = "l01087" > < / a > < span class = "lineno" > 1087< / span >   < span class = "comment" > /** Find the nearest neighbors for nx queries in a set of ny vectors< / span > < / div >
< div class = "line" > < a name = "l01088" > < / a > < span class = "lineno" > 1088< / span >   < span class = "comment" > * compute_l2 = compute pairwise squared L2 distance rather than inner prod< / span > < / div >
< div class = "line" > < a name = "l01089" > < / a > < span class = "lineno" > 1089< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l01090" > < / a > < span class = "lineno" > 1090< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > bool< / span > compute_l2> < / div >
< div class = "line" > < a name = "l01091" > < / a > < span class = "lineno" > 1091< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > range_search_blas (< / div >
< div class = "line" > < a name = "l01092" > < / a > < span class = "lineno" > 1092< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l01093" > < / a > < span class = "lineno" > 1093< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l01094" > < / a > < span class = "lineno" > 1094< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l01095" > < / a > < span class = "lineno" > 1095< / span >   < span class = "keywordtype" > float< / span > radius,< / div >
< div class = "line" > < a name = "l01096" > < / a > < span class = "lineno" > 1096< / span >   RangeSearchResult *result)< / div >
< div class = "line" > < a name = "l01097" > < / a > < span class = "lineno" > 1097< / span >   {< / div >
< div class = "line" > < a name = "l01098" > < / a > < span class = "lineno" > 1098< / span >   < / div >
< div class = "line" > < a name = "l01099" > < / a > < span class = "lineno" > 1099< / span >   < span class = "comment" > // BLAS does not like empty matrices< / span > < / div >
< div class = "line" > < a name = "l01100" > < / a > < span class = "lineno" > 1100< / span >   < span class = "keywordflow" > if< / span > (nx == 0 || ny == 0) < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l01101" > < / a > < span class = "lineno" > 1101< / span >   < / div >
< div class = "line" > < a name = "l01102" > < / a > < span class = "lineno" > 1102< / span >   < span class = "comment" > /* block sizes */< / span > < / div >
< div class = "line" > < a name = "l01103" > < / a > < span class = "lineno" > 1103< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > bs_x = 4096, bs_y = 1024;< / div >
< div class = "line" > < a name = "l01104" > < / a > < span class = "lineno" > 1104< / span >   < span class = "comment" > // const size_t bs_x = 16, bs_y = 16;< / span > < / div >
< div class = "line" > < a name = "l01105" > < / a > < span class = "lineno" > 1105< / span >   < span class = "keywordtype" > float< / span > *ip_block = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [bs_x * bs_y];< / div >
< div class = "line" > < a name = "l01106" > < / a > < span class = "lineno" > 1106< / span >   < / div >
< div class = "line" > < a name = "l01107" > < / a > < span class = "lineno" > 1107< / span >   < span class = "keywordtype" > float< / span > *x_norms = < span class = "keyword" > nullptr< / span > , *y_norms = < span class = "keyword" > nullptr< / span > ;< / div >
< div class = "line" > < a name = "l01108" > < / a > < span class = "lineno" > 1108< / span >   < / div >
< div class = "line" > < a name = "l01109" > < / a > < span class = "lineno" > 1109< / span >   < span class = "keywordflow" > if< / span > (compute_l2) {< / div >
< div class = "line" > < a name = "l01110" > < / a > < span class = "lineno" > 1110< / span >   x_norms = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [nx];< / div >
< div class = "line" > < a name = "l01111" > < / a > < span class = "lineno" > 1111< / span >   fvec_norms_L2sqr (x_norms, x, d, nx);< / div >
< div class = "line" > < a name = "l01112" > < / a > < span class = "lineno" > 1112< / span >   y_norms = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [ny];< / div >
< div class = "line" > < a name = "l01113" > < / a > < span class = "lineno" > 1113< / span >   fvec_norms_L2sqr (y_norms, y, d, ny);< / div >
< div class = "line" > < a name = "l01114" > < / a > < span class = "lineno" > 1114< / span >   }< / div >
< div class = "line" > < a name = "l01115" > < / a > < span class = "lineno" > 1115< / span >   < / div >
< div class = "line" > < a name = "l01116" > < / a > < span class = "lineno" > 1116< / span >   std::vector < RangeSearchPartialResult *> partial_results;< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01117" > < / a > < span class = "lineno" > 1117< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01118" > < / a > < span class = "lineno" > 1118< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j0 = 0; j0 < ny; j0 += bs_y) {< / div >
< div class = "line" > < a name = "l01119" > < / a > < span class = "lineno" > 1119< / span >   < span class = "keywordtype" > size_t< / span > j1 = j0 + bs_y;< / div >
< div class = "line" > < a name = "l01120" > < / a > < span class = "lineno" > 1120< / span >   < span class = "keywordflow" > if< / span > (j1 > ny) j1 = ny;< / div >
< div class = "line" > < a name = "l01121" > < / a > < span class = "lineno" > 1121< / span >   RangeSearchPartialResult * pres = < span class = "keyword" > new< / span > RangeSearchPartialResult (result);< / div >
< div class = "line" > < a name = "l01122" > < / a > < span class = "lineno" > 1122< / span >   partial_results.push_back (pres);< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01123" > < / a > < span class = "lineno" > 1123< / span >   < / div >
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< div class = "line" > < a name = "l01124" > < / a > < span class = "lineno" > 1124< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i0 = 0; i0 < nx; i0 += bs_x) {< / div >
< div class = "line" > < a name = "l01125" > < / a > < span class = "lineno" > 1125< / span >   < span class = "keywordtype" > size_t< / span > i1 = i0 + bs_x;< / div >
< div class = "line" > < a name = "l01126" > < / a > < span class = "lineno" > 1126< / span >   < span class = "keywordflow" > if< / span > (i1 > nx) i1 = nx;< / div >
< div class = "line" > < a name = "l01127" > < / a > < span class = "lineno" > 1127< / span >   < / div >
< div class = "line" > < a name = "l01128" > < / a > < span class = "lineno" > 1128< / span >   < span class = "comment" > /* compute the actual dot products */< / span > < / div >
< div class = "line" > < a name = "l01129" > < / a > < span class = "lineno" > 1129< / span >   {< / div >
< div class = "line" > < a name = "l01130" > < / a > < span class = "lineno" > 1130< / span >   < span class = "keywordtype" > float< / span > one = 1, zero = 0;< / div >
< div class = "line" > < a name = "l01131" > < / a > < span class = "lineno" > 1131< / span >   FINTEGER nyi = j1 - j0, nxi = i1 - i0, di = d;< / div >
< div class = "line" > < a name = "l01132" > < / a > < span class = "lineno" > 1132< / span >   sgemm_ (< span class = "stringliteral" > " Transpose" < / span > , < span class = "stringliteral" > " Not transpose" < / span > , & nyi, & nxi, & di, & one,< / div >
< div class = "line" > < a name = "l01133" > < / a > < span class = "lineno" > 1133< / span >   y + j0 * d, & di,< / div >
< div class = "line" > < a name = "l01134" > < / a > < span class = "lineno" > 1134< / span >   x + i0 * d, & di, & zero,< / div >
< div class = "line" > < a name = "l01135" > < / a > < span class = "lineno" > 1135< / span >   ip_block, & nyi);< / div >
< div class = "line" > < a name = "l01136" > < / a > < span class = "lineno" > 1136< / span >   }< / div >
< div class = "line" > < a name = "l01137" > < / a > < span class = "lineno" > 1137< / span >   < / div >
< div class = "line" > < a name = "l01138" > < / a > < span class = "lineno" > 1138< / span >   < / div >
< div class = "line" > < a name = "l01139" > < / a > < span class = "lineno" > 1139< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = i0; i < i1; i++) {< / div >
< div class = "line" > < a name = "l01140" > < / a > < span class = "lineno" > 1140< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *ip_line = ip_block + (i - i0) * (j1 - j0);< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01141" > < / a > < span class = "lineno" > 1141< / span >   < / div >
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< div class = "line" > < a name = "l01142" > < / a > < span class = "lineno" > 1142< / span >   RangeSearchPartialResult::QueryResult & qres =< / div >
< div class = "line" > < a name = "l01143" > < / a > < span class = "lineno" > 1143< / span >   pres-> new_result (i);< / div >
< div class = "line" > < a name = "l01144" > < / a > < span class = "lineno" > 1144< / span >   < / div >
< div class = "line" > < a name = "l01145" > < / a > < span class = "lineno" > 1145< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = j0; j < j1; j++) {< / div >
< div class = "line" > < a name = "l01146" > < / a > < span class = "lineno" > 1146< / span >   < span class = "keywordtype" > float< / span > ip = *ip_line++;< / div >
< div class = "line" > < a name = "l01147" > < / a > < span class = "lineno" > 1147< / span >   < span class = "keywordflow" > if< / span > (compute_l2) {< / div >
< div class = "line" > < a name = "l01148" > < / a > < span class = "lineno" > 1148< / span >   < span class = "keywordtype" > float< / span > dis = x_norms[i] + y_norms[j] - 2 * ip;< / div >
< div class = "line" > < a name = "l01149" > < / a > < span class = "lineno" > 1149< / span >   < span class = "keywordflow" > if< / span > (dis < radius) {< / div >
< div class = "line" > < a name = "l01150" > < / a > < span class = "lineno" > 1150< / span >   qres.add (dis, j);< / div >
< div class = "line" > < a name = "l01151" > < / a > < span class = "lineno" > 1151< / span >   }< / div >
< div class = "line" > < a name = "l01152" > < / a > < span class = "lineno" > 1152< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01153" > < / a > < span class = "lineno" > 1153< / span >   < span class = "keywordflow" > if< / span > (ip > radius) {< / div >
< div class = "line" > < a name = "l01154" > < / a > < span class = "lineno" > 1154< / span >   qres.add (ip, j);< / div >
< div class = "line" > < a name = "l01155" > < / a > < span class = "lineno" > 1155< / span >   }< / div >
< div class = "line" > < a name = "l01156" > < / a > < span class = "lineno" > 1156< / span >   }< / div >
< div class = "line" > < a name = "l01157" > < / a > < span class = "lineno" > 1157< / span >   }< / div >
< div class = "line" > < a name = "l01158" > < / a > < span class = "lineno" > 1158< / span >   }< / div >
< div class = "line" > < a name = "l01159" > < / a > < span class = "lineno" > 1159< / span >   }< / div >
< div class = "line" > < a name = "l01160" > < / a > < span class = "lineno" > 1160< / span >   < / div >
< div class = "line" > < a name = "l01161" > < / a > < span class = "lineno" > 1161< / span >   }< / div >
< div class = "line" > < a name = "l01162" > < / a > < span class = "lineno" > 1162< / span >   < span class = "keyword" > delete< / span > [] ip_block;< / div >
< div class = "line" > < a name = "l01163" > < / a > < span class = "lineno" > 1163< / span >   < span class = "keyword" > delete< / span > [] x_norms;< / div >
< div class = "line" > < a name = "l01164" > < / a > < span class = "lineno" > 1164< / span >   < span class = "keyword" > delete< / span > [] y_norms;< / div >
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< div class = "line" > < a name = "l01165" > < / a > < span class = "lineno" > 1165< / span >   < / div >
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< div class = "line" > < a name = "l01166" > < / a > < span class = "lineno" > 1166< / span >   { < span class = "comment" > // merge the partial results< / span > < / div >
< div class = "line" > < a name = "l01167" > < / a > < span class = "lineno" > 1167< / span >   < span class = "keywordtype" > int< / span > npres = partial_results.size();< / div >
< div class = "line" > < a name = "l01168" > < / a > < span class = "lineno" > 1168< / span >   < span class = "comment" > // count< / span > < / div >
< div class = "line" > < a name = "l01169" > < / a > < span class = "lineno" > 1169< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l01170" > < / a > < span class = "lineno" > 1170< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 0; j < npres; j++)< / div >
< div class = "line" > < a name = "l01171" > < / a > < span class = "lineno" > 1171< / span >   result-> lims[i] += partial_results[j]-> queries[i].nres;< / div >
< div class = "line" > < a name = "l01172" > < / a > < span class = "lineno" > 1172< / span >   }< / div >
< div class = "line" > < a name = "l01173" > < / a > < span class = "lineno" > 1173< / span >   result-> do_allocation ();< / div >
< div class = "line" > < a name = "l01174" > < / a > < span class = "lineno" > 1174< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 0; j < npres; j++) {< / div >
< div class = "line" > < a name = "l01175" > < / a > < span class = "lineno" > 1175< / span >   partial_results[j]-> set_result (< span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l01176" > < / a > < span class = "lineno" > 1176< / span >   < span class = "keyword" > delete< / span > partial_results[j];< / div >
< div class = "line" > < a name = "l01177" > < / a > < span class = "lineno" > 1177< / span >   }< / div >
< div class = "line" > < a name = "l01178" > < / a > < span class = "lineno" > 1178< / span >   < / div >
< div class = "line" > < a name = "l01179" > < / a > < span class = "lineno" > 1179< / span >   < span class = "comment" > // reset the limits< / span > < / div >
< div class = "line" > < a name = "l01180" > < / a > < span class = "lineno" > 1180< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = nx; i > 0; i--) {< / div >
< div class = "line" > < a name = "l01181" > < / a > < span class = "lineno" > 1181< / span >   result-> lims [i] = result-> lims [i - 1];< / div >
< div class = "line" > < a name = "l01182" > < / a > < span class = "lineno" > 1182< / span >   }< / div >
< div class = "line" > < a name = "l01183" > < / a > < span class = "lineno" > 1183< / span >   result-> lims [0] = 0;< / div >
< div class = "line" > < a name = "l01184" > < / a > < span class = "lineno" > 1184< / span >   }< / div >
< div class = "line" > < a name = "l01185" > < / a > < span class = "lineno" > 1185< / span >   }< / div >
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< div class = "line" > < a name = "l01186" > < / a > < span class = "lineno" > 1186< / span >   < / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l01187" > < / a > < span class = "lineno" > 1187< / span >   < / div >
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< div class = "line" > < a name = "l01188" > < / a > < span class = "lineno" > 1188< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > bool< / span > compute_l2> < / div >
< div class = "line" > < a name = "l01189" > < / a > < span class = "lineno" > 1189< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > range_search_sse (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l01190" > < / a > < span class = "lineno" > 1190< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l01191" > < / a > < span class = "lineno" > 1191< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l01192" > < / a > < span class = "lineno" > 1192< / span >   < span class = "keywordtype" > float< / span > radius,< / div >
< div class = "line" > < a name = "l01193" > < / a > < span class = "lineno" > 1193< / span >   RangeSearchResult *res)< / div >
< div class = "line" > < a name = "l01194" > < / a > < span class = "lineno" > 1194< / span >   {< / div >
< div class = "line" > < a name = "l01195" > < / a > < span class = "lineno" > 1195< / span >   FAISS_THROW_IF_NOT (d % 4 == 0);< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01196" > < / a > < span class = "lineno" > 1196< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01197" > < / a > < span class = "lineno" > 1197< / span >   < span class = "preprocessor" > #pragma omp parallel< / span > < / div >
< div class = "line" > < a name = "l01198" > < / a > < span class = "lineno" > 1198< / span >   < span class = "preprocessor" > < / span > {< / div >
< div class = "line" > < a name = "l01199" > < / a > < span class = "lineno" > 1199< / span >   RangeSearchPartialResult pres (res);< / div >
< div class = "line" > < a name = "l01200" > < / a > < span class = "lineno" > 1200< / span >   < / div >
< div class = "line" > < a name = "l01201" > < / a > < span class = "lineno" > 1201< / span >   < span class = "preprocessor" > #pragma omp for< / span > < / div >
< div class = "line" > < a name = "l01202" > < / a > < span class = "lineno" > 1202< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < nx; i++) {< / div >
< div class = "line" > < a name = "l01203" > < / a > < span class = "lineno" > 1203< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x_ = x + i * d;< / div >
< div class = "line" > < a name = "l01204" > < / a > < span class = "lineno" > 1204< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y_ = y;< / div >
< div class = "line" > < a name = "l01205" > < / a > < span class = "lineno" > 1205< / span >   < span class = "keywordtype" > size_t< / span > j;< / div >
< div class = "line" > < a name = "l01206" > < / a > < span class = "lineno" > 1206< / span >   < / div >
< div class = "line" > < a name = "l01207" > < / a > < span class = "lineno" > 1207< / span >   RangeSearchPartialResult::QueryResult & qres =< / div >
< div class = "line" > < a name = "l01208" > < / a > < span class = "lineno" > 1208< / span >   pres.new_result (i);< / div >
< div class = "line" > < a name = "l01209" > < / a > < span class = "lineno" > 1209< / span >   < / div >
