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< title > Faiss: hamming.cpp Source File< / title >
2017-02-23 06:26:44 +08:00
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2017-03-01 17:50:47 +08:00
< div class = "title" > hamming.cpp< / div > < / div >
2017-02-23 06:26:44 +08:00
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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" > /**< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > * Copyright (c) 2015-present, Facebook, Inc.< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > * All rights reserved.< / span > < / div >
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< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / 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 = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "comment" > * LICENSE file in the root directory of this source tree.< / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "comment" > /* Copyright 2004-present Facebook. All Rights Reserved.< / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "comment" > * Implementation of Hamming related functions (distances, smallest distance< / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "comment" > * selection with regular heap|radix and probabilistic heap|radix.< / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "comment" > * IMPLEMENTATION NOTES< / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "comment" > * Bitvectors are generally assumed to be multiples of 64 bits.< / span > < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "comment" > * hamdis_t is used for distances because at this time< / span > < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "comment" > * it is not clear how we will need to balance< / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "comment" > * - flexibility in vector size (unclear more than 2^16 or even 2^8 bitvectors)< / span > < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "comment" > * - memory usage< / span > < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "comment" > * - cache-misses when dealing with large volumes of data (lower bits is better)< / span > < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "comment" > * The hamdis_t should optimally be compatibe with one of the Torch Storage< / span > < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < span class = "comment" > * (Byte,Short,Long) and therefore should be signed for 2-bytes and 4-bytes< / span > < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "preprocessor" > #include " hamming.h" < / span > < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "preprocessor" > #include < stdlib.h> < / span > < / div >
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< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < span class = "preprocessor" > #include < limits.h> < / span > < / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "preprocessor" > #include " Heap.h" < / span > < / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < span class = "preprocessor" > #include " FaissAssert.h" < / span > < / div >
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< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > BLOCKSIZE_QUERY = 8192;< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < / div >
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< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "keyword" > static< / span > < span class = "keyword" > const< / span > uint8_t hamdis_tab_ham_bytes[256] = {< / div >
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< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8< / div >
< 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 >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < span class = "comment" > /* Elementary Hamming distance computation: unoptimized */< / span > < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > size_t< / span > nbits, < span class = "keyword" > typename< / span > T> < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   T hamming (< span class = "keyword" > const< / span > uint8_t *bs1,< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < span class = "keyword" > const< / span > uint8_t *bs2)< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   {< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nbytes = nbits / 8;< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   < span class = "keywordtype" > size_t< / span > i;< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   T h = 0;< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < nbytes; i++)< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   h += (T) hamdis_tab_ham_bytes[bs1[i]^bs2[i]];< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "keywordflow" > return< / span > h;< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   }< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "comment" > /* Hamming distances for multiples of 64 bits */< / span > < / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > size_t< / span > nbits> < / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   hamdis_t hamming (< span class = "keyword" > const< / span > uint64_t * bs1, < span class = "keyword" > const< / span > uint64_t * bs2)< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   {< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nwords = nbits / 64;< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "keywordtype" > size_t< / span > i;< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   hamdis_t h = 0;< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < nwords; i++)< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   h += popcount64 (bs1[i] ^ bs2[i]);< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordflow" > return< / span > h;< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   }< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / 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 >   < span class = "comment" > /* specialized (optimized) functions */< / span > < / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "keyword" > template< / span > < > < / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   hamdis_t