< div class = "line" > < a name = "l01210" > < / a > < span class = "lineno" > 1210< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < ny; j++) {< / div >
< div class = "line" > < a name = "l01211" > < / a > < span class = "lineno" > 1211< / span >   < span class = "keywordflow" > if< / span > (compute_l2) {< / div >
< div class = "line" > < a name = "l01212" > < / a > < span class = "lineno" > 1212< / span >   < span class = "keywordtype" > float< / span > disij = < a class = "code" href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > fvec_L2sqr< / a > (x_, y_, d);< / div >
< div class = "line" > < a name = "l01213" > < / a > < span class = "lineno" > 1213< / span >   < span class = "keywordflow" > if< / span > (disij < radius) {< / div >
< div class = "line" > < a name = "l01214" > < / a > < span class = "lineno" > 1214< / span >   qres.add (disij, j);< / div >
< div class = "line" > < a name = "l01215" > < / a > < span class = "lineno" > 1215< / span >   }< / div >
< div class = "line" > < a name = "l01216" > < / a > < span class = "lineno" > 1216< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01217" > < / a > < span class = "lineno" > 1217< / span >   < span class = "keywordtype" > float< / span > ip = fvec_inner_product (x_, y_, d);< / div >
< div class = "line" > < a name = "l01218" > < / a > < span class = "lineno" > 1218< / span >   < span class = "keywordflow" > if< / span > (ip > radius) {< / div >
< div class = "line" > < a name = "l01219" > < / a > < span class = "lineno" > 1219< / span >   qres.add (ip, j);< / div >
< div class = "line" > < a name = "l01220" > < / a > < span class = "lineno" > 1220< / span >   }< / div >
< div class = "line" > < a name = "l01221" > < / a > < span class = "lineno" > 1221< / span >   }< / div >
< div class = "line" > < a name = "l01222" > < / a > < span class = "lineno" > 1222< / span >   y_ += d;< / div >
< div class = "line" > < a name = "l01223" > < / a > < span class = "lineno" > 1223< / span >   }< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01224" > < / a > < span class = "lineno" > 1224< / span >   < / div >
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< div class = "line" > < a name = "l01225" > < / a > < span class = "lineno" > 1225< / span >   }< / div >
< div class = "line" > < a name = "l01226" > < / a > < span class = "lineno" > 1226< / span >   pres.finalize ();< / div >
< div class = "line" > < a name = "l01227" > < / a > < span class = "lineno" > 1227< / span >   }< / div >
< div class = "line" > < a name = "l01228" > < / a > < span class = "lineno" > 1228< / span >   }< / div >
< div class = "line" > < a name = "l01229" > < / a > < span class = "lineno" > 1229< / span >   < / div >
< div class = "line" > < a name = "l01230" > < / a > < span class = "lineno" > 1230< / span >   < / div >
< div class = "line" > < a name = "l01231" > < / a > < span class = "lineno" > 1231< / span >   < / div >
< div class = "line" > < a name = "l01232" > < / a > < span class = "lineno" > 1232< / span >   < / div >
< div class = "line" > < a name = "l01233" > < / a > < span class = "lineno" > 1233< / span >   < / div >
< div class = "line" > < a name = "l01234" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a1faa7bd079c9b1addf3058ddf882a000" > 1234< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#a1faa7bd079c9b1addf3058ddf882a000" > range_search_L2sqr< / a > (< / div >
< div class = "line" > < a name = "l01235" > < / a > < span class = "lineno" > 1235< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l01236" > < / a > < span class = "lineno" > 1236< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l01237" > < / a > < span class = "lineno" > 1237< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l01238" > < / a > < span class = "lineno" > 1238< / span >   < span class = "keywordtype" > float< / span > radius,< / div >
< div class = "line" > < a name = "l01239" > < / a > < span class = "lineno" > 1239< / span >   < a class = "code" href = "structfaiss_1_1RangeSearchResult.html" > RangeSearchResult< / a > *res)< / div >
< div class = "line" > < a name = "l01240" > < / a > < span class = "lineno" > 1240< / span >   {< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01241" > < / a > < span class = "lineno" > 1241< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01242" > < / a > < span class = "lineno" > 1242< / span >   < span class = "keywordflow" > if< / span > (d % 4 == 0 & & nx < 20) {< / div >
< div class = "line" > < a name = "l01243" > < / a > < span class = "lineno" > 1243< / span >   range_search_sse< true> (x, y, d, nx, ny, radius, res);< / div >
< div class = "line" > < a name = "l01244" > < / a > < span class = "lineno" > 1244< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01245" > < / a > < span class = "lineno" > 1245< / span >   range_search_blas< true> (x, y, d, nx, ny, radius, res);< / div >
< div class = "line" > < a name = "l01246" > < / a > < span class = "lineno" > 1246< / span >   }< / div >
< div class = "line" > < a name = "l01247" > < / a > < span class = "lineno" > 1247< / span >   }< / div >
< div class = "line" > < a name = "l01248" > < / a > < span class = "lineno" > 1248< / span >   < / div >
< div class = "line" > < a name = "l01249" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#ab29d725b808df6f142b80f21aa45e507" > 1249< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#ab29d725b808df6f142b80f21aa45e507" > range_search_inner_product< / a > (< / div >
< div class = "line" > < a name = "l01250" > < / a > < span class = "lineno" > 1250< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l01251" > < / a > < span class = "lineno" > 1251< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * y,< / div >
< div class = "line" > < a name = "l01252" > < / a > < span class = "lineno" > 1252< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > nx, < span class = "keywordtype" > size_t< / span > ny,< / div >
< div class = "line" > < a name = "l01253" > < / a > < span class = "lineno" > 1253< / span >   < span class = "keywordtype" > float< / span > radius,< / div >
< div class = "line" > < a name = "l01254" > < / a > < span class = "lineno" > 1254< / span >   < a class = "code" href = "structfaiss_1_1RangeSearchResult.html" > RangeSearchResult< / a > *res)< / div >
< div class = "line" > < a name = "l01255" > < / a > < span class = "lineno" > 1255< / span >   {< / div >
< div class = "line" > < a name = "l01256" > < / a > < span class = "lineno" > 1256< / span >   < / div >
< div class = "line" > < a name = "l01257" > < / a > < span class = "lineno" > 1257< / span >   < span class = "keywordflow" > if< / span > (d % 4 == 0 & & nx < 20) {< / div >
< div class = "line" > < a name = "l01258" > < / a > < span class = "lineno" > 1258< / span >   range_search_sse< false> (x, y, d, nx, ny, radius, res);< / div >
< div class = "line" > < a name = "l01259" > < / a > < span class = "lineno" > 1259< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01260" > < / a > < span class = "lineno" > 1260< / span >   range_search_blas< false> (x, y, d, nx, ny, radius, res);< / div >
< div class = "line" > < a name = "l01261" > < / a > < span class = "lineno" > 1261< / span >   }< / div >
< div class = "line" > < a name = "l01262" > < / a > < span class = "lineno" > 1262< / span >   }< / div >
< div class = "line" > < a name = "l01263" > < / a > < span class = "lineno" > 1263< / span >   < / div >
< div class = "line" > < a name = "l01264" > < / a > < span class = "lineno" > 1264< / span >   < / div >
< div class = "line" > < a name = "l01265" > < / a > < span class = "lineno" > 1265< / span >   < / div >
< div class = "line" > < a name = "l01266" > < / a > < span class = "lineno" > 1266< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l01267" > < / a > < span class = "lineno" > 1267< / span >   < span class = "comment" > * Some matrix manipulation functions< / span > < / div >
< div class = "line" > < a name = "l01268" > < / a > < span class = "lineno" > 1268< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
< div class = "line" > < a name = "l01269" > < / a > < span class = "lineno" > 1269< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01270" > < / a > < span class = "lineno" > 1270< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01271" > < / a > < span class = "lineno" > 1271< / span >   < span class = "comment" > /* This function exists because the Torch counterpart is extremly slow< / span > < / div >
< div class = "line" > < a name = "l01272" > < / a > < span class = "lineno" > 1272< / span >   < span class = "comment" > (not multi-threaded + unexpected overhead even in single thread).< / span > < / div >
< div class = "line" > < a name = "l01273" > < / a > < span class = "lineno" > 1273< / span >   < span class = "comment" > It is here to implement the usual property |x-y|^2=|x|^2+|y|^2-2< x|y> */< / span > < / div >
< div class = "line" > < a name = "l01274" > < / a > < span class = "lineno" > 1274< / span >   < span class = "keywordtype" > void< / span > inner_product_to_L2sqr (< span class = "keywordtype" > float< / span > * __restrict dis,< / div >
< div class = "line" > < a name = "l01275" > < / a > < span class = "lineno" > 1275< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * nr1,< / div >
< div class = "line" > < a name = "l01276" > < / a > < span class = "lineno" > 1276< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * nr2,< / div >
< div class = "line" > < a name = "l01277" > < / a > < span class = "lineno" > 1277< / span >   < span class = "keywordtype" > size_t< / span > n1, < span class = "keywordtype" > size_t< / span > n2)< / div >
< div class = "line" > < a name = "l01278" > < / a > < span class = "lineno" > 1278< / span >   {< / div >
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< div class = "line" > < a name = "l01279" > < / a > < span class = "lineno" > 1279< / span >   < / div >
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< div class = "line" > < a name = "l01280" > < / a > < span class = "lineno" > 1280< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01281" > < / a > < span class = "lineno" > 1281< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0 ; j < n1 ; j++) {< / div >
< div class = "line" > < a name = "l01282" > < / a > < span class = "lineno" > 1282< / span >   < span class = "keywordtype" > float< / span > * disj = dis + j * n2;< / div >
< div class = "line" > < a name = "l01283" > < / a > < span class = "lineno" > 1283< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0 ; i < n2 ; i++)< / div >
< div class = "line" > < a name = "l01284" > < / a > < span class = "lineno" > 1284< / span >   disj[i] = nr1[j] + nr2[i] - 2 * disj[i];< / div >
< div class = "line" > < a name = "l01285" > < / a > < span class = "lineno" > 1285< / span >   }< / div >
< div class = "line" > < a name = "l01286" > < / a > < span class = "lineno" > 1286< / span >   }< / div >
< div class = "line" > < a name = "l01287" > < / a > < span class = "lineno" > 1287< / span >   < / div >
< div class = "line" > < a name = "l01288" > < / a > < span class = "lineno" > 1288< / span >   < / div >
< div class = "line" > < a name = "l01289" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#afb68fe89ad5e948974da1b70d7b4157c" > 1289< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#afb68fe89ad5e948974da1b70d7b4157c" > matrix_qr< / a > (< span class = "keywordtype" > int< / span > m, < span class = "keywordtype" > int< / span > n, < span class = "keywordtype" > float< / span > *a)< / div >
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< div class = "line" > < a name = "l01290" > < / a > < span class = "lineno" > 1290< / span >   {< / div >
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< div class = "line" > < a name = "l01291" > < / a > < span class = "lineno" > 1291< / span >   FAISS_THROW_IF_NOT (m > = n);< / div >
< div class = "line" > < a name = "l01292" > < / a > < span class = "lineno" > 1292< / span >   FINTEGER mi = m, ni = n, ki = mi < ni ? mi : ni;< / div >
< div class = "line" > < a name = "l01293" > < / a > < span class = "lineno" > 1293< / span >   std::vector< float> tau (ki);< / div >
< div class = "line" > < a name = "l01294" > < / a > < span class = "lineno" > 1294< / span >   FINTEGER lwork = -1, info;< / div >
< div class = "line" > < a name = "l01295" > < / a > < span class = "lineno" > 1295< / span >   < span class = "keywordtype" > float< / span > work_size;< / div >
< div class = "line" > < a name = "l01296" > < / a > < span class = "lineno" > 1296< / span >   < / div >
< div class = "line" > < a name = "l01297" > < / a > < span class = "lineno" > 1297< / span >   sgeqrf_ (& mi, & ni, a, & mi, tau.data(),< / div >
< div class = "line" > < a name = "l01298" > < / a > < span class = "lineno" > 1298< / span >   & work_size, & lwork, & info);< / div >
< div class = "line" > < a name = "l01299" > < / a > < span class = "lineno" > 1299< / span >   lwork = size_t(work_size);< / div >
< div class = "line" > < a name = "l01300" > < / a > < span class = "lineno" > 1300< / span >   std::vector< float> work (lwork);< / div >
< div class = "line" > < a name = "l01301" > < / a > < span class = "lineno" > 1301< / span >   < / div >
< div class = "line" > < a name = "l01302" > < / a > < span class = "lineno" > 1302< / span >   sgeqrf_ (& mi, & ni, a, & mi,< / div >
< div class = "line" > < a name = "l01303" > < / a > < span class = "lineno" > 1303< / span >   tau.data(), work.data(), & lwork, & info);< / div >
< div class = "line" > < a name = "l01304" > < / a > < span class = "lineno" > 1304< / span >   < / div >
< div class = "line" > < a name = "l01305" > < / a > < span class = "lineno" > 1305< / span >   sorgqr_ (& mi, & ni, & ki, a, & mi, tau.data(),< / div >
< div class = "line" > < a name = "l01306" > < / a > < span class = "lineno" > 1306< / span >   work.data(), & lwork, & info);< / div >
< div class = "line" > < a name = "l01307" > < / a > < span class = "lineno" > 1307< / span >   < / div >
< div class = "line" > < a name = "l01308" > < / a > < span class = "lineno" > 1308< / span >   }< / div >
< div class = "line" > < a name = "l01309" > < / a > < span class = "lineno" > 1309< / span >   < / div >
< div class = "line" > < a name = "l01310" > < / a > < span class = "lineno" > 1310< / span >   < / div >
< div class = "line" > < a name = "l01311" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a3d9c7db82d43c1f0ab1d28b92bc9fe57" > 1311< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#a3d9c7db82d43c1f0ab1d28b92bc9fe57" > pairwise_L2sqr< / a > (< span class = "keywordtype" > long< / span > d,< / div >
< div class = "line" > < a name = "l01312" > < / a > < span class = "lineno" > 1312< / span >   < span class = "keywordtype" > long< / span > nq, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *xq,< / div >
< div class = "line" > < a name = "l01313" > < / a > < span class = "lineno" > 1313< / span >   < span class = "keywordtype" > long< / span > nb, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *xb,< / div >
< div class = "line" > < a name = "l01314" > < / a > < span class = "lineno" > 1314< / span >   < span class = "keywordtype" > float< / span > *dis,< / div >
< div class = "line" > < a name = "l01315" > < / a > < span class = "lineno" > 1315< / span >   < span class = "keywordtype" > long< / span > ldq, < span class = "keywordtype" > long< / span > ldb, < span class = "keywordtype" > long< / span > ldd)< / div >
< div class = "line" > < a name = "l01316" > < / a > < span class = "lineno" > 1316< / span >   {< / div >
< div class = "line" > < a name = "l01317" > < / a > < span class = "lineno" > 1317< / span >   < span class = "keywordflow" > if< / span > (nq == 0 || nb == 0) < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l01318" > < / a > < span class = "lineno" > 1318< / span >   < span class = "keywordflow" > if< / span > (ldq == -1) ldq = d;< / div >
< div class = "line" > < a name = "l01319" > < / a > < span class = "lineno" > 1319< / span >   < span class = "keywordflow" > if< / span > (ldb == -1) ldb = d;< / div >
< div class = "line" > < a name = "l01320" > < / a > < span class = "lineno" > 1320< / span >   < span class = "keywordflow" > if< / span > (ldd == -1) ldd = nb;< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01321" > < / a > < span class = "lineno" > 1321< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01322" > < / a > < span class = "lineno" > 1322< / span >   < span class = "comment" > // store in beginning of distance matrix to avoid malloc< / span > < / div >
< div class = "line" > < a name = "l01323" > < / a > < span class = "lineno" > 1323< / span >   < span class = "keywordtype" > float< / span > *b_norms = dis;< / div >
< div class = "line" > < a name = "l01324" > < / a > < span class = "lineno" > 1324< / span >   < / div >
< div class = "line" > < a name = "l01325" > < / a > < span class = "lineno" > 1325< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01326" > < / a > < span class = "lineno" > 1326< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > i = 0; i < nb; i++)< / div >
< div class = "line" > < a name = "l01327" > < / a > < span class = "lineno" > 1327< / span >   b_norms [i] = < a class = "code" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > fvec_norm_L2sqr< / a > (xb + i * ldb, d);< / div >
< div class = "line" > < a name = "l01328" > < / a > < span class = "lineno" > 1328< / span >   < / div >
< div class = "line" > < a name = "l01329" > < / a > < span class = "lineno" > 1329< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01330" > < / a > < span class = "lineno" > 1330< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > i = 1; i < nq; i++) {< / div >
< div class = "line" > < a name = "l01331" > < / a > < span class = "lineno" > 1331< / span >   < span class = "keywordtype" > float< / span > q_norm = < a class = "code" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > fvec_norm_L2sqr< / a > (xq + i * ldq, d);< / div >
< div class = "line" > < a name = "l01332" > < / a > < span class = "lineno" > 1332< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > j = 0; j < nb; j++)< / div >
< div class = "line" > < a name = "l01333" > < / a > < span class = "lineno" > 1333< / span >   dis[i * ldd + j] = q_norm + b_norms [j];< / div >
< div class = "line" > < a name = "l01334" > < / a > < span class = "lineno" > 1334< / span >   }< / div >
< div class = "line" > < a name = "l01335" > < / a > < span class = "lineno" > 1335< / span >   < / div >
< div class = "line" > < a name = "l01336" > < / a > < span class = "lineno" > 1336< / span >   {< / div >
< div class = "line" > < a name = "l01337" > < / a > < span class = "lineno" > 1337< / span >   < span class = "keywordtype" > float< / span > q_norm = < a class = "code" href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > fvec_norm_L2sqr< / a > (xq, d);< / div >
< div class = "line" > < a name = "l01338" > < / a > < span class = "lineno" > 1338< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > j = 0; j < nb; j++)< / div >
< div class = "line" > < a name = "l01339" > < / a > < span class = "lineno" > 1339< / span >   dis[j] += q_norm;< / div >
< div class = "line" > < a name = "l01340" > < / a > < span class = "lineno" > 1340< / span >   }< / div >
< div class = "line" > < a name = "l01341" > < / a > < span class = "lineno" > 1341< / span >   < / div >
< div class = "line" > < a name = "l01342" > < / a > < span class = "lineno" > 1342< / span >   {< / div >
< div class = "line" > < a name = "l01343" > < / a > < span class = "lineno" > 1343< / span >   FINTEGER nbi = nb, nqi = nq, di = d, ldqi = ldq, ldbi = ldb, lddi = ldd;< / div >
< div class = "line" > < a name = "l01344" > < / a > < span class = "lineno" > 1344< / span >   < span class = "keywordtype" > float< / span > one = 1.0, minus_2 = -2.0;< / div >
< div class = "line" > < a name = "l01345" > < / a > < span class = "lineno" > 1345< / span >   < / div >
< div class = "line" > < a name = "l01346" > < / a > < span class = "lineno" > 1346< / span >   sgemm_ (< span class = "stringliteral" > " Transposed" < / span > , < span class = "stringliteral" > " Not transposed" < / span > ,< / div >
< div class = "line" > < a name = "l01347" > < / a > < span class = "lineno" > 1347< / span >   & nbi, & nqi, & di,< / div >
< div class = "line" > < a name = "l01348" > < / a > < span class = "lineno" > 1348< / span >   & minus_2,< / div >
< div class = "line" > < a name = "l01349" > < / a > < span class = "lineno" > 1349< / span >   xb, & ldbi,< / div >
< div class = "line" > < a name = "l01350" > < / a > < span class = "lineno" > 1350< / span >   xq, & ldqi,< / div >
< div class = "line" > < a name = "l01351" > < / a > < span class = "lineno" > 1351< / span >   & one, dis, & lddi);< / div >
< div class = "line" > < a name = "l01352" > < / a > < span class = "lineno" > 1352< / span >   }< / div >
< div class = "line" > < a name = "l01353" > < / a > < span class = "lineno" > 1353< / span >   < / div >
< div class = "line" > < a name = "l01354" > < / a > < span class = "lineno" > 1354< / span >   < / div >
< div class = "line" > < a name = "l01355" > < / a > < span class = "lineno" > 1355< / span >   }< / div >
< div class = "line" > < a name = "l01356" > < / a > < span class = "lineno" > 1356< / span >   < / div >
< div class = "line" > < a name = "l01357" > < / a > < span class = "lineno" > 1357< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01358" > < / a > < span class = "lineno" > 1358< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01359" > < / a > < span class = "lineno" > 1359< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l01360" > < / a > < span class = "lineno" > 1360< / span >   < span class = "comment" > * Kmeans subroutine< / span > < / div >
< div class = "line" > < a name = "l01361" > < / a > < span class = "lineno" > 1361< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
< div class = "line" > < a name = "l01362" > < / a > < span class = "lineno" > 1362< / span >   < / div >
< div class = "line" > < a name = "l01363" > < / a > < span class = "lineno" > 1363< / span >   < span class = "comment" > // a bit above machine epsilon for float16< / span > < / div >
< div class = "line" > < a name = "l01364" > < / a > < span class = "lineno" > 1364< / span >   < / div >
< div class = "line" > < a name = "l01365" > < / a > < span class = "lineno" > 1365< / span >   < span class = "preprocessor" > #define EPS (1 / 1024.)< / span > < / div >
< div class = "line" > < a name = "l01366" > < / a > < span class = "lineno" > 1366< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l01367" > < / a > < span class = "lineno" > 1367< / span >   < span class = "comment" > /* For k-means, compute centroids given assignment of vectors to centroids */< / span > < / div >
< div class = "line" > < a name = "l01368" > < / a > < span class = "lineno" > 1368< / span >   < span class = "comment" > /* NOTE: This could be multi-threaded (use histogram of indexes) */< / span > < / div >
< div class = "line" > < a name = "l01369" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#ad1cfbe51f2d77dc5094e0140f5955165" > 1369< / a > < / span >   < span class = "keywordtype" > int< / span > < a class = "code" href = "namespacefaiss.html#ad1cfbe51f2d77dc5094e0140f5955165" > km_update_centroids< / a > (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l01370" > < / a > < span class = "lineno" > 1370< / span >   < span class = "keywordtype" > float< / span > * centroids,< / div >
< div class = "line" > < a name = "l01371" > < / a > < span class = "lineno" > 1371< / span >   < span class = "keywordtype" > long< / span > * assign,< / div >
< div class = "line" > < a name = "l01372" > < / a > < span class = "lineno" > 1372< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > k, < span class = "keywordtype" > size_t< / span > n)< / div >
< div class = "line" > < a name = "l01373" > < / a > < span class = "lineno" > 1373< / span >   {< / div >
< div class = "line" > < a name = "l01374" > < / a > < span class = "lineno" > 1374< / span >   std::vector< size_t> hassign(k);< / div >
< div class = "line" > < a name = "l01375" > < / a > < span class = "lineno" > 1375< / span >   memset (centroids, 0, < span class = "keyword" > sizeof< / span > (*centroids) * d * k);< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l01376" > < / a > < span class = "lineno" > 1376< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01377" > < / a > < span class = "lineno" > 1377< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01378" > < / a > < span class = "lineno" > 1378< / span >   < span class = "preprocessor" > #pragma omp parallel< / span > < / div >
< div class = "line" > < a name = "l01379" > < / a > < span class = "lineno" > 1379< / span >   < span class = "preprocessor" > < / span > {< / div >
< div class = "line" > < a name = "l01380" > < / a > < span class = "lineno" > 1380< / span >   < span class = "keywordtype" > int< / span > nt = omp_get_num_threads();< / div >
< div class = "line" > < a name = "l01381" > < / a > < span class = "lineno" > 1381< / span >   < span class = "keywordtype" > int< / span > rank = omp_get_thread_num();< / div >
< div class = "line" > < a name = "l01382" > < / a > < span class = "lineno" > 1382< / span >   < span class = "comment" > // this thread is taking care of centroids c0:c1< / span > < / div >
< div class = "line" > < a name = "l01383" > < / a > < span class = "lineno" > 1383< / span >   < span class = "keywordtype" > size_t< / span > c0 = (k * rank) / nt;< / div >
< div class = "line" > < a name = "l01384" > < / a > < span class = "lineno" > 1384< / span >   < span class = "keywordtype" > size_t< / span > c1 = (k * (rank + 1)) / nt;< / div >
< div class = "line" > < a name = "l01385" > < / a > < span class = "lineno" > 1385< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *xi = x;< / div >
< div class = "line" > < a name = "l01386" > < / a > < span class = "lineno" > 1386< / span >   < span class = "comment" > // printf(" thread %d/%d: centroids %ld:%ld\n" , rank, nt, c0, c1);< / span > < / div >
< div class = "line" > < a name = "l01387" > < / a > < span class = "lineno" > 1387< / span >   < span class = "keywordtype" > size_t< / span > nacc = 0;< / div >
< div class = "line" > < a name = "l01388" > < / a > < span class = "lineno" > 1388< / span >   < / div >
< div class = "line" > < a name = "l01389" > < / a > < span class = "lineno" > 1389< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++) {< / div >
< div class = "line" > < a name = "l01390" > < / a > < span class = "lineno" > 1390< / span >   < span class = "keywordtype" > long< / span > ci = assign[i];< / div >
< div class = "line" > < a name = "l01391" > < / a > < span class = "lineno" > 1391< / span >   assert (ci > = 0 & & ci < k);< / div >
< div class = "line" > < a name = "l01392" > < / a > < span class = "lineno" > 1392< / span >   < span class = "keywordflow" > if< / span > (ci > = c0 & & ci < c1) {< / div >
< div class = "line" > < a name = "l01393" > < / a > < span class = "lineno" > 1393< / span >   < span class = "keywordtype" > float< / span > * c = centroids + ci * d;< / div >
< div class = "line" > < a name = "l01394" > < / a > < span class = "lineno" > 1394< / span >   hassign[ci]++;< / div >
< div class = "line" > < a name = "l01395" > < / a > < span class = "lineno" > 1395< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l01396" > < / a > < span class = "lineno" > 1396< / span >   c[j] += xi[j];< / div >
< div class = "line" > < a name = "l01397" > < / a > < span class = "lineno" > 1397< / span >   nacc++;< / div >
< div class = "line" > < a name = "l01398" > < / a > < span class = "lineno" > 1398< / span >   }< / div >
< div class = "line" > < a name = "l01399" > < / a > < span class = "lineno" > 1399< / span >   xi += d;< / div >
< div class = "line" > < a name = "l01400" > < / a > < span class = "lineno" > 1400< / span >   }< / div >
< div class = "line" > < a name = "l01401" > < / a > < span class = "lineno" > 1401< / span >   < span class = "comment" > // printf(" thread %d/%d: nacc = %ld/%ld\n" , rank, nt, nacc, n);< / span > < / div >
< div class = "line" > < a name = "l01402" > < / a > < span class = "lineno" > 1402< / span >   < / div >
< div class = "line" > < a name = "l01403" > < / a > < span class = "lineno" > 1403< / span >   }< / div >
< div class = "line" > < a name = "l01404" > < / a > < span class = "lineno" > 1404< / span >   < / div >
< div class = "line" > < a name = "l01405" > < / a > < span class = "lineno" > 1405< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01406" > < / a > < span class = "lineno" > 1406< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > ci = 0; ci < k; ci++) {< / div >
< div class = "line" > < a name = "l01407" > < / a > < span class = "lineno" > 1407< / span >   < span class = "keywordtype" > float< / span > * c = centroids + ci * d;< / div >
< div class = "line" > < a name = "l01408" > < / a > < span class = "lineno" > 1408< / span >   < span class = "keywordtype" > float< / span > ni = (float) hassign[ci];< / div >
< div class = "line" > < a name = "l01409" > < / a > < span class = "lineno" > 1409< / span >   < span class = "keywordflow" > if< / span > (ni != 0) {< / div >
< div class = "line" > < a name = "l01410" > < / a > < span class = "lineno" > 1410< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l01411" > < / a > < span class = "lineno" > 1411< / span >   c[j] /= ni;< / div >
< div class = "line" > < a name = "l01412" > < / a > < span class = "lineno" > 1412< / span >   }< / div >
< div class = "line" > < a name = "l01413" > < / a > < span class = "lineno" > 1413< / span >   }< / div >
< div class = "line" > < a name = "l01414" > < / a > < span class = "lineno" > 1414< / span >   < / div >
< div class = "line" > < a name = "l01415" > < / a > < span class = "lineno" > 1415< / span >   < span class = "comment" > /* Take care of void clusters */< / span > < / div >
< div class = "line" > < a name = "l01416" > < / a > < span class = "lineno" > 1416< / span >   < span class = "keywordtype" > size_t< / span > nsplit = 0;< / div >
< div class = "line" > < a name = "l01417" > < / a > < span class = "lineno" > 1417< / span >   < a class = "code" href = "structfaiss_1_1RandomGenerator.html" > RandomGenerator< / a > rng (1234);< / div >
< div class = "line" > < a name = "l01418" > < / a > < span class = "lineno" > 1418< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > ci = 0; ci < k; ci++) {< / div >
< div class = "line" > < a name = "l01419" > < / a > < span class = "lineno" > 1419< / span >   < span class = "keywordflow" > if< / span > (hassign[ci] == 0) { < span class = "comment" > /* need to redefine a centroid */< / span > < / div >
< div class = "line" > < a name = "l01420" > < / a > < span class = "lineno" > 1420< / span >   < span class = "keywordtype" > size_t< / span > cj;< / div >
< div class = "line" > < a name = "l01421" > < / a > < span class = "lineno" > 1421< / span >   < span class = "keywordflow" > for< / span > (cj = 0; 1; cj = (cj+1) % k) {< / div >
< div class = "line" > < a name = "l01422" > < / a > < span class = "lineno" > 1422< / span >   < span class = "comment" > /* probability to pick this cluster for split */< / span > < / div >
< div class = "line" > < a name = "l01423" > < / a > < span class = "lineno" > 1423< / span >   < span class = "keywordtype" > float< / span > p = (hassign[cj] - 1.0) / (float) (n - k);< / div >
< div class = "line" > < a name = "l01424" > < / a > < span class = "lineno" > 1424< / span >   < span class = "keywordtype" > float< / span > r = rng.< a class = "code" href = "structfaiss_1_1RandomGenerator.html#ac82a433d7bfa56d750907ba5cf74aed7" > rand_float< / a > ();< / div >
< div class = "line" > < a name = "l01425" > < / a > < span class = "lineno" > 1425< / span >   < span class = "keywordflow" > if< / span > (r < p) {< / div >
< div class = "line" > < a name = "l01426" > < / a > < span class = "lineno" > 1426< / span >   < span class = "keywordflow" > break< / span > ; < span class = "comment" > /* found our cluster to be split */< / span > < / div >
< div class = "line" > < a name = "l01427" > < / a > < span class = "lineno" > 1427< / span >   }< / div >
< div class = "line" > < a name = "l01428" > < / a > < span class = "lineno" > 1428< / span >   }< / div >
< div class = "line" > < a name = "l01429" > < / a > < span class = "lineno" > 1429< / span >   memcpy (centroids+ci*d, centroids+cj*d, < span class = "keyword" > sizeof< / span > (*centroids) * d);< / div >
< div class = "line" > < a name = "l01430" > < / a > < span class = "lineno" > 1430< / span >   < / div >
< div class = "line" > < a name = "l01431" > < / a > < span class = "lineno" > 1431< / span >   < span class = "comment" > /* small symmetric pertubation. Much better than */< / span > < / div >
< div class = "line" > < a name = "l01432" > < / a > < span class = "lineno" > 1432< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l01433" > < / a > < span class = "lineno" > 1433< / span >   < span class = "keywordflow" > if< / span > (j % 2 == 0) {< / div >
< div class = "line" > < a name = "l01434" > < / a > < span class = "lineno" > 1434< / span >   centroids[ci * d + j] *= 1 + EPS;< / div >
< div class = "line" > < a name = "l01435" > < / a > < span class = "lineno" > 1435< / span >   centroids[cj * d + j] *= 1 - EPS;< / div >
< div class = "line" > < a name = "l01436" > < / a > < span class = "lineno" > 1436< / span >   }< / div >
< div class = "line" > < a name = "l01437" > < / a > < span class = "lineno" > 1437< / span >   < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01438" > < / a > < span class = "lineno" > 1438< / span >   centroids[ci * d + j] *= 1 + EPS;< / div >
< div class = "line" > < a name = "l01439" > < / a > < span class = "lineno" > 1439< / span >   centroids[cj * d + j] *= 1 - EPS;< / div >
< div class = "line" > < a name = "l01440" > < / a > < span class = "lineno" > 1440< / span >   }< / div >
< div class = "line" > < a name = "l01441" > < / a > < span class = "lineno" > 1441< / span >   < / div >
< div class = "line" > < a name = "l01442" > < / a > < span class = "lineno" > 1442< / span >   < span class = "comment" > /* assume even split of the cluster */< / span > < / div >
< div class = "line" > < a name = "l01443" > < / a > < span class = "lineno" > 1443< / span >   hassign[ci] = hassign[cj] / 2;< / div >
< div class = "line" > < a name = "l01444" > < / a > < span class = "lineno" > 1444< / span >   hassign[cj] -= hassign[ci];< / div >
< div class = "line" > < a name = "l01445" > < / a > < span class = "lineno" > 1445< / span >   nsplit++;< / div >
< div class = "line" > < a name = "l01446" > < / a > < span class = "lineno" > 1446< / span >   }< / div >
< div class = "line" > < a name = "l01447" > < / a > < span class = "lineno" > 1447< / span >   }< / div >
< div class = "line" > < a name = "l01448" > < / a > < span class = "lineno" > 1448< / span >   < / div >
< div class = "line" > < a name = "l01449" > < / a > < span class = "lineno" > 1449< / span >   < span class = "keywordflow" > return< / span > nsplit;< / div >
< div class = "line" > < a name = "l01450" > < / a > < span class = "lineno" > 1450< / span >   }< / div >
< div class = "line" > < a name = "l01451" > < / a > < span class = "lineno" > 1451< / span >   < / div >
< div class = "line" > < a name = "l01452" > < / a > < span class = "lineno" > 1452< / span >   < span class = "preprocessor" > #undef EPS< / span > < / div >