hamming< 64> (< span class = "keyword" > const< / span > uint64_t * pa, < span class = "keyword" > const< / span > uint64_t * pb)< / 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 = "keywordflow" > return< / span > popcount64 (pa[0] ^ pb[0]);< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   }< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < / 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 >   < span class = "keyword" > template< / span > < > < / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   hamdis_t hamming< 128> (< span class = "keyword" > const< / span > uint64_t *pa, < span class = "keyword" > const< / span > uint64_t *pb)< / 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 >   < span class = "keywordflow" > return< / span > popcount64 (pa[0] ^ pb[0]) + popcount64(pa[1] ^ pb[1]);< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   }< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   < span class = "keyword" > template< / span > < > < / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   hamdis_t hamming< 256> (< span class = "keyword" > const< / span > uint64_t * pa, < span class = "keyword" > const< / span > uint64_t * pb)< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   {< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "keywordflow" > return< / span > popcount64 (pa[0] ^ pb[0])< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   + popcount64 (pa[1] ^ pb[1])< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   + popcount64 (pa[2] ^ pb[2])< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   + popcount64 (pa[3] ^ pb[3]);< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   }< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   < / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < span class = "comment" > /* Hamming distances for multiple of 64 bits */< / span > < / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   hamdis_t hamming (< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < span class = "keyword" > const< / span > uint64_t * bs1,< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < span class = "keyword" > const< / span > uint64_t * bs2,< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "keywordtype" > size_t< / span > nwords)< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   {< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   < span class = "keywordtype" > size_t< / span > i;< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   hamdis_t h = 0;< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < nwords; i++)< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   h += popcount64 (bs1[i] ^ bs2[i]);< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "keywordflow" > return< / span > h;< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   }< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   < / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > size_t< / span > nbits> < / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < span class = "keywordtype" > void< / span > hammings (< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < span class = "keyword" > const< / span > uint64_t * bs1,< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < span class = "keyword" > const< / span > uint64_t * bs2,< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   < span class = "keywordtype" > size_t< / span > n1, < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   hamdis_t * dis)< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   < / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   {< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   < span class = "keywordtype" > size_t< / span > i, j;< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nwords = nbits / 64;< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < n1; i++) {< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   < span class = "keyword" > const< / span > uint64_t * __restrict bs1_ = bs1 + i * nwords;< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   hamdis_t * __restrict dis_ = dis + i * n2;< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < n2; j++)< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   dis_[j] = hamming< nbits> (bs1_, bs2 + j * nwords);< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   }< / 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 >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   < / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   < span class = "keywordtype" > void< / span > hammings (< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   < span class = "keyword" > const< / span > uint64_t * bs1,< / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   < span class = "keyword" > const< / span > uint64_t * bs2,< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   < span class = "keywordtype" > size_t< / span > n1,< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   < span class = "keywordtype" > size_t< / span > nwords,< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   hamdis_t * __restrict dis)< / 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 >   < span class = "keywordtype" > size_t< / span > i, j;< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   n1 *= nwords;< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   n2 *= nwords;< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < n1; i+=nwords) {< / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   < span class = "keyword" > const< / span > uint64_t * bs1_ = bs1+i;< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < n2; j+=nwords)< / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   dis[j] = hamming (bs1_, bs2+j, nwords);< / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   }< / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   }< / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < / 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 >   < / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   < span class = "comment" > /* Count number of matches given a max threshold */< / span > < / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > size_t< / span > nbits> < / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   < span class = "keywordtype" > void< / span > hamming_count_thres (< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < span class = "keyword" > const< / span > uint64_t * bs1,< / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < span class = "keyword" > const< / span > uint64_t * bs2,< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   < span class = "keywordtype" > size_t< / span > n1,< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   hamdis_t ht,< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   < span class = "keywordtype" > size_t< / span > * nptr)< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   {< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nwords = nbits / 64;< / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   < span class = "keywordtype" > size_t< / span > i, j, posm = 0;< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   < span class = "keyword" > const< / span > uint64_t * bs2_ = bs2;< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   < / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < n1; i++) {< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   bs2 = bs2_;< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < n2; j++) {< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   < span class = "comment" > /* collect the match only if this satisfies the threshold */< / span > < / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   < span class = "keywordflow" > if< / span > (hamming < nbits> (bs1, bs2) < = ht)< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   posm++;< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   bs2 += nwords;< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   }< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   bs1 += nwords; < span class = "comment" > /* next signature */< / span > < / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   }< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   *nptr = posm;< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   }< / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   < / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > size_t< / span > nbits> < / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   < span class = "keywordtype" > void< / span > crosshamming_count_thres (< / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < span class = "keyword" > const< / span > uint64_t * dbs,< / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   < span class = "keywordtype" > size_t< / span > n,< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   < span class = "keywordtype" > int< / span > ht,< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   < span class = "keywordtype" > size_t< / span > * nptr)< / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   {< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nwords = nbits / 64;< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   < span class = "keywordtype" > size_t< / span > i, j, posm = 0;< / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   < span class = "keyword" > const< / span > uint64_t * bs1 = dbs;< / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < n; i++) {< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < span class = "keyword" > const< / span > uint64_t * bs2 = bs1 + 2;< / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   < span class = "keywordflow" > for< / span > (j = i + 1; j < n; j++) {< / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   < span class = "comment" > /* collect the match only if this satisfies the threshold */< / span > < / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   < span class = "keywordflow" > if< / span > (hamming < nbits> (bs1, bs2) < = ht)< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   posm++;< / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   bs2 += nwords;< / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   }< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   bs1 += nwords;< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   }< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   *nptr = posm;< / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   }< / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   < / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   < span class = "keyword" > template< / span > < < span class = "keywordtype" > size_t< / span > nbits> < / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < span class = "keywordtype" > size_t< / span > match_hamming_thres (< / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   < span class = "keyword" > const< / span > uint64_t * bs1,< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   < span class = "keyword" > const< / span > uint64_t * bs2,< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   < span class = "keywordtype" > size_t< / span > n1,< / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   < span class = "keywordtype" > int< / span > ht,< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   < span class = "keywordtype" > long< / span > * idx,< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   hamdis_t * hams)< / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   {< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nwords = nbits / 64;< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   < span class = "keywordtype" > size_t< / span > i, j, posm = 0;< / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   hamdis_t h;< / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   < span class = "keyword" > const< / span > uint64_t * bs2_ = bs2;< / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < n1; i++) {< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   bs2 = bs2_;< / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < n2; j++) {< / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   < span class = "comment" > /* Here perform the real work of computing the distance */< / span > < / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   h = hamming < nbits> (bs1, bs2);< / 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 >   < span class = "comment" > /* collect the match only if this satisfies the threshold */< / span > < / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   < span class = "keywordflow" > if< / span > (h < = ht) {< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   < span class = "comment" > /* Enough space to store another match ? */< / span > < / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   *idx = i; idx++;< / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   *idx = j; idx++;< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   *hams = h;< / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   hams++;< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   posm++;< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   }< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   bs2+=nwords; < span class = "comment" > /* next signature */< / span > < / 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 >   bs1+=nwords;< / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   }< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   < span class = "keywordflow" > return< / span > posm;< / 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 >   < / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   < / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   < span class = "comment" > /* Return closest neighbors w.r.t Hamming distance */< / span > < / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   < span class = "keyword" > template< / span > < < span class = "keyword" > class< / span > HammingComputer> < / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   < span class = "keyword" > static< / span > < / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   < span class = "keywordtype" > void< / span > hammings_knn_hc (< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   < span class = "keywordtype" > int< / span > bytes_per_code,< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   int_maxheap_array_t * ha,< / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   < span class = "keyword" > const< / span > uint8_t * bs1,< / div >
< div class = "line" > < a name = "l00269" > < / a > < span class = "lineno" > 269< / span >   < span class = "keyword" > const< / span > uint8_t * bs2,< / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   < span class = "keywordtype" > bool< / span > order = < span class = "keyword" > true< / span > ,< / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   < span class = "keywordtype" > bool< / span > init_heap = < span class = "keyword" > true< / span > )< / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   {< / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   < span class = "keywordtype" > size_t< / span > k = ha-> k;< / 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 >   < / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   < span class = "keywordflow" > if< / span > (init_heap) ha-> heapify ();< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   < span class = "comment" > /* The computation here does not involved any blockization, which< / span > < / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   < span class = "comment" > is suboptimal for many queries in parallel. */< / span > < / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < ha-> nh; i++) {< / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   HammingComputer hc (bs1 + i * bytes_per_code, bytes_per_code);< / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   < / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   < span class = "keyword" > const< / span > uint8_t * bs2_ = bs2;< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   hamdis_t dis;< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   hamdis_t * __restrict bh_val_ = ha-> val + i * k;< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   < span class = "keywordtype" > long< / span > * __restrict bh_ids_ = ha-> ids + i * k;< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   < span class = "keywordtype" > size_t< / span > j;< / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < n2; j++, bs2_+= bytes_per_code) {< / div >
< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   dis = hc.hamming (bs2_);< / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   < span class = "keywordflow" > if< / span > (dis < bh_val_[0]) {< / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   faiss::maxheap_pop< hamdis_t> (k, bh_val_, bh_ids_);< / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   faiss::maxheap_push< hamdis_t> (k, bh_val_, bh_ids_, dis, 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 >   }< / 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 = "keywordflow" > if< / span > (order) ha-> reorder ();< / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   }< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   < / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   < / 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 >   < span class = "comment" > // works faster than the template version< / span > < / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   < span class = "keyword" > static< / span > < / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < span class = "keywordtype" > void< / span > hammings_knn_1 (< / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   int_maxheap_array_t * ha,< / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   < span class = "keyword" > const< / span > uint64_t * bs1,< / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   < span class = "keyword" > const< / span > uint64_t * bs2,< / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   < span class = "keywordtype" > bool< / span > order = < span class = "keyword" > true< / span > ,< / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   < span class = "keywordtype" > bool< / span > init_heap = < span class = "keyword" > true< / span > )< / 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 = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nwords = 1;< / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   < span class = "keywordtype" > size_t< / span > k = ha-> k;< / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   < / 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 >   < span class = "keywordflow" > if< / span > (init_heap) {< / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   ha-> heapify ();< / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   }< / div >