< div class = "line" > < a name = "l01453" > < / a > < span class = "lineno" > 1453< / span >   < span class = "preprocessor" > < / span > < / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l01454" > < / a > < span class = "lineno" > 1454< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01455" > < / a > < span class = "lineno" > 1455< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01456" > < / a > < span class = "lineno" > 1456< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l01457" > < / a > < span class = "lineno" > 1457< / span >   < span class = "comment" > * Result list routines< / span > < / div >
< div class = "line" > < a name = "l01458" > < / a > < span class = "lineno" > 1458< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
< div class = "line" > < a name = "l01459" > < / a > < span class = "lineno" > 1459< / span >   < / div >
< div class = "line" > < a name = "l01460" > < / a > < span class = "lineno" > 1460< / span >   < / div >
< div class = "line" > < a name = "l01461" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#ae0ee1b6fbd3d6da0f1a3550a780ca24c" > 1461< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#ae0ee1b6fbd3d6da0f1a3550a780ca24c" > ranklist_handle_ties< / a > (< span class = "keywordtype" > int< / span > k, < span class = "keywordtype" > long< / span > *idx, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *dis)< / div >
< div class = "line" > < a name = "l01462" > < / a > < span class = "lineno" > 1462< / span >   {< / div >
< div class = "line" > < a name = "l01463" > < / a > < span class = "lineno" > 1463< / span >   < span class = "keywordtype" > float< / span > prev_dis = -1e38;< / div >
< div class = "line" > < a name = "l01464" > < / a > < span class = "lineno" > 1464< / span >   < span class = "keywordtype" > int< / span > prev_i = -1;< / div >
< div class = "line" > < a name = "l01465" > < / a > < span class = "lineno" > 1465< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < k; i++) {< / div >
< div class = "line" > < a name = "l01466" > < / a > < span class = "lineno" > 1466< / span >   < span class = "keywordflow" > if< / span > (dis[i] != prev_dis) {< / div >
< div class = "line" > < a name = "l01467" > < / a > < span class = "lineno" > 1467< / span >   < span class = "keywordflow" > if< / span > (i > prev_i + 1) {< / div >
< div class = "line" > < a name = "l01468" > < / a > < span class = "lineno" > 1468< / span >   < span class = "comment" > // sort between prev_i and i - 1< / span > < / div >
< div class = "line" > < a name = "l01469" > < / a > < span class = "lineno" > 1469< / span >   std::sort (idx + prev_i, idx + i);< / div >
< div class = "line" > < a name = "l01470" > < / a > < span class = "lineno" > 1470< / span >   }< / div >
< div class = "line" > < a name = "l01471" > < / a > < span class = "lineno" > 1471< / span >   prev_i = i;< / div >
< div class = "line" > < a name = "l01472" > < / a > < span class = "lineno" > 1472< / span >   prev_dis = dis[i];< / div >
< div class = "line" > < a name = "l01473" > < / a > < span class = "lineno" > 1473< / span >   }< / div >
< div class = "line" > < a name = "l01474" > < / a > < span class = "lineno" > 1474< / span >   }< / div >
< div class = "line" > < a name = "l01475" > < / a > < span class = "lineno" > 1475< / span >   }< / div >
< div class = "line" > < a name = "l01476" > < / a > < span class = "lineno" > 1476< / span >   < / div >
< div class = "line" > < a name = "l01477" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#afb7b33f6892678ba79aaf5e71777837c" > 1477< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "namespacefaiss.html#afb7b33f6892678ba79aaf5e71777837c" > merge_result_table_with< / a > (< span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > size_t< / span > k,< / div >
< div class = "line" > < a name = "l01478" > < / a > < span class = "lineno" > 1478< / span >   < span class = "keywordtype" > long< / span > *I0, < span class = "keywordtype" > float< / span > *D0,< / div >
< div class = "line" > < a name = "l01479" > < / a > < span class = "lineno" > 1479< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > *I1, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *D1,< / div >
< div class = "line" > < a name = "l01480" > < / a > < span class = "lineno" > 1480< / span >   < span class = "keywordtype" > bool< / span > keep_min,< / div >
< div class = "line" > < a name = "l01481" > < / a > < span class = "lineno" > 1481< / span >   < span class = "keywordtype" > long< / span > translation)< / div >
< div class = "line" > < a name = "l01482" > < / a > < span class = "lineno" > 1482< / span >   {< / div >
< div class = "line" > < a name = "l01483" > < / a > < span class = "lineno" > 1483< / span >   < span class = "keywordtype" > size_t< / span > n1 = 0;< / div >
< div class = "line" > < a name = "l01484" > < / a > < span class = "lineno" > 1484< / span >   < / div >
< div class = "line" > < a name = "l01485" > < / a > < span class = "lineno" > 1485< / span >   < span class = "preprocessor" > #pragma omp parallel reduction(+:n1)< / span > < / div >
< div class = "line" > < a name = "l01486" > < / a > < span class = "lineno" > 1486< / span >   < span class = "preprocessor" > < / span > {< / div >
< div class = "line" > < a name = "l01487" > < / a > < span class = "lineno" > 1487< / span >   std::vector< long> tmpI (k);< / div >
< div class = "line" > < a name = "l01488" > < / a > < span class = "lineno" > 1488< / span >   std::vector< float> tmpD (k);< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01489" > < / a > < span class = "lineno" > 1489< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01490" > < / a > < span class = "lineno" > 1490< / span >   < span class = "preprocessor" > #pragma omp for< / span > < / div >
< div class = "line" > < a name = "l01491" > < / a > < span class = "lineno" > 1491< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++) {< / div >
< div class = "line" > < a name = "l01492" > < / a > < span class = "lineno" > 1492< / span >   < span class = "keywordtype" > long< / span > *lI0 = I0 + i * k;< / div >
< div class = "line" > < a name = "l01493" > < / a > < span class = "lineno" > 1493< / span >   < span class = "keywordtype" > float< / span > *lD0 = D0 + i * k;< / div >
< div class = "line" > < a name = "l01494" > < / a > < span class = "lineno" > 1494< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > *lI1 = I1 + i * k;< / div >
< div class = "line" > < a name = "l01495" > < / a > < span class = "lineno" > 1495< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *lD1 = D1 + i * k;< / div >
< div class = "line" > < a name = "l01496" > < / a > < span class = "lineno" > 1496< / span >   < span class = "keywordtype" > size_t< / span > r0 = 0;< / div >
< div class = "line" > < a name = "l01497" > < / a > < span class = "lineno" > 1497< / span >   < span class = "keywordtype" > size_t< / span > r1 = 0;< / div >
< div class = "line" > < a name = "l01498" > < / a > < span class = "lineno" > 1498< / span >   < / div >
< div class = "line" > < a name = "l01499" > < / a > < span class = "lineno" > 1499< / span >   < span class = "keywordflow" > if< / span > (keep_min) {< / div >
< div class = "line" > < a name = "l01500" > < / a > < span class = "lineno" > 1500< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < k; j++) {< / div >
< div class = "line" > < a name = "l01501" > < / a > < span class = "lineno" > 1501< / span >   < / div >
< div class = "line" > < a name = "l01502" > < / a > < span class = "lineno" > 1502< / span >   < span class = "keywordflow" > if< / span > (lI0[r0] > = 0 & & lD0[r0] < lD1[r1]) {< / div >
< div class = "line" > < a name = "l01503" > < / a > < span class = "lineno" > 1503< / span >   tmpD[j] = lD0[r0];< / div >
< div class = "line" > < a name = "l01504" > < / a > < span class = "lineno" > 1504< / span >   tmpI[j] = lI0[r0];< / div >
< div class = "line" > < a name = "l01505" > < / a > < span class = "lineno" > 1505< / span >   r0++;< / div >
< div class = "line" > < a name = "l01506" > < / a > < span class = "lineno" > 1506< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (lD1[r1] > = 0) {< / div >
< div class = "line" > < a name = "l01507" > < / a > < span class = "lineno" > 1507< / span >   tmpD[j] = lD1[r1];< / div >
< div class = "line" > < a name = "l01508" > < / a > < span class = "lineno" > 1508< / span >   tmpI[j] = lI1[r1] + translation;< / div >
< div class = "line" > < a name = "l01509" > < / a > < span class = "lineno" > 1509< / span >   r1++;< / div >
< div class = "line" > < a name = "l01510" > < / a > < span class = "lineno" > 1510< / span >   } < span class = "keywordflow" > else< / span > { < span class = "comment" > // both are NaNs< / span > < / div >
< div class = "line" > < a name = "l01511" > < / a > < span class = "lineno" > 1511< / span >   tmpD[j] = NAN;< / div >
< div class = "line" > < a name = "l01512" > < / a > < span class = "lineno" > 1512< / span >   tmpI[j] = -1;< / div >
< div class = "line" > < a name = "l01513" > < / a > < span class = "lineno" > 1513< / span >   }< / div >
< div class = "line" > < a name = "l01514" > < / a > < span class = "lineno" > 1514< / span >   }< / div >
< div class = "line" > < a name = "l01515" > < / a > < span class = "lineno" > 1515< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01516" > < / a > < span class = "lineno" > 1516< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < k; j++) {< / div >
< div class = "line" > < a name = "l01517" > < / a > < span class = "lineno" > 1517< / span >   < span class = "keywordflow" > if< / span > (lI0[r0] > = 0 & & lD0[r0] > lD1[r1]) {< / div >
< div class = "line" > < a name = "l01518" > < / a > < span class = "lineno" > 1518< / span >   tmpD[j] = lD0[r0];< / div >
< div class = "line" > < a name = "l01519" > < / a > < span class = "lineno" > 1519< / span >   tmpI[j] = lI0[r0];< / div >
< div class = "line" > < a name = "l01520" > < / a > < span class = "lineno" > 1520< / span >   r0++;< / div >
< div class = "line" > < a name = "l01521" > < / a > < span class = "lineno" > 1521< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (lD1[r1] > = 0) {< / div >
< div class = "line" > < a name = "l01522" > < / a > < span class = "lineno" > 1522< / span >   tmpD[j] = lD1[r1];< / div >
< div class = "line" > < a name = "l01523" > < / a > < span class = "lineno" > 1523< / span >   tmpI[j] = lI1[r1] + translation;< / div >
< div class = "line" > < a name = "l01524" > < / a > < span class = "lineno" > 1524< / span >   r1++;< / div >
< div class = "line" > < a name = "l01525" > < / a > < span class = "lineno" > 1525< / span >   } < span class = "keywordflow" > else< / span > { < span class = "comment" > // both are NaNs< / span > < / div >
< div class = "line" > < a name = "l01526" > < / a > < span class = "lineno" > 1526< / span >   tmpD[j] = NAN;< / div >
< div class = "line" > < a name = "l01527" > < / a > < span class = "lineno" > 1527< / span >   tmpI[j] = -1;< / div >
< div class = "line" > < a name = "l01528" > < / a > < span class = "lineno" > 1528< / span >   }< / div >
< div class = "line" > < a name = "l01529" > < / a > < span class = "lineno" > 1529< / span >   }< / div >
< div class = "line" > < a name = "l01530" > < / a > < span class = "lineno" > 1530< / span >   }< / div >
< div class = "line" > < a name = "l01531" > < / a > < span class = "lineno" > 1531< / span >   n1 += r1;< / div >
< div class = "line" > < a name = "l01532" > < / a > < span class = "lineno" > 1532< / span >   memcpy (lD0, tmpD.data(), < span class = "keyword" > sizeof< / span > (lD0[0]) * k);< / div >
< div class = "line" > < a name = "l01533" > < / a > < span class = "lineno" > 1533< / span >   memcpy (lI0, tmpI.data(), < span class = "keyword" > sizeof< / span > (lI0[0]) * k);< / div >
< div class = "line" > < a name = "l01534" > < / a > < span class = "lineno" > 1534< / span >   }< / div >
< div class = "line" > < a name = "l01535" > < / a > < span class = "lineno" > 1535< / span >   }< / div >
< div class = "line" > < a name = "l01536" > < / a > < span class = "lineno" > 1536< / span >   < / div >
< div class = "line" > < a name = "l01537" > < / a > < span class = "lineno" > 1537< / span >   < span class = "keywordflow" > return< / span > n1;< / div >
< div class = "line" > < a name = "l01538" > < / a > < span class = "lineno" > 1538< / span >   }< / div >
< div class = "line" > < a name = "l01539" > < / a > < span class = "lineno" > 1539< / span >   < / div >
< div class = "line" > < a name = "l01540" > < / a > < span class = "lineno" > 1540< / span >   < / div >
< div class = "line" > < a name = "l01541" > < / a > < span class = "lineno" > 1541< / span >   < / div >
< div class = "line" > < a name = "l01542" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a8dbc652ba48d41f126b8815004899448" > 1542< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "namespacefaiss.html#a8dbc652ba48d41f126b8815004899448" > ranklist_intersection_size< / a > (< span class = "keywordtype" > size_t< / span > k1, < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > *v1,< / div >
< div class = "line" > < a name = "l01543" > < / a > < span class = "lineno" > 1543< / span >   < span class = "keywordtype" > size_t< / span > k2, < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > *v2_in)< / div >
< div class = "line" > < a name = "l01544" > < / a > < span class = "lineno" > 1544< / span >   {< / div >
< div class = "line" > < a name = "l01545" > < / a > < span class = "lineno" > 1545< / span >   < span class = "keywordflow" > if< / span > (k2 > k1) < span class = "keywordflow" > return< / span > < a class = "code" href = "namespacefaiss.html#a8dbc652ba48d41f126b8815004899448" > ranklist_intersection_size< / a > (k2, v2_in, k1, v1);< / div >
< div class = "line" > < a name = "l01546" > < / a > < span class = "lineno" > 1546< / span >   < span class = "keywordtype" > long< / span > *v2 = < span class = "keyword" > new< / span > < span class = "keywordtype" > long< / span > [k2];< / div >
< div class = "line" > < a name = "l01547" > < / a > < span class = "lineno" > 1547< / span >   memcpy (v2, v2_in, < span class = "keyword" > sizeof< / span > (< span class = "keywordtype" > long< / span > ) * k2);< / div >
< div class = "line" > < a name = "l01548" > < / a > < span class = "lineno" > 1548< / span >   std::sort (v2, v2 + k2);< / div >
< div class = "line" > < a name = "l01549" > < / a > < span class = "lineno" > 1549< / span >   { < span class = "comment" > // de-dup v2< / span > < / div >
< div class = "line" > < a name = "l01550" > < / a > < span class = "lineno" > 1550< / span >   < span class = "keywordtype" > long< / span > prev = -1;< / div >
< div class = "line" > < a name = "l01551" > < / a > < span class = "lineno" > 1551< / span >   < span class = "keywordtype" > size_t< / span > wp = 0;< / div >
< div class = "line" > < a name = "l01552" > < / a > < span class = "lineno" > 1552< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < k2; i++) {< / div >
< div class = "line" > < a name = "l01553" > < / a > < span class = "lineno" > 1553< / span >   < span class = "keywordflow" > if< / span > (v2 [i] != prev) {< / div >
< div class = "line" > < a name = "l01554" > < / a > < span class = "lineno" > 1554< / span >   v2[wp++] = prev = v2 [i];< / div >
< div class = "line" > < a name = "l01555" > < / a > < span class = "lineno" > 1555< / span >   }< / div >
< div class = "line" > < a name = "l01556" > < / a > < span class = "lineno" > 1556< / span >   }< / div >
< div class = "line" > < a name = "l01557" > < / a > < span class = "lineno" > 1557< / span >   k2 = wp;< / div >
< div class = "line" > < a name = "l01558" > < / a > < span class = "lineno" > 1558< / span >   }< / div >
< div class = "line" > < a name = "l01559" > < / a > < span class = "lineno" > 1559< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > seen_flag = 1L < < 60;< / div >
< div class = "line" > < a name = "l01560" > < / a > < span class = "lineno" > 1560< / span >   < span class = "keywordtype" > size_t< / span > count = 0;< / div >
< div class = "line" > < a name = "l01561" > < / a > < span class = "lineno" > 1561< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < k1; i++) {< / div >
< div class = "line" > < a name = "l01562" > < / a > < span class = "lineno" > 1562< / span >   < span class = "keywordtype" > long< / span > q = v1 [i];< / div >
< div class = "line" > < a name = "l01563" > < / a > < span class = "lineno" > 1563< / span >   < span class = "keywordtype" > size_t< / span > i0 = 0, i1 = k2;< / div >
< div class = "line" > < a name = "l01564" > < / a > < span class = "lineno" > 1564< / span >   < span class = "keywordflow" > while< / span > (i0 + 1 < i1) {< / div >
< div class = "line" > < a name = "l01565" > < / a > < span class = "lineno" > 1565< / span >   < span class = "keywordtype" > size_t< / span > imed = (i1 + i0) / 2;< / div >
< div class = "line" > < a name = "l01566" > < / a > < span class = "lineno" > 1566< / span >   < span class = "keywordtype" > long< / span > piv = v2 [imed] & ~seen_flag;< / div >
< div class = "line" > < a name = "l01567" > < / a > < span class = "lineno" > 1567< / span >   < span class = "keywordflow" > if< / span > (piv < = q) i0 = imed;< / div >
< div class = "line" > < a name = "l01568" > < / a > < span class = "lineno" > 1568< / span >   < span class = "keywordflow" > else< / span > i1 = imed;< / div >
< div class = "line" > < a name = "l01569" > < / a > < span class = "lineno" > 1569< / span >   }< / div >
< div class = "line" > < a name = "l01570" > < / a > < span class = "lineno" > 1570< / span >   < span class = "keywordflow" > if< / span > (v2 [i0] == q) {< / div >
< div class = "line" > < a name = "l01571" > < / a > < span class = "lineno" > 1571< / span >   count++;< / div >
< div class = "line" > < a name = "l01572" > < / a > < span class = "lineno" > 1572< / span >   v2 [i0] |= seen_flag;< / div >
< div class = "line" > < a name = "l01573" > < / a > < span class = "lineno" > 1573< / span >   }< / div >
< div class = "line" > < a name = "l01574" > < / a > < span class = "lineno" > 1574< / span >   }< / div >
< div class = "line" > < a name = "l01575" > < / a > < span class = "lineno" > 1575< / span >   < span class = "keyword" > delete< / span > [] v2;< / div >
< div class = "line" > < a name = "l01576" > < / a > < span class = "lineno" > 1576< / span >   < / div >
< div class = "line" > < a name = "l01577" > < / a > < span class = "lineno" > 1577< / span >   < span class = "keywordflow" > return< / span > count;< / div >
< div class = "line" > < a name = "l01578" > < / a > < span class = "lineno" > 1578< / span >   }< / div >
< div class = "line" > < a name = "l01579" > < / a > < span class = "lineno" > 1579< / span >   < / div >
< div class = "line" > < a name = "l01580" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a94c1d99ac39d22e362aa27ce7c7ff714" > 1580< / a > < / span >   < span class = "keywordtype" > double< / span > < a class = "code" href = "namespacefaiss.html#a94c1d99ac39d22e362aa27ce7c7ff714" > imbalance_factor< / a > (< span class = "keywordtype" > int< / span > k, < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > *hist) {< / div >
< div class = "line" > < a name = "l01581" > < / a > < span class = "lineno" > 1581< / span >   < span class = "keywordtype" > double< / span > tot = 0, uf = 0;< / div >
< div class = "line" > < a name = "l01582" > < / a > < span class = "lineno" > 1582< / span >   < / div >
< div class = "line" > < a name = "l01583" > < / a > < span class = "lineno" > 1583< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0 ; i < k ; i++) {< / div >
< div class = "line" > < a name = "l01584" > < / a > < span class = "lineno" > 1584< / span >   tot += hist[i];< / div >
< div class = "line" > < a name = "l01585" > < / a > < span class = "lineno" > 1585< / span >   uf += hist[i] * (double) hist[i];< / div >
< div class = "line" > < a name = "l01586" > < / a > < span class = "lineno" > 1586< / span >   }< / div >
< div class = "line" > < a name = "l01587" > < / a > < span class = "lineno" > 1587< / span >   uf = uf * k / (tot * tot);< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01588" > < / a > < span class = "lineno" > 1588< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01589" > < / a > < span class = "lineno" > 1589< / span >   < span class = "keywordflow" > return< / span > uf;< / div >
< div class = "line" > < a name = "l01590" > < / a > < span class = "lineno" > 1590< / span >   }< / div >
< div class = "line" > < a name = "l01591" > < / a > < span class = "lineno" > 1591< / span >   < / div >
< div class = "line" > < a name = "l01592" > < / a > < span class = "lineno" > 1592< / span >   < / div >
< div class = "line" > < a name = "l01593" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#af762526714e6138009c72aee98657538" > 1593< / a > < / span >   < span class = "keywordtype" > double< / span > < a class = "code" href = "namespacefaiss.html#a94c1d99ac39d22e362aa27ce7c7ff714" > imbalance_factor< / a > (< span class = "keywordtype" > int< / span > n, < span class = "keywordtype" > int< / span > k, < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > *assign) {< / div >
< div class = "line" > < a name = "l01594" > < / a > < span class = "lineno" > 1594< / span >   std::vector< int> hist(k, 0);< / div >
< div class = "line" > < a name = "l01595" > < / a > < span class = "lineno" > 1595< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n; i++) {< / div >
< div class = "line" > < a name = "l01596" > < / a > < span class = "lineno" > 1596< / span >   hist[assign[i]]++;< / div >
< div class = "line" > < a name = "l01597" > < / a > < span class = "lineno" > 1597< / span >   }< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l01598" > < / a > < span class = "lineno" > 1598< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01599" > < / a > < span class = "lineno" > 1599< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "namespacefaiss.html#a94c1d99ac39d22e362aa27ce7c7ff714" > imbalance_factor< / a > (k, hist.data());< / div >
< div class = "line" > < a name = "l01600" > < / a > < span class = "lineno" > 1600< / span >   }< / div >
< div class = "line" > < a name = "l01601" > < / a > < span class = "lineno" > 1601< / span >   < / div >
< div class = "line" > < a name = "l01602" > < / a > < span class = "lineno" > 1602< / span >   < / div >
< div class = "line" > < a name = "l01603" > < / a > < span class = "lineno" > 1603< / span >   < / div >
< div class = "line" > < a name = "l01604" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a7bea462108bee98d8d5859b51ec4db8e" > 1604< / a > < / span >   < span class = "keywordtype" > int< / span > < a class = "code" href = "namespacefaiss.html#a7bea462108bee98d8d5859b51ec4db8e" > ivec_hist< / a > (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > * v, < span class = "keywordtype" > int< / span > vmax, < span class = "keywordtype" > int< / span > *hist) {< / div >
< div class = "line" > < a name = "l01605" > < / a > < span class = "lineno" > 1605< / span >   memset (hist, 0, < span class = "keyword" > sizeof< / span > (hist[0]) * vmax);< / div >
< div class = "line" > < a name = "l01606" > < / a > < span class = "lineno" > 1606< / span >   < span class = "keywordtype" > int< / span > nout = 0;< / div >
< div class = "line" > < a name = "l01607" > < / a > < span class = "lineno" > 1607< / span >   < span class = "keywordflow" > while< / span > (n--) {< / div >
< div class = "line" > < a name = "l01608" > < / a > < span class = "lineno" > 1608< / span >   < span class = "keywordflow" > if< / span > (v[n] < 0 || v[n] > = vmax) nout++;< / div >
< div class = "line" > < a name = "l01609" > < / a > < span class = "lineno" > 1609< / span >   < span class = "keywordflow" > else< / span > hist[v[n]]++;< / div >
< div class = "line" > < a name = "l01610" > < / a > < span class = "lineno" > 1610< / span >   }< / div >
< div class = "line" > < a name = "l01611" > < / a > < span class = "lineno" > 1611< / span >   < span class = "keywordflow" > return< / span > nout;< / div >
< div class = "line" > < a name = "l01612" > < / a > < span class = "lineno" > 1612< / span >   }< / div >
< div class = "line" > < a name = "l01613" > < / a > < span class = "lineno" > 1613< / span >   < / div >
< div class = "line" > < a name = "l01614" > < / a > < span class = "lineno" > 1614< / span >   < / div >
< div class = "line" > < a name = "l01615" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a154a47857ed321b9db91122770a16e09" > 1615< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#a154a47857ed321b9db91122770a16e09" > bincode_hist< / a > (< span class = "keywordtype" > size_t< / span > n, < span class = "keywordtype" > size_t< / span > nbits, < span class = "keyword" > const< / span > uint8_t *codes, < span class = "keywordtype" > int< / span > *hist)< / div >
< div class = "line" > < a name = "l01616" > < / a > < span class = "lineno" > 1616< / span >   {< / div >
< div class = "line" > < a name = "l01617" > < / a > < span class = "lineno" > 1617< / span >   FAISS_THROW_IF_NOT (nbits % 8 == 0);< / div >
< div class = "line" > < a name = "l01618" > < / a > < span class = "lineno" > 1618< / span >   < span class = "keywordtype" > size_t< / span > d = nbits / 8;< / div >
< div class = "line" > < a name = "l01619" > < / a > < span class = "lineno" > 1619< / span >   std::vector< int> accu(d * 256);< / div >
< div class = "line" > < a name = "l01620" > < / a > < span class = "lineno" > 1620< / span >   < span class = "keyword" > const< / span > uint8_t *c = codes;< / div >
< div class = "line" > < a name = "l01621" > < / a > < span class = "lineno" > 1621< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++)< / div >
< div class = "line" > < a name = "l01622" > < / a > < span class = "lineno" > 1622< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 0; j < d; j++)< / div >
< div class = "line" > < a name = "l01623" > < / a > < span class = "lineno" > 1623< / span >   accu[j * 256 + *c++]++;< / div >
< div class = "line" > < a name = "l01624" > < / a > < span class = "lineno" > 1624< / span >   memset (hist, 0, < span class = "keyword" > sizeof< / span > (*hist) * nbits);< / div >
< div class = "line" > < a name = "l01625" > < / a > < span class = "lineno" > 1625< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < d; i++) {< / div >
< div class = "line" > < a name = "l01626" > < / a > < span class = "lineno" > 1626< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > *ai = accu.data() + i * 256;< / div >
< div class = "line" > < a name = "l01627" > < / a > < span class = "lineno" > 1627< / span >   < span class = "keywordtype" > int< / span > * hi = hist + i * 8;< / div >
< div class = "line" > < a name = "l01628" > < / a > < span class = "lineno" > 1628< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 0; j < 256; j++)< / div >
< div class = "line" > < a name = "l01629" > < / a > < span class = "lineno" > 1629< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > k = 0; k < 8; k++)< / div >
< div class = "line" > < a name = "l01630" > < / a > < span class = "lineno" > 1630< / span >   < span class = "keywordflow" > if< / span > ((j > > k) & 1)< / div >
< div class = "line" > < a name = "l01631" > < / a > < span class = "lineno" > 1631< / span >   hi[k] += ai[j];< / div >
< div class = "line" > < a name = "l01632" > < / a > < span class = "lineno" > 1632< / span >   }< / div >
< div class = "line" > < a name = "l01633" > < / a > < span class = "lineno" > 1633< / span >   < / div >
< div class = "line" > < a name = "l01634" > < / a > < span class = "lineno" > 1634< / span >   }< / div >
< div class = "line" > < a name = "l01635" > < / a > < span class = "lineno" > 1635< / span >   < / div >
< div class = "line" > < a name = "l01636" > < / a > < span class = "lineno" > 1636< / span >   < / div >
< div class = "line" > < a name = "l01637" > < / a > < span class = "lineno" > 1637< / span >   < / div >
< div class = "line" > < a name = "l01638" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a4369329c9dbdfe23e3f35d09ba7b5c6e" > 1638< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "namespacefaiss.html#a4369329c9dbdfe23e3f35d09ba7b5c6e" > ivec_checksum< / a > (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > *a)< / div >
< div class = "line" > < a name = "l01639" > < / a > < span class = "lineno" > 1639< / span >   {< / div >
< div class = "line" > < a name = "l01640" > < / a > < span class = "lineno" > 1640< / span >   < span class = "keywordtype" > size_t< / span > cs = 112909;< / div >
< div class = "line" > < a name = "l01641" > < / a > < span class = "lineno" > 1641< / span >   < span class = "keywordflow" > while< / span > (n--) cs = cs * 65713 + a[n] * 1686049;< / div >
< div class = "line" > < a name = "l01642" > < / a > < span class = "lineno" > 1642< / span >   < span class = "keywordflow" > return< / span > cs;< / div >
< div class = "line" > < a name = "l01643" > < / a > < span class = "lineno" > 1643< / span >   }< / div >
< div class = "line" > < a name = "l01644" > < / a > < span class = "lineno" > 1644< / span >   < / div >
< div class = "line" > < a name = "l01645" > < / a > < span class = "lineno" > 1645< / span >   < / div >
< div class = "line" > < a name = "l01646" > < / a > < span class = "lineno" > 1646< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l01647" > < / a > < span class = "lineno" > 1647< / span >   < span class = "keyword" > struct < / span > ArgsortComparator {< / div >
< div class = "line" > < a name = "l01648" > < / a > < span class = "lineno" > 1648< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *vals;< / div >
< div class = "line" > < a name = "l01649" > < / a > < span class = "lineno" > 1649< / span >   < span class = "keywordtype" > bool< / span > operator() (< span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > a, < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > b)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l01650" > < / a > < span class = "lineno" > 1650< / span >   < span class = "keywordflow" > return< / span > vals[a] < vals[b];< / div >
< div class = "line" > < a name = "l01651" > < / a > < span class = "lineno" > 1651< / span >   }< / div >
< div class = "line" > < a name = "l01652" > < / a > < span class = "lineno" > 1652< / span >   };< / div >
< div class = "line" > < a name = "l01653" > < / a > < span class = "lineno" > 1653< / span >   < / div >
< div class = "line" > < a name = "l01654" > < / a > < span class = "lineno" > 1654< / span >   < span class = "keyword" > struct < / span > SegmentS {< / div >
< div class = "line" > < a name = "l01655" > < / a > < span class = "lineno" > 1655< / span >   < span class = "keywordtype" > size_t< / span > i0; < span class = "comment" > // begin pointer in the permutation array< / span > < / div >
< div class = "line" > < a name = "l01656" > < / a > < span class = "lineno" > 1656< / span >   < span class = "keywordtype" > size_t< / span > i1; < span class = "comment" > // end< / span > < / div >
< div class = "line" > < a name = "l01657" > < / a > < span class = "lineno" > 1657< / span >   < span class = "keywordtype" > size_t< / span > len()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l01658" > < / a > < span class = "lineno" > 1658< / span >   < span class = "keywordflow" > return< / span > i1 - i0;< / div >
< div class = "line" > < a name = "l01659" > < / a > < span class = "lineno" > 1659< / span >   }< / div >
< div class = "line" > < a name = "l01660" > < / a > < span class = "lineno" > 1660< / span >   };< / div >
< div class = "line" > < a name = "l01661" > < / a > < span class = "lineno" > 1661< / span >   < / div >
< div class = "line" > < a name = "l01662" > < / a > < span class = "lineno" > 1662< / span >   < span class = "comment" > // see https://en.wikipedia.org/wiki/Merge_algorithm#Parallel_merge< / span > < / div >
< div class = "line" > < a name = "l01663" > < / a > < span class = "lineno" > 1663< / span >   < span class = "comment" > // extended to > 1 merge thread< / span > < / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l01664" > < / a > < span class = "lineno" > 1664< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01665" > < / a > < span class = "lineno" > 1665< / span >   < span class = "comment" > // merges 2 ranges that should be consecutive on the source into< / span > < / div >
< div class = "line" > < a name = "l01666" > < / a > < span class = "lineno" > 1666< / span >   < span class = "comment" > // the union of the two on the destination< / span > < / div >
< div class = "line" > < a name = "l01667" > < / a > < span class = "lineno" > 1667< / span >   < span class = "keyword" > template< / span > < < span class = "keyword" > typename< / span > T> < / div >
< div class = "line" > < a name = "l01668" > < / a > < span class = "lineno" > 1668< / span >   < span class = "keywordtype" > void< / span > parallel_merge (< span class = "keyword" > const< / span > T *src, T *dst,< / div >
< div class = "line" > < a name = "l01669" > < / a > < span class = "lineno" > 1669< / span >   SegmentS & s1, SegmentS & s2, < span class = "keywordtype" > int< / span > nt,< / div >
< div class = "line" > < a name = "l01670" > < / a > < span class = "lineno" > 1670< / span >   < span class = "keyword" > const< / span > ArgsortComparator & comp) {< / div >
< div class = "line" > < a name = "l01671" > < / a > < span class = "lineno" > 1671< / span >   < span class = "keywordflow" > if< / span > (s2.len() > s1.len()) { < span class = "comment" > // make sure that s1 larger than s2< / span > < / div >
< div class = "line" > < a name = "l01672" > < / a > < span class = "lineno" > 1672< / span >   std::swap(s1, s2);< / div >
< div class = "line" > < a name = "l01673" > < / a > < span class = "lineno" > 1673< / span >   }< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l01674" > < / a > < span class = "lineno" > 1674< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01675" > < / a > < span class = "lineno" > 1675< / span >   < span class = "comment" > // compute sub-ranges for each thread< / span > < / div >
< div class = "line" > < a name = "l01676" > < / a > < span class = "lineno" > 1676< / span >   SegmentS s1s[nt], s2s[nt], sws[nt];< / div >
< div class = "line" > < a name = "l01677" > < / a > < span class = "lineno" > 1677< / span >   s2s[0].i0 = s2.i0;< / div >
< div class = "line" > < a name = "l01678" > < / a > < span class = "lineno" > 1678< / span >   s2s[nt - 1].i1 = s2.i1;< / div >
< div class = "line" > < a name = "l01679" > < / a > < span class = "lineno" > 1679< / span >   < / div >
< div class = "line" > < a name = "l01680" > < / a > < span class = "lineno" > 1680< / span >   < span class = "comment" > // not sure parallel actually helps here< / span > < / div >
< div class = "line" > < a name = "l01681" > < / a > < span class = "lineno" > 1681< / span >   < span class = "preprocessor" > #pragma omp parallel for num_threads(nt)< / span > < / div >
< div class = "line" > < a name = "l01682" > < / a > < span class = "lineno" > 1682< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > t = 0; t < nt; t++) {< / div >
< div class = "line" > < a name = "l01683" > < / a > < span class = "lineno" > 1683< / span >   s1s[t].i0 = s1.i0 + s1.len() * t / nt;< / div >
< div class = "line" > < a name = "l01684" > < / a > < span class = "lineno" > 1684< / span >   s1s[t].i1 = s1.i0 + s1.len() * (t + 1) / nt;< / div >
< div class = "line" > < a name = "l01685" > < / a > < span class = "lineno" > 1685< / span >   < / div >
< div class = "line" > < a name = "l01686" > < / a > < span class = "lineno" > 1686< / span >   < span class = "keywordflow" > if< / span > (t + 1 < nt) {< / div >
< div class = "line" > < a name = "l01687" > < / a > < span class = "lineno" > 1687< / span >   T pivot = src[s1s[t].i1];< / div >