< 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 >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00322" > < / a > < span class = "lineno" > 322< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < ha-> nh; i++) {< / div >
< div class = "line" > < a name = "l00323" > < / a > < span class = "lineno" > 323< / span >   < span class = "keyword" > const< / span > uint64_t bs1_ = bs1 [i];< / div >
< div class = "line" > < a name = "l00324" > < / a > < span class = "lineno" > 324< / span >   < span class = "keyword" > const< / span > uint64_t * bs2_ = bs2;< / div >
< div class = "line" > < a name = "l00325" > < / a > < span class = "lineno" > 325< / span >   hamdis_t dis;< / div >
< div class = "line" > < a name = "l00326" > < / a > < span class = "lineno" > 326< / span >   hamdis_t * bh_val_ = ha-> val + i * k;< / div >
< div class = "line" > < a name = "l00327" > < / a > < span class = "lineno" > 327< / span >   hamdis_t bh_val_0 = bh_val_[0];< / div >
< div class = "line" > < a name = "l00328" > < / a > < span class = "lineno" > 328< / span >   < span class = "keywordtype" > long< / span > * bh_ids_ = ha-> ids + i * k;< / div >
< div class = "line" > < a name = "l00329" > < / a > < span class = "lineno" > 329< / span >   < span class = "keywordtype" > size_t< / span > j;< / div >
< div class = "line" > < a name = "l00330" > < / a > < span class = "lineno" > 330< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < n2; j++, bs2_+= nwords) {< / div >
< div class = "line" > < a name = "l00331" > < / a > < span class = "lineno" > 331< / span >   dis = popcount64 (bs1_ ^ *bs2_);< / div >
< div class = "line" > < a name = "l00332" > < / a > < span class = "lineno" > 332< / span >   < span class = "keywordflow" > if< / span > (dis < bh_val_0) {< / div >
< div class = "line" > < a name = "l00333" > < / a > < span class = "lineno" > 333< / span >   faiss::maxheap_pop< hamdis_t> (k, bh_val_, bh_ids_);< / div >
< div class = "line" > < a name = "l00334" > < / a > < span class = "lineno" > 334< / span >   faiss::maxheap_push< hamdis_t> (k, bh_val_, bh_ids_, dis, j);< / div >
< div class = "line" > < a name = "l00335" > < / a > < span class = "lineno" > 335< / span >   bh_val_0 = bh_val_[0];< / div >
< div class = "line" > < a name = "l00336" > < / a > < span class = "lineno" > 336< / span >   }< / 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 >   }< / div >
< div class = "line" > < a name = "l00339" > < / a > < span class = "lineno" > 339< / span >   < span class = "keywordflow" > if< / span > (order) {< / div >
< div class = "line" > < a name = "l00340" > < / a > < span class = "lineno" > 340< / span >   ha-> reorder ();< / 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 >
< div class = "line" > < a name = "l00344" > < / a > < span class = "lineno" > 344< / span >   < / div >
< div class = "line" > < a name = "l00345" > < / a > < span class = "lineno" > 345< / span >   < / div >
< div class = "line" > < a name = "l00346" > < / a > < span class = "lineno" > 346< / span >   < / div >
< div class = "line" > < a name = "l00347" > < / a > < span class = "lineno" > 347< / span >   < span class = "comment" > /* Functions to maps vectors to bits. Assume proper allocation done beforehand,< / span > < / div >
< div class = "line" > < a name = "l00348" > < / a > < span class = "lineno" > 348< / span >   < span class = "comment" > meaning that b should be be able to receive as many bits as x may produce. */< / span > < / 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 = "comment" > /*< / span > < / div >
< div class = "line" > < a name = "l00351" > < / a > < span class = "lineno" > 351< / span >   < span class = "comment" > * dimension 0 corresponds to the least significant bit of b[0], or< / span > < / div >
< div class = "line" > < a name = "l00352" > < / a > < span class = "lineno" > 352< / span >   < span class = "comment" > * equivalently to the lsb of the first byte that is stored.< / span > < / div >
< div class = "line" > < a name = "l00353" > < / a > < span class = "lineno" > 353< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00354" > < / a > < span class = "lineno" > 354< / span >   < span class = "keywordtype" > void< / span > fvec2bitvec (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x, uint8_t * b, < span class = "keywordtype" > size_t< / span > d)< / 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 > (< span class = "keywordtype" > int< / span > i = 0; i < d; i += 8) {< / div >
< div class = "line" > < a name = "l00357" > < / a > < span class = "lineno" > 357< / span >   uint8_t w = 0;< / div >
< div class = "line" > < a name = "l00358" > < / a > < span class = "lineno" > 358< / span >   uint8_t mask = 1;< / div >
< div class = "line" > < a name = "l00359" > < / a > < span class = "lineno" > 359< / span >   < span class = "keywordtype" > int< / span > nj = i + 8 < = d ? 8 : d - i;< / div >
< div class = "line" > < a name = "l00360" > < / a > < span class = "lineno" > 360< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 0; j < nj; j++) {< / div >
< div class = "line" > < a name = "l00361" > < / a > < span class = "lineno" > 361< / span >   < span class = "keywordflow" > if< / span > (x[i + j] > = 0)< / div >
< div class = "line" > < a name = "l00362" > < / a > < span class = "lineno" > 362< / span >   w |= mask;< / div >
< div class = "line" > < a name = "l00363" > < / a > < span class = "lineno" > 363< / span >   mask < < = 1;< / div >
< div class = "line" > < a name = "l00364" > < / a > < span class = "lineno" > 364< / span >   }< / div >
< div class = "line" > < a name = "l00365" > < / a > < span class = "lineno" > 365< / span >   *b = w;< / div >
< div class = "line" > < a name = "l00366" > < / a > < span class = "lineno" > 366< / span >   b++;< / 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 >
< div class = "line" > < a