< div class = "line" > < a name = "l01688" > < / a > < span class = "lineno" > 1688< / span >   < span class = "keywordtype" > size_t< / span > i0 = s2.i0, i1 = s2.i1;< / div >
< div class = "line" > < a name = "l01689" > < / a > < span class = "lineno" > 1689< / span >   < span class = "keywordflow" > while< / span > (i0 + 1 < i1) {< / div >
< div class = "line" > < a name = "l01690" > < / a > < span class = "lineno" > 1690< / span >   < span class = "keywordtype" > size_t< / span > imed = (i1 + i0) / 2;< / div >
< div class = "line" > < a name = "l01691" > < / a > < span class = "lineno" > 1691< / span >   < span class = "keywordflow" > if< / span > (comp (pivot, src[imed])) {i1 = imed; }< / div >
< div class = "line" > < a name = "l01692" > < / a > < span class = "lineno" > 1692< / span >   < span class = "keywordflow" > else< / span > {i0 = imed; }< / div >
< div class = "line" > < a name = "l01693" > < / a > < span class = "lineno" > 1693< / span >   }< / div >
< div class = "line" > < a name = "l01694" > < / a > < span class = "lineno" > 1694< / span >   s2s[t].i1 = s2s[t + 1].i0 = i1;< / div >
< div class = "line" > < a name = "l01695" > < / a > < span class = "lineno" > 1695< / span >   }< / div >
< div class = "line" > < a name = "l01696" > < / a > < span class = "lineno" > 1696< / span >   }< / div >
< div class = "line" > < a name = "l01697" > < / a > < span class = "lineno" > 1697< / span >   s1.i0 = std::min(s1.i0, s2.i0);< / div >
< div class = "line" > < a name = "l01698" > < / a > < span class = "lineno" > 1698< / span >   s1.i1 = std::max(s1.i1, s2.i1);< / div >
< div class = "line" > < a name = "l01699" > < / a > < span class = "lineno" > 1699< / span >   s2 = s1;< / div >
< div class = "line" > < a name = "l01700" > < / a > < span class = "lineno" > 1700< / span >   sws[0].i0 = s1.i0;< / div >
< div class = "line" > < a name = "l01701" > < / a > < span class = "lineno" > 1701< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > t = 0; t < nt; t++) {< / div >
< div class = "line" > < a name = "l01702" > < / a > < span class = "lineno" > 1702< / span >   sws[t].i1 = sws[t].i0 + s1s[t].len() + s2s[t].len();< / div >
< div class = "line" > < a name = "l01703" > < / a > < span class = "lineno" > 1703< / span >   < span class = "keywordflow" > if< / span > (t + 1 < nt) {< / div >
< div class = "line" > < a name = "l01704" > < / a > < span class = "lineno" > 1704< / span >   sws[t + 1].i0 = sws[t].i1;< / div >
< div class = "line" > < a name = "l01705" > < / a > < span class = "lineno" > 1705< / span >   }< / div >
< div class = "line" > < a name = "l01706" > < / a > < span class = "lineno" > 1706< / span >   }< / div >
< div class = "line" > < a name = "l01707" > < / a > < span class = "lineno" > 1707< / span >   assert(sws[nt - 1].i1 == s1.i1);< / div >
< div class = "line" > < a name = "l01708" > < / a > < span class = "lineno" > 1708< / span >   < / div >
< div class = "line" > < a name = "l01709" > < / a > < span class = "lineno" > 1709< / span >   < span class = "comment" > // do the actual merging< / span > < / div >
< div class = "line" > < a name = "l01710" > < / a > < span class = "lineno" > 1710< / span >   < span class = "preprocessor" > #pragma omp parallel for num_threads(nt)< / span > < / div >
< div class = "line" > < a name = "l01711" > < / a > < span class = "lineno" > 1711< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > t = 0; t < nt; t++) {< / div >
< div class = "line" > < a name = "l01712" > < / a > < span class = "lineno" > 1712< / span >   SegmentS sw = sws[t];< / div >
< div class = "line" > < a name = "l01713" > < / a > < span class = "lineno" > 1713< / span >   SegmentS s1t = s1s[t];< / div >
< div class = "line" > < a name = "l01714" > < / a > < span class = "lineno" > 1714< / span >   SegmentS s2t = s2s[t];< / div >
< div class = "line" > < a name = "l01715" > < / a > < span class = "lineno" > 1715< / span >   < span class = "keywordflow" > if< / span > (s1t.i0 < s1t.i1 & & s2t.i0 < s2t.i1) {< / div >
< div class = "line" > < a name = "l01716" > < / a > < span class = "lineno" > 1716< / span >   < span class = "keywordflow" > for< / span > (;;) {< / div >
< div class = "line" > < a name = "l01717" > < / a > < span class = "lineno" > 1717< / span >   < span class = "comment" > // assert (sw.len() == s1t.len() + s2t.len());< / span > < / div >
< div class = "line" > < a name = "l01718" > < / a > < span class = "lineno" > 1718< / span >   < span class = "keywordflow" > if< / span > (comp(src[s1t.i0], src[s2t.i0])) {< / div >
< div class = "line" > < a name = "l01719" > < / a > < span class = "lineno" > 1719< / span >   dst[sw.i0++] = src[s1t.i0++];< / div >
< div class = "line" > < a name = "l01720" > < / a > < span class = "lineno" > 1720< / span >   < span class = "keywordflow" > if< / span > (s1t.i0 == s1t.i1) < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l01721" > < / a > < span class = "lineno" > 1721< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01722" > < / a > < span class = "lineno" > 1722< / span >   dst[sw.i0++] = src[s2t.i0++];< / div >
< div class = "line" > < a name = "l01723" > < / a > < span class = "lineno" > 1723< / span >   < span class = "keywordflow" > if< / span > (s2t.i0 == s2t.i1) < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l01724" > < / a > < span class = "lineno" > 1724< / span >   }< / div >
< div class = "line" > < a name = "l01725" > < / a > < span class = "lineno" > 1725< / span >   }< / div >
< div class = "line" > < a name = "l01726" > < / a > < span class = "lineno" > 1726< / span >   }< / div >
< div class = "line" > < a name = "l01727" > < / a > < span class = "lineno" > 1727< / span >   < span class = "keywordflow" > if< / span > (s1t.len() > 0) {< / div >
< div class = "line" > < a name = "l01728" > < / a > < span class = "lineno" > 1728< / span >   assert(s1t.len() == sw.len());< / div >
< div class = "line" > < a name = "l01729" > < / a > < span class = "lineno" > 1729< / span >   memcpy(dst + sw.i0, src + s1t.i0, s1t.len() * < span class = "keyword" > sizeof< / span > (dst[0]));< / div >
< div class = "line" > < a name = "l01730" > < / a > < span class = "lineno" > 1730< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (s2t.len() > 0) {< / div >
< div class = "line" > < a name = "l01731" > < / a > < span class = "lineno" > 1731< / span >   assert(s2t.len() == sw.len());< / div >
< div class = "line" > < a name = "l01732" > < / a > < span class = "lineno" > 1732< / span >   memcpy(dst + sw.i0, src + s2t.i0, s2t.len() * < span class = "keyword" > sizeof< / span > (dst[0]));< / div >
< div class = "line" > < a name = "l01733" > < / a > < span class = "lineno" > 1733< / span >   }< / div >
< div class = "line" > < a name = "l01734" > < / a > < span class = "lineno" > 1734< / span >   }< / div >
< div class = "line" > < a name = "l01735" > < / a > < span class = "lineno" > 1735< / span >   }< / div >
< div class = "line" > < a name = "l01736" > < / a > < span class = "lineno" > 1736< / span >   < / div >
< div class = "line" > < a name = "l01737" > < / a > < span class = "lineno" > 1737< / span >   };< / div >
< div class = "line" > < a name = "l01738" > < / a > < span class = "lineno" > 1738< / span >   < / div >
< div class = "line" > < a name = "l01739" > < / a > < span class = "lineno" > 1739< / span >   < span class = "keywordtype" > void< / span > fvec_argsort (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *vals,< / div >
< div class = "line" > < a name = "l01740" > < / a > < span class = "lineno" > 1740< / span >   < span class = "keywordtype" > size_t< / span > *perm)< / div >
< div class = "line" > < a name = "l01741" > < / a > < span class = "lineno" > 1741< / span >   {< / div >
< div class = "line" > < a name = "l01742" > < / a > < span class = "lineno" > 1742< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++) perm[i] = i;< / div >
< div class = "line" > < a name = "l01743" > < / a > < span class = "lineno" > 1743< / span >   ArgsortComparator comp = {vals};< / div >
< div class = "line" > < a name = "l01744" > < / a > < span class = "lineno" > 1744< / span >   std::sort (perm, perm + n, comp);< / div >
< div class = "line" > < a name = "l01745" > < / a > < span class = "lineno" > 1745< / span >   }< / div >
< div class = "line" > < a name = "l01746" > < / a > < span class = "lineno" > 1746< / span >   < / div >
< div class = "line" > < a name = "l01747" > < / a > < span class = "lineno" > 1747< / span >   < span class = "keywordtype" > void< / span > fvec_argsort_parallel (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *vals,< / div >
< div class = "line" > < a name = "l01748" > < / a > < span class = "lineno" > 1748< / span >   < span class = "keywordtype" > size_t< / span > *perm)< / div >
< div class = "line" > < a name = "l01749" > < / a > < span class = "lineno" > 1749< / span >   {< / div >
< div class = "line" > < a name = "l01750" > < / a > < span class = "lineno" > 1750< / span >   < span class = "keywordtype" > size_t< / span > * perm2 = < span class = "keyword" > new< / span > < span class = "keywordtype" > size_t< / span > [n];< / div >
< div class = "line" > < a name = "l01751" > < / a > < span class = "lineno" > 1751< / span >   < span class = "comment" > // 2 result tables, during merging, flip between them< / span > < / div >
< div class = "line" > < a name = "l01752" > < / a > < span class = "lineno" > 1752< / span >   < span class = "keywordtype" > size_t< / span > *permB = perm2, *permA = perm;< / div >
< div class = "line" > < a name = "l01753" > < / a > < span class = "lineno" > 1753< / span >   < / div >
< div class = "line" > < a name = "l01754" > < / a > < span class = "lineno" > 1754< / span >   < span class = "keywordtype" > int< / span > nt = omp_get_max_threads();< / div >
< div class = "line" > < a name = "l01755" > < / a > < span class = "lineno" > 1755< / span >   { < span class = "comment" > // prepare correct permutation so that the result ends in perm< / span > < / div >
< div class = "line" > < a name = "l01756" > < / a > < span class = "lineno" > 1756< / span >   < span class = "comment" > // at final iteration< / span > < / div >
< div class = "line" > < a name = "l01757" > < / a > < span class = "lineno" > 1757< / span >   < span class = "keywordtype" > int< / span > nseg = nt;< / div >
< div class = "line" > < a name = "l01758" > < / a > < span class = "lineno" > 1758< / span >   < span class = "keywordflow" > while< / span > (nseg > 1) {< / div >
< div class = "line" > < a name = "l01759" > < / a > < span class = "lineno" > 1759< / span >   nseg = (nseg + 1) / 2;< / div >
< div class = "line" > < a name = "l01760" > < / a > < span class = "lineno" > 1760< / span >   std::swap (permA, permB);< / div >
< div class = "line" > < a name = "l01761" > < / a > < span class = "lineno" > 1761< / span >   }< / div >
< div class = "line" > < a name = "l01762" > < / a > < span class = "lineno" > 1762< / span >   }< / div >
< div class = "line" > < a name = "l01763" > < / a > < span class = "lineno" > 1763< / span >   < / div >
< div class = "line" > < a name = "l01764" > < / a > < span class = "lineno" > 1764< / span >   < span class = "preprocessor" > #pragma omp parallel< / span > < / div >
< div class = "line" > < a name = "l01765" > < / a > < span class = "lineno" > 1765< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++) permA[i] = i;< / div >
< div class = "line" > < a name = "l01766" > < / a > < span class = "lineno" > 1766< / span >   < / div >
< div class = "line" > < a name = "l01767" > < / a > < span class = "lineno" > 1767< / span >   ArgsortComparator comp = {vals};< / div >
< div class = "line" > < a name = "l01768" > < / a > < span class = "lineno" > 1768< / span >   < / div >
< div class = "line" > < a name = "l01769" > < / a > < span class = "lineno" > 1769< / span >   SegmentS segs[nt];< / div >
< div class = "line" > < a name = "l01770" > < / a > < span class = "lineno" > 1770< / span >   < / div >
< div class = "line" > < a name = "l01771" > < / a > < span class = "lineno" > 1771< / span >   < span class = "comment" > // independent sorts< / span > < / div >
< div class = "line" > < a name = "l01772" > < / a > < span class = "lineno" > 1772< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l01773" > < / a > < span class = "lineno" > 1773< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > t = 0; t < nt; t++) {< / div >
< div class = "line" > < a name = "l01774" > < / a > < span class = "lineno" > 1774< / span >   < span class = "keywordtype" > size_t< / span > i0 = t * n / nt;< / div >
< div class = "line" > < a name = "l01775" > < / a > < span class = "lineno" > 1775< / span >   < span class = "keywordtype" > size_t< / span > i1 = (t + 1) * n / nt;< / div >
< div class = "line" > < a name = "l01776" > < / a > < span class = "lineno" > 1776< / span >   SegmentS seg = {i0, i1};< / div >
< div class = "line" > < a name = "l01777" > < / a > < span class = "lineno" > 1777< / span >   std::sort (permA + seg.i0, permA + seg.i1, comp);< / div >
< div class = "line" > < a name = "l01778" > < / a > < span class = "lineno" > 1778< / span >   segs[t] = seg;< / div >
< div class = "line" > < a name = "l01779" > < / a > < span class = "lineno" > 1779< / span >   }< / div >
< div class = "line" > < a name = "l01780" > < / a > < span class = "lineno" > 1780< / span >   < span class = "keywordtype" > int< / span > prev_nested = omp_get_nested();< / div >
< div class = "line" > < a name = "l01781" > < / a > < span class = "lineno" > 1781< / span >   omp_set_nested(1);< / div >
< div class = "line" > < a name = "l01782" > < / a > < span class = "lineno" > 1782< / span >   < / div >
< div class = "line" > < a name = "l01783" > < / a > < span class = "lineno" > 1783< / span >   < span class = "keywordtype" > int< / span > nseg = nt;< / div >
< div class = "line" > < a name = "l01784" > < / a > < span class = "lineno" > 1784< / span >   < span class = "keywordflow" > while< / span > (nseg > 1) {< / div >
< div class = "line" > < a name = "l01785" > < / a > < span class = "lineno" > 1785< / span >   < span class = "keywordtype" > int< / span > nseg1 = (nseg + 1) / 2;< / div >
< div class = "line" > < a name = "l01786" > < / a > < span class = "lineno" > 1786< / span >   < span class = "keywordtype" > int< / span > sub_nt = nseg % 2 == 0 ? nt : nt - 1;< / div >
< div class = "line" > < a name = "l01787" > < / a > < span class = "lineno" > 1787< / span >   < span class = "keywordtype" > int< / span > sub_nseg1 = nseg / 2;< / div >
< div class = "line" > < a name = "l01788" > < / a > < span class = "lineno" > 1788< / span >   < / div >
< div class = "line" > < a name = "l01789" > < / a > < span class = "lineno" > 1789< / span >   < span class = "preprocessor" > #pragma omp parallel for num_threads(nseg1)< / span > < / div >
< div class = "line" > < a name = "l01790" > < / a > < span class = "lineno" > 1790< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > s = 0; s < nseg; s += 2) {< / div >
< div class = "line" > < a name = "l01791" > < / a > < span class = "lineno" > 1791< / span >   < span class = "keywordflow" > if< / span > (s + 1 == nseg) { < span class = "comment" > // otherwise isolated segment< / span > < / div >
< div class = "line" > < a name = "l01792" > < / a > < span class = "lineno" > 1792< / span >   memcpy(permB + segs[s].i0, permA + segs[s].i0,< / div >
< div class = "line" > < a name = "l01793" > < / a > < span class = "lineno" > 1793< / span >   segs[s].len() * < span class = "keyword" > sizeof< / span > (< span class = "keywordtype" > size_t< / span > ));< / div >
< div class = "line" > < a name = "l01794" > < / a > < span class = "lineno" > 1794< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l01795" > < / a > < span class = "lineno" > 1795< / span >   < span class = "keywordtype" > int< / span > t0 = s * sub_nt / sub_nseg1;< / div >
< div class = "line" > < a name = "l01796" > < / a > < span class = "lineno" > 1796< / span >   < span class = "keywordtype" > int< / span > t1 = (s + 1) * sub_nt / sub_nseg1;< / div >
< div class = "line" > < a name = "l01797" > < / a > < span class = "lineno" > 1797< / span >   printf(< span class = "stringliteral" > " merge %d %d, %d threads\n" < / span > , s, s + 1, t1 - t0);< / div >
< div class = "line" > < a name = "l01798" > < / a > < span class = "lineno" > 1798< / span >   parallel_merge(permA, permB, segs[s], segs[s + 1],< / div >
< div class = "line" > < a name = "l01799" > < / a > < span class = "lineno" > 1799< / span >   t1 - t0, comp);< / div >
< div class = "line" > < a name = "l01800" > < / a > < span class = "lineno" > 1800< / span >   }< / div >
< div class = "line" > < a name = "l01801" > < / a > < span class = "lineno" > 1801< / span >   }< / div >
< div class = "line" > < a name = "l01802" > < / a > < span class = "lineno" > 1802< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > s = 0; s < nseg; s += 2)< / div >
< div class = "line" > < a name = "l01803" > < / a > < span class = "lineno" > 1803< / span >   segs[s / 2] = segs[s];< / div >
< div class = "line" > < a name = "l01804" > < / a > < span class = "lineno" > 1804< / span >   nseg = nseg1;< / div >
< div class = "line" > < a name = "l01805" > < / a > < span class = "lineno" > 1805< / span >   std::swap (permA, permB);< / div >
< div class = "line" > < a name = "l01806" > < / a > < span class = "lineno" > 1806< / span >   }< / div >
< div class = "line" > < a name = "l01807" > < / a > < span class = "lineno" > 1807< / span >   assert (permA == perm);< / div >
< div class = "line" > < a name = "l01808" > < / a > < span class = "lineno" > 1808< / span >   omp_set_nested(prev_nested);< / div >
< div class = "line" > < a name = "l01809" > < / a > < span class = "lineno" > 1809< / span >   < span class = "keyword" > delete< / span > [] perm2;< / div >
< div class = "line" > < a name = "l01810" > < / a > < span class = "lineno" > 1810< / span >   }< / div >
< div class = "line" > < a name = "l01811" > < / a > < span class = "lineno" > 1811< / span >   < / div >
< div class = "line" > < a name = "l01812" > < / a > < span class = "lineno" > 1812< / span >   < / div >
< div class = "line" > < a name = "l01813" > < / a > < span class = "lineno" > 1813< / span >   < / div >
< div class = "line" > < a name = "l01814" > < / a > < span class = "lineno" > 1814< / span >   < / div >
2017-03-21 01:33:21 +08:00
< div class = "line" > < a name = "l01815" > < / a > < span class = "lineno" > 1815< / span >   < / div >
< div class = "line" > < a name = "l01816" > < / a > < span class = "lineno" > 1816< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l01817" > < / a > < span class = "lineno" > 1817< / span >   < / div >
< div class = "line" > < a name = "l01818" > < / a > < span class = "lineno" > 1818< / span >   < / div >
< div class = "line" > < a name = "l01819" > < / a > < span class = "lineno" > 1819< / span >   < / div >
< div class = "line" > < a name = "l01820" > < / a > < span class = "lineno" > 1820< / span >   < / div >
< div class = "line" > < a name = "l01821" > < / a > < span class = "lineno" > 1821< / span >   < / div >
< div class = "line" > < a name = "l01822" > < / a > < span class = "lineno" > 1822< / span >   < / div >
< div class = "line" > < a name = "l01823" > < / a > < span class = "lineno" > 1823< / span >   < / div >
< div class = "line" > < a name = "l01824" > < / a > < span class = "lineno" > 1824< / span >   < / div >
< div class = "line" > < a name = "l01825" > < / a > < span class = "lineno" > 1825< / span >   < / div >
< div class = "line" > < a name = "l01826" > < / a > < span class = "lineno" > 1826< / span >   < / div >
< div class = "line" > < a name = "l01827" > < / a > < span class = "lineno" > 1827< / span >   < span class = "comment" > /***************************************************************************< / span > < / div >
< div class = "line" > < a name = "l01828" > < / a > < span class = "lineno" > 1828< / span >   < span class = "comment" > * heavily optimized table computations< / span > < / div >
< div class = "line" > < a name = "l01829" > < / a > < span class = "lineno" > 1829< / span >   < span class = "comment" > ***************************************************************************/< / span > < / div >
< div class = "line" > < a name = "l01830" > < / a > < span class = "lineno" > 1830< / span >   < / div >
< div class = "line" > < a name = "l01831" > < / a > < span class = "lineno" > 1831< / span >   < / div >
< div class = "line" > < a name = "l01832" > < / a > < span class = "lineno" > 1832< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > inline< / span > < span class = "keywordtype" > void< / span > fvec_madd_ref (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l01833" > < / a > < span class = "lineno" > 1833< / span >   < span class = "keywordtype" > float< / span > bf, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *b, < span class = "keywordtype" > float< / span > *c) {< / div >
< div class = "line" > < a name = "l01834" > < / a > < span class = "lineno" > 1834< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++)< / div >
< div class = "line" > < a name = "l01835" > < / a > < span class = "lineno" > 1835< / span >   c[i] = a[i] + bf * b[i];< / div >
< div class = "line" > < a name = "l01836" > < / a > < span class = "lineno" > 1836< / span >   }< / div >
< div class = "line" > < a name = "l01837" > < / a > < span class = "lineno" > 1837< / span >   < / div >
< div class = "line" > < a name = "l01838" > < / a > < span class = "lineno" > 1838< / span >   < / div >
< div class = "line" > < a name = "l01839" > < / a > < span class = "lineno" > 1839< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > inline< / span > < span class = "keywordtype" > void< / span > fvec_madd_sse (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l01840" > < / a > < span class = "lineno" > 1840< / span >   < span class = "keywordtype" > float< / span > bf, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *b, < span class = "keywordtype" > float< / span > *c) {< / div >
< div class = "line" > < a name = "l01841" > < / a > < span class = "lineno" > 1841< / span >   n > > = 2;< / div >
< div class = "line" > < a name = "l01842" > < / a > < span class = "lineno" > 1842< / span >   __m128 bf4 = _mm_set_ps1 (bf);< / div >
< div class = "line" > < a name = "l01843" > < / a > < span class = "lineno" > 1843< / span >   __m128 * a4 = (__m128*)a;< / div >
< div class = "line" > < a name = "l01844" > < / a > < span class = "lineno" > 1844< / span >   __m128 * b4 = (__m128*)b;< / div >
< div class = "line" > < a name = "l01845" > < / a > < span class = "lineno" > 1845< / span >   __m128 * c4 = (__m128*)c;< / div >
< div class = "line" > < a name = "l01846" > < / a > < span class = "lineno" > 1846< / span >   < / div >
< div class = "line" > < a name = "l01847" > < / a > < span class = "lineno" > 1847< / span >   < span class = "keywordflow" > while< / span > (n--) {< / div >
< div class = "line" > < a name = "l01848" > < / a > < span class = "lineno" > 1848< / span >   *c4 = _mm_add_ps (*a4, _mm_mul_ps (bf4, *b4));< / div >
< div class = "line" > < a name = "l01849" > < / a > < span class = "lineno" > 1849< / span >   b4++;< / div >
< div class = "line" > < a name = "l01850" > < / a > < span class = "lineno" > 1850< / span >   a4++;< / div >
< div class = "line" > < a name = "l01851" > < / a > < span class = "lineno" > 1851< / span >   c4++;< / div >
< div class = "line" > < a name = "l01852" > < / a > < span class = "lineno" > 1852< / span >   }< / div >
< div class = "line" > < a name = "l01853" > < / a > < span class = "lineno" > 1853< / span >   }< / div >
< div class = "line" > < a name = "l01854" > < / a > < span class = "lineno" > 1854< / span >   < / div >
< div class = "line" > < a name = "l01855" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847" > 1855< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847" > fvec_madd< / a > (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l01856" > < / a > < span class = "lineno" > 1856< / span >   < span class = "keywordtype" > float< / span > bf, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *b, < span class = "keywordtype" > float< / span > *c)< / div >
< div class = "line" > < a name = "l01857" > < / a > < span class = "lineno" > 1857< / span >   {< / div >
< div class = "line" > < a name = "l01858" > < / a > < span class = "lineno" > 1858< / span >   < span class = "keywordflow" > if< / span > ((n & 3) == 0 & & < / div >
< div class = "line" > < a name = "l01859" > < / a > < span class = "lineno" > 1859< / span >   ((((< span class = "keywordtype" > long< / span > )a) | ((< span class = "keywordtype" > long< / span > )b) | ((< span class = "keywordtype" > long< / span > )c)) & 15) == 0)< / div >
< div class = "line" > < a name = "l01860" > < / a > < span class = "lineno" > 1860< / span >   fvec_madd_sse (n, a, bf, b, c);< / div >
< div class = "line" > < a name = "l01861" > < / a > < span class = "lineno" > 1861< / span >   < span class = "keywordflow" > else< / span > < / div >
< div class = "line" > < a name = "l01862" > < / a > < span class = "lineno" > 1862< / span >   fvec_madd_ref (n, a, bf, b, c);< / div >
< div class = "line" > < a name = "l01863" > < / a > < span class = "lineno" > 1863< / span >   }< / div >
< div class = "line" > < a name = "l01864" > < / a > < span class = "lineno" > 1864< / span >   < / div >
< div class = "line" > < a name = "l01865" > < / a > < span class = "lineno" > 1865< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > inline< / span > < span class = "keywordtype" > int< / span > fvec_madd_and_argmin_ref (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l01866" > < / a > < span class = "lineno" > 1866< / span >   < span class = "keywordtype" > float< / span > bf, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *b, < span class = "keywordtype" > float< / span > *c) {< / div >
< div class = "line" > < a name = "l01867" > < / a > < span class = "lineno" > 1867< / span >   < span class = "keywordtype" > float< / span > vmin = 1e20;< / div >
< div class = "line" > < a name = "l01868" > < / a > < span class = "lineno" > 1868< / span >   < span class = "keywordtype" > int< / span > imin = -1;< / div >
< div class = "line" > < a name = "l01869" > < / a > < span class = "lineno" > 1869< / span >   < / div >
< div class = "line" > < a name = "l01870" > < / a > < span class = "lineno" > 1870< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i++) {< / div >
< div class = "line" > < a name = "l01871" > < / a > < span class = "lineno" > 1871< / span >   c[i] = a[i] + bf * b[i];< / div >
< div class = "line" > < a name = "l01872" > < / a > < span class = "lineno" > 1872< / span >   < span class = "keywordflow" > if< / span > (c[i] < vmin) {< / div >
< div class = "line" > < a name = "l01873" > < / a > < span class = "lineno" > 1873< / span >   vmin = c[i];< / div >
< div class = "line" > < a name = "l01874" > < / a > < span class = "lineno" > 1874< / span >   imin = i;< / div >
< div class = "line" > < a name = "l01875" > < / a > < span class = "lineno" > 1875< / span >   }< / div >
< div class = "line" > < a name = "l01876" > < / a > < span class = "lineno" > 1876< / span >   }< / div >
< div class = "line" > < a name = "l01877" > < / a > < span class = "lineno" > 1877< / span >   < span class = "keywordflow" > return< / span > imin;< / div >
< div class = "line" > < a name = "l01878" > < / a > < span class = "lineno" > 1878< / span >   }< / div >
< div class = "line" > < a name = "l01879" > < / a > < span class = "lineno" > 1879< / span >   < / div >
< div class = "line" > < a name = "l01880" > < / a > < span class = "lineno" > 1880< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > inline< / span > < span class = "keywordtype" > int< / span > fvec_madd_and_argmin_sse (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l01881" > < / a > < span class = "lineno" > 1881< / span >   < span class = "keywordtype" > float< / span > bf, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *b, < span class = "keywordtype" > float< / span > *c) {< / div >
< div class = "line" > < a name = "l01882" > < / a > < span class = "lineno" > 1882< / span >   n > > = 2;< / div >
< div class = "line" > < a name = "l01883" > < / a > < span class = "lineno" > 1883< / span >   __m128 bf4 = _mm_set_ps1 (bf);< / div >
< div class = "line" > < a name = "l01884" > < / a > < span class = "lineno" > 1884< / span >   __m128 vmin4 = _mm_set_ps1 (1e20);< / div >
< div class = "line" > < a name = "l01885" > < / a > < span class = "lineno" > 1885< / span >   __m128i imin4 = _mm_set1_epi32 (-1);< / div >
< div class = "line" > < a name = "l01886" > < / a > < span class = "lineno" > 1886< / span >   __m128i idx4 = _mm_set_epi32 (3, 2, 1, 0);< / div >
< div class = "line" > < a name = "l01887" > < / a > < span class = "lineno" > 1887< / span >   __m128i inc4 = _mm_set1_epi32 (4);< / div >
< div class = "line" > < a name = "l01888" > < / a > < span class = "lineno" > 1888< / span >   __m128 * a4 = (__m128*)a;< / div >
< div class = "line" > < a name = "l01889" > < / a > < span class = "lineno" > 1889< / span >   __m128 * b4 = (__m128*)b;< / div >
< div class = "line" > < a name = "l01890" > < / a > < span class = "lineno" > 1890< / span >   __m128 * c4 = (__m128*)c;< / div >
< div class = "line" > < a name = "l01891" > < / a > < span class = "lineno" > 1891< / span >   < / div >
< div class = "line" > < a name = "l01892" > < / a > < span class = "lineno" > 1892< / span >   < span class = "keywordflow" > while< / span > (n--) {< / div >
< div class = "line" > < a name = "l01893" > < / a > < span class = "lineno" > 1893< / span >   __m128 vc4 = _mm_add_ps (*a4, _mm_mul_ps (bf4, *b4));< / div >
< div class = "line" > < a name = "l01894" > < / a > < span class = "lineno" > 1894< / span >   *c4 = vc4;< / div >
< div class = "line" > < a name = "l01895" > < / a > < span class = "lineno" > 1895< / span >   __m128i mask = (__m128i)_mm_cmpgt_ps (vmin4, vc4);< / div >
< div class = "line" > < a name = "l01896" > < / a > < span class = "lineno" > 1896< / span >   < span class = "comment" > // imin4 = _mm_blendv_epi8 (imin4, idx4, mask); // slower!< / span > < / div >
< div class = "line" > < a name = "l01897" > < / a > < span class = "lineno" > 1897< / span >   < / div >
< div class = "line" > < a name = "l01898" > < / a > < span class = "lineno" > 1898< / span >   imin4 = _mm_or_si128 (_mm_and_si128 (mask, idx4),< / div >
< div class = "line" > < a name = "l01899" > < / a > < span class = "lineno" > 1899< / span >   _mm_andnot_si128 (mask, imin4));< / div >
< div class = "line" > < a name = "l01900" > < / a > < span class = "lineno" > 1900< / span >   vmin4 = _mm_min_ps (vmin4, vc4);< / div >
< div class = "line" > < a name = "l01901" > < / a > < span class = "lineno" > 1901< / span >   b4++;< / div >
< div class = "line" > < a name = "l01902" > < / a > < span class = "lineno" > 1902< / span >   a4++;< / div >
< div class = "line" > < a name = "l01903" > < / a > < span class = "lineno" > 1903< / span >   c4++;< / div >
< div class = "line" > < a name = "l01904" > < / a > < span class = "lineno" > 1904< / span >   idx4 = _mm_add_epi32 (idx4, inc4);< / div >
< div class = "line" > < a name = "l01905" > < / a > < span class = "lineno" > 1905< / span >   }< / div >
< div class = "line" > < a name = "l01906" > < / a > < span class = "lineno" > 1906< / span >   < / div >
< div class = "line" > < a name = "l01907" > < / a > < span class = "lineno" > 1907< / span >   < span class = "comment" > // 4 values -> 2< / span > < / div >
< div class = "line" > < a name = "l01908" > < / a > < span class = "lineno" > 1908< / span >   {< / div >
< div class = "line" > < a name = "l01909" > < / a > < span class = "lineno" > 1909< / span >   idx4 = _mm_shuffle_epi32 (imin4, 3 < < 2 | 2);< / div >
< div class = "line" > < a name = "l01910" > < / a > < span class = "lineno" > 1910< / span >   __m128 vc4 = _mm_shuffle_ps (vmin4, vmin4, 3 < < 2 | 2);< / div >
< div class = "line" > < a name = "l01911" > < / a > < span class = "lineno" > 1911< / span >   __m128i mask = (__m128i)_mm_cmpgt_ps (vmin4, vc4);< / div >
< div class = "line" > < a name = "l01912" > < / a > < span class = "lineno" > 1912< / span >   imin4 = _mm_or_si128 (_mm_and_si128 (mask, idx4),< / div >
< div class = "line" > < a name = "l01913" > < / a > < span class = "lineno" > 1913< / span >   _mm_andnot_si128 (mask, imin4));< / div >
< div class = "line" > < a name = "l01914" > < / a > < span class = "lineno" > 1914< / span >   vmin4 = _mm_min_ps (vmin4, vc4);< / div >
< div class = "line" > < a name = "l01915" > < / a > < span class = "lineno" > 1915< / span >   }< / div >
< div class = "line" > < a name = "l01916" > < / a > < span class = "lineno" > 1916< / span >   < span class = "comment" > // 2 values -> 1< / span > < / div >
< div class = "line" > < a name = "l01917" > < / a > < span class = "lineno" > 1917< / span >   {< / div >
< div class = "line" > < a name = "l01918" > < / a > < span class = "lineno" > 1918< / span >   idx4 = _mm_shuffle_epi32 (imin4, 1);< / div >
< div class = "line" > < a name = "l01919" > < / a > < span class = "lineno" > 1919< / span >   __m128 vc4 = _mm_shuffle_ps (vmin4, vmin4, 1);< / div >
< div class = "line" > < a name = "l01920" > < / a > < span class = "lineno" > 1920< / span >   __m128i mask = (__m128i)_mm_cmpgt_ps (vmin4, vc4);< / div >
< div class = "line" > < a name = "l01921" > < / a > < span class = "lineno" > 1921< / span >   imin4 = _mm_or_si128 (_mm_and_si128 (mask, idx4),< / div >
< div class = "line" > < a name = "l01922" > < / a > < span class = "lineno" > 1922< / span >   _mm_andnot_si128 (mask, imin4));< / div >
< div class = "line" > < a name = "l01923" > < / a > < span class = "lineno" > 1923< / span >   < span class = "comment" > // vmin4 = _mm_min_ps (vmin4, vc4);< / span > < / div >
< div class = "line" > < a name = "l01924" > < / a > < span class = "lineno" > 1924< / span >   }< / div >
< div class = "line" > < a name = "l01925" > < / a > < span class = "lineno" > 1925< / span >   < span class = "keywordflow" > return< / span > _mm_extract_epi32 (imin4, 0);< / div >
< div class = "line" > < a name = "l01926" > < / a > < span class = "lineno" > 1926< / span >   }< / div >
< div class = "line" > < a name = "l01927" > < / a > < span class = "lineno" > 1927< / span >   < / div >
< div class = "line" > < a name = "l01928" > < / a > < span class = "lineno" > 1928< / span >   < / div >
< div class = "line" > < a name = "l01929" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a9da63b8bb84460f5e8ccf8e17622cc7a" > 1929< / a > < / span >   < span class = "keywordtype" > int< / span > < a class = "code" href = "namespacefaiss.html#a9da63b8bb84460f5e8ccf8e17622cc7a" > fvec_madd_and_argmin< / a > (< span class = "keywordtype" > size_t< / span > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *a,< / div >
< div class = "line" > < a name = "l01930" > < / a > < span class = "lineno" > 1930< / span >   < span class = "keywordtype" > float< / span > bf, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *b, < span class = "keywordtype" > float< / span > *c)< / div >
< div class = "line" > < a name = "l01931" > < / a > < span class = "lineno" > 1931< / span >   {< / div >
< div class = "line" > < a name = "l01932" > < / a > < span class = "lineno" > 1932< / span >   < span class = "keywordflow" > if< / span > ((n & 3) == 0 & & < / div >
< div class = "line" > < a name = "l01933" > < / a > < span class = "lineno" > 1933< / span >   ((((< span class = "keywordtype" > long< / span > )a) | ((< span class = "keywordtype" > long< / span > )b) | ((< span class = "keywordtype" > long< / span > )c)) & 15) == 0)< / div >
< div class = "line" > < a name = "l01934" > < / a > < span class = "lineno" > 1934< / span >   < span class = "keywordflow" > return< / span > fvec_madd_and_argmin_sse (n, a, bf, b, c);< / div >
< div class = "line" > < a name = "l01935" > < / a > < span class = "lineno" > 1935< / span >   < span class = "keywordflow" > else< / span > < / div >
< div class = "line" > < a name = "l01936" > < / a > < span class = "lineno" > 1936< / span >   < span class = "keywordflow" > return< / span > fvec_madd_and_argmin_ref (n, a, bf, b, c);< / div >
< div class = "line" > < a name = "l01937" > < / a > < span class = "lineno" > 1937< / span >   }< / div >
< div class = "line" > < a name = "l01938" > < / a > < span class = "lineno" > 1938< / span >   < / div >
< div class = "line" > < a name = "l01939" > < / a > < span class = "lineno" > 1939< / span >   < / div >
< div class = "line" > < a name = "l01940" > < / a > < span class = "lineno" > 1940< / span >   < / div >
< div class = "line" > < a name = "l01941" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6" > 1941< / a > < / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *< a class = "code" href = "namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6" > fvecs_maybe_subsample< / a > (< / div >
< div class = "line" > < a name = "l01942" > < / a > < span class = "lineno" > 1942< / span >   < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > *n, < span class = "keywordtype" > size_t< / span > nmax, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > *x,< / div >
< div class = "line" > < a name = "l01943" > < / a > < span class = "lineno" > 1943< / span >   < span class = "keywordtype" > bool< / span > verbose, < span class = "keywordtype" > long< / span > seed)< / div >
< div class = "line" > < a name = "l01944" > < / a > < span class = "lineno" > 1944< / span >   {< / div >
< div class = "line" > < a name = "l01945" > < / a > < span class = "lineno" > 1945< / span >   < / div >
< div class = "line" > < a name = "l01946" > < / a > < span class = "lineno" > 1946< / span >   < span class = "keywordflow" > if< / span > (*n < = nmax) < span class = "keywordflow" > return< / span > x; < span class = "comment" > // nothing to do< / span > < / div >
< div class = "line" > < a name = "l01947" > < / a > < span class = "lineno" > 1947< / span >   < / div >
< div class = "line" > < a name = "l01948" > < / a > < span class = "lineno" > 1948< / span >   < span class = "keywordtype" > size_t< / span > n2 = nmax;< / div >
< div class = "line" > < a name = "l01949" > < / a > < span class = "lineno" > 1949< / span >   < span class = "keywordflow" > if< / span > (verbose) {< / div >
< div class = "line" > < a name = "l01950" > < / a > < span class = "lineno" > 1950< / span >   printf (< span class = "stringliteral" > " Input training set too big (max size is %ld), sampling " < / span > < / div >
< div class = "line" > < a name = "l01951" > < / a > < span class = "lineno" > 1951< / span >   < span class = "stringliteral" > " %ld / %ld vectors\n" < / span > , nmax, n2, *n);< / div >
< div class = "line" > < a name = "l01952" > < / a > < span class = "lineno" > 1952< / span >   }< / div >
< div class = "line" > < a name = "l01953" > < / a > < span class = "lineno" > 1953< / span >   std::vector< int> subset (*n);< / div >
< div class = "line" > < a name = "l01954" > < / a > < span class = "lineno" > 1954< / span >   rand_perm (subset.data (), *n, seed);< / div >
< div class = "line" > < a name = "l01955" > < / a > < span class = "lineno" > 1955< / span >   < span class = "keywordtype" > float< / span > *x_subset = < span class = "keyword" > new< / span > < span class = "keywordtype" > float< / span > [n2 * d];< / div >
< div class = "line" > < a name = "l01956" > < / a > < span class = "lineno" > 1956< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > long< / span > i = 0; i < n2; i++)< / div >
< div class = "line" > < a name = "l01957" > < / a > < span class = "lineno" > 1957< / span >   memcpy (& x_subset[i * d],< / div >
< div class = "line" > < a name = "l01958" > < / a > < span class = "lineno" > 1958< / span >   & x[subset[i] * < span class = "keywordtype" > size_t< / span > (d)],< / div >
< div class = "line" > < a name = "l01959" > < / a > < span class = "lineno" > 1959< / span >   < span class = "keyword" > sizeof< / span > (x[0]) * d);< / div >
< div class = "line" > < a name = "l01960" > < / a > < span class = "lineno" > 1960< / span >   *n = n2;< / div >
< div class = "line" > < a name = "l01961" > < / a > < span class = "lineno" > 1961< / span >   < span class = "keywordflow" > return< / span > x_subset;< / div >
< div class = "line" > < a name = "l01962" > < / a > < span class = "lineno" > 1962< / span >   }< / div >
< div class = "line" > < a name = "l01963" > < / a > < span class = "lineno" > 1963< / span >   < / div >
< div class = "line" > < a name = "l01964" > < / a > < span class = "lineno" > 1964< / span >   < / div >
< div class = "line" > < a name = "l01965" > < / a > < span class = "lineno" > 1965< / span >   } < span class = "comment" > // namespace faiss< / span > < / div >
< div class = "ttc" id = "structfaiss_1_1RandomGenerator_html" > < div class = "ttname" > < a href = "structfaiss_1_1RandomGenerator.html" > faiss::RandomGenerator< / a > < / div > < div class = "ttdoc" > random generator that can be used in multithreaded contexts < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8h_source.html#l00048" > utils.h:48< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a5eb1701e46123827966f2a56da893d1d" > < div class = "ttname" > < a href = "namespacefaiss.html#a5eb1701e46123827966f2a56da893d1d" > faiss::knn_L2sqr_base_shift< / a > < / div > < div class = "ttdeci" > void knn_L2sqr_base_shift(const float *x, const float *y, size_t d, size_t nx, size_t ny, float_maxheap_array_t *res, const float *base_shift)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00955" > utils.cpp:955< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1RandomGenerator_html_a7633c373153f3b2824d2d99382ba20ab" > < div class = "ttname" > < a href = "structfaiss_1_1RandomGenerator.html#a7633c373153f3b2824d2d99382ba20ab" > faiss::RandomGenerator::RandomGenerator< / a > < / div > < div class = "ttdeci" > RandomGenerator(long seed=1234)< / div > < div class = "ttdoc" > initialize < / div > < / div >
2017-06-21 21:54:28 +08:00
< div class = "ttc" id = "namespacefaiss_html_ad1cfbe51f2d77dc5094e0140f5955165" > < div class = "ttname" > < a href = "namespacefaiss.html#ad1cfbe51f2d77dc5094e0140f5955165" > faiss::km_update_centroids< / a > < / div > < div class = "ttdeci" > int km_update_centroids(const float *x, float *centroids, long *assign, size_t d, size_t k, size_t n)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01369" > utils.cpp:1369< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a7466bd32de31640860393a701eaac5ad" > < div class = "ttname" > < a href = "namespacefaiss.html#a7466bd32de31640860393a701eaac5ad" > faiss::fvec_L2sqr< / a > < / div > < div class = "ttdeci" > float fvec_L2sqr(const float *x, const float *y, size_t d)< / div > < div class = "ttdoc" > Squared L2 distance between two vectors. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00481" > utils.cpp:481< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a154a47857ed321b9db91122770a16e09" > < div class = "ttname" > < a href = "namespacefaiss.html#a154a47857ed321b9db91122770a16e09" > faiss::bincode_hist< / a > < / div > < div class = "ttdeci" > void bincode_hist(size_t n, size_t nbits, const uint8_t *codes, int *hist)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01615" > utils.cpp:1615< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a14884d253128c7af5891a65082ad7dc6" > < div class = "ttname" > < a href = "namespacefaiss.html#a14884d253128c7af5891a65082ad7dc6" > faiss::fvecs_maybe_subsample< / a > < / div > < div class = "ttdeci" > const float * fvecs_maybe_subsample(size_t d, size_t *n, size_t nmax, const float *x, bool verbose, long seed)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01941" > utils.cpp:1941< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_ae0ee1b6fbd3d6da0f1a3550a780ca24c" > < div class = "ttname" > < a href = "namespacefaiss.html#ae0ee1b6fbd3d6da0f1a3550a780ca24c" > faiss::ranklist_handle_ties< / a > < / div > < div class = "ttdeci" > void ranklist_handle_ties(int k, long *idx, const float *dis)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01461" > utils.cpp:1461< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1RandomGenerator_html_ac82a433d7bfa56d750907ba5cf74aed7" > < div class = "ttname" > < a href = "structfaiss_1_1RandomGenerator.html#ac82a433d7bfa56d750907ba5cf74aed7" > faiss::RandomGenerator::rand_float< / a > < / div > < div class = "ttdeci" > float rand_float()< / div > < div class = "ttdoc" > between 0 and 1 < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00207" > utils.cpp:207< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a40328c31abd0bbba5bd95d7de951e847" > < div class = "ttname" > < a href = "namespacefaiss.html#a40328c31abd0bbba5bd95d7de951e847" > faiss::fvec_madd< / a > < / div > < div class = "ttdeci" > void fvec_madd(size_t n, const float *a, float bf, const float *b, float *c)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01855" > utils.cpp:1855< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "namespacefaiss_html_aa3af5769b0b649f112332a874c64d361" > < div class = "ttname" > < a href = "namespacefaiss.html#aa3af5769b0b649f112332a874c64d361" > faiss::get_mem_usage_kb< / a > < / div > < div class = "ttdeci" > size_t get_mem_usage_kb()< / div > < div class = "ttdoc" > get current RSS usage in kB < / div > < / div >
2017-06-21 21:54:28 +08:00
< div class = "ttc" id = "namespacefaiss_html_a7bea462108bee98d8d5859b51ec4db8e" > < div class = "ttname" > < a href = "namespacefaiss.html#a7bea462108bee98d8d5859b51ec4db8e" > faiss::ivec_hist< / a > < / div > < div class = "ttdeci" > int ivec_hist(size_t n, const int *v, int vmax, int *hist)< / div > < div class = "ttdoc" > compute histogram on v < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01604" > utils.cpp:1604< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1RandomGenerator_html_acbceaa8b017793ca4f8d90e644b0d7f4" > < div class = "ttname" > < a href = "structfaiss_1_1RandomGenerator.html#acbceaa8b017793ca4f8d90e644b0d7f4" > faiss::RandomGenerator::rand_long< / a > < / div > < div class = "ttdeci" > long rand_long()< / div > < div class = "ttdoc" > random long & lt; 2 ^ 62 < / div > < / div >
2017-06-21 21:54:28 +08:00
< div class = "ttc" id = "namespacefaiss_html_afb7b33f6892678ba79aaf5e71777837c" > < div class = "ttname" > < a href = "namespacefaiss.html#afb7b33f6892678ba79aaf5e71777837c" > faiss::merge_result_table_with< / a > < / div > < div class = "ttdeci" > size_t merge_result_table_with(size_t n, size_t k, long *I0, float *D0, const long *I1, const float *D1, bool keep_min, long translation)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01477" > utils.cpp:1477< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1RandomGenerator_html_a583f124ecacdbe037ac96e23a44dd420" > < div class = "ttname" > < a href = "structfaiss_1_1RandomGenerator.html#a583f124ecacdbe037ac96e23a44dd420" > faiss::RandomGenerator::rand_int< / a > < / div > < div class = "ttdeci" > int rand_int()< / div > < div class = "ttdoc" > random 31-bit positive integer < / div > < / div >
2017-06-21 21:54:28 +08:00
< div class = "ttc" id = "structfaiss_1_1HeapArray_html" > < div class = "ttname" > < a href = "structfaiss_1_1HeapArray.html" > faiss::HeapArray< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Heap_8h_source.html#l00350" > Heap.h:350< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a8dbc652ba48d41f126b8815004899448" > < div class = "ttname" > < a href = "namespacefaiss.html#a8dbc652ba48d41f126b8815004899448" > faiss::ranklist_intersection_size< / a > < / div > < div class = "ttdeci" > size_t ranklist_intersection_size(size_t k1, const long *v1, size_t k2, const long *v2_in)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01542" > utils.cpp:1542< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a3d9c7db82d43c1f0ab1d28b92bc9fe57" > < div class = "ttname" > < a href = "namespacefaiss.html#a3d9c7db82d43c1f0ab1d28b92bc9fe57" > faiss::pairwise_L2sqr< / a > < / div > < div class = "ttdeci" > void pairwise_L2sqr(long d, long nq, const float *xq, long nb, const float *xb, float *dis, long ldq, long ldb, long ldd)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01311" > utils.cpp:1311< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_ab29d725b808df6f142b80f21aa45e507" > < div class = "ttname" > < a href = "namespacefaiss.html#ab29d725b808df6f142b80f21aa45e507" > faiss::range_search_inner_product< / a > < / div > < div class = "ttdeci" > void range_search_inner_product(const float *x, const float *y, size_t d, size_t nx, size_t ny, float radius, RangeSearchResult *res)< / div > < div class = "ttdoc" > same as range_search_L2sqr for the inner product similarity < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01249" > utils.cpp:1249< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a880c7318971f866267a86945aaa61b17" > < div class = "ttname" > < a href = "namespacefaiss.html#a880c7318971f866267a86945aaa61b17" > faiss::knn_inner_product< / a > < / div > < div class = "ttdeci" > void knn_inner_product(const float *x, const float *y, size_t d, size_t nx, size_t ny, float_minheap_array_t *res)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00915" > utils.cpp:915< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_af2a71f7d5402ae02ce169a4cc83020eb" > < div class = "ttname" > < a href = "namespacefaiss.html#af2a71f7d5402ae02ce169a4cc83020eb" > faiss::getmillisecs< / a > < / div > < div class = "ttdeci" > double getmillisecs()< / div > < div class = "ttdoc" > ms elapsed since some arbitrary epoch < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00070" > utils.cpp:70< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1NopDistanceCorrection_html" > < div class = "ttname" > < a href = "structfaiss_1_1NopDistanceCorrection.html" > faiss::NopDistanceCorrection< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00929" > utils.cpp:929< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a94c1d99ac39d22e362aa27ce7c7ff714" > < div class = "ttname" > < a href = "namespacefaiss.html#a94c1d99ac39d22e362aa27ce7c7ff714" > faiss::imbalance_factor< / a > < / div > < div class = "ttdeci" > double imbalance_factor(int k, const int *hist)< / div > < div class = "ttdoc" > same, takes a histogram as input < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01580" > utils.cpp:1580< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a7a49180ebf10e643217bbce5862c7f84" > < div class = "ttname" > < a href = "namespacefaiss.html#a7a49180ebf10e643217bbce5862c7f84" > faiss::fvec_norm_L2sqr< / a > < / div > < div class = "ttdeci" > float fvec_norm_L2sqr(const float *x, size_t d)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00538" > utils.cpp:538< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a1faa7bd079c9b1addf3058ddf882a000" > < div class = "ttname" > < a href = "namespacefaiss.html#a1faa7bd079c9b1addf3058ddf882a000" > faiss::range_search_L2sqr< / a > < / div > < div class = "ttdeci" > void range_search_L2sqr(const float *x, const float *y, size_t d, size_t nx, size_t ny, float radius, RangeSearchResult *res)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01234" > utils.cpp:1234< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_afb68fe89ad5e948974da1b70d7b4157c" > < div class = "ttname" > < a href = "namespacefaiss.html#afb68fe89ad5e948974da1b70d7b4157c" > faiss::matrix_qr< / a > < / div > < div class = "ttdeci" > void matrix_qr(int m, int n, float *a)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01289" > utils.cpp:1289< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1RangeSearchResult_html" > < div class = "ttname" > < a href = "structfaiss_1_1RangeSearchResult.html" > faiss::RangeSearchResult< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "AuxIndexStructures_8h_source.html#l00034" > AuxIndexStructures.h:34< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a4369329c9dbdfe23e3f35d09ba7b5c6e" > < div class = "ttname" > < a href = "namespacefaiss.html#a4369329c9dbdfe23e3f35d09ba7b5c6e" > faiss::ivec_checksum< / a > < / div > < div class = "ttdeci" > size_t ivec_checksum(size_t n, const int *a)< / div > < div class = "ttdoc" > compute a checksum on a table. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01638" > utils.cpp:1638< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1BaseShiftDistanceCorrection_html" > < div class = "ttname" > < a href = "structfaiss_1_1BaseShiftDistanceCorrection.html" > faiss::BaseShiftDistanceCorrection< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00948" > utils.cpp:948< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a9da63b8bb84460f5e8ccf8e17622cc7a" > < div class = "ttname" > < a href = "namespacefaiss.html#a9da63b8bb84460f5e8ccf8e17622cc7a" > faiss::fvec_madd_and_argmin< / a > < / div > < div class = "ttdeci" > int fvec_madd_and_argmin(size_t n, const float *a, float bf, const float *b, float *c)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l01929" > utils.cpp:1929< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a2f803e3d3b07cfab63699c89de161237" > < div class = "ttname" > < a href = "namespacefaiss.html#a2f803e3d3b07cfab63699c89de161237" > faiss::knn_L2sqr< / a > < / div > < div class = "ttdeci" > void knn_L2sqr(const float *x, const float *y, size_t d, size_t nx, size_t ny, float_maxheap_array_t *res)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "utils_8cpp_source.html#l00935" > utils.cpp:935< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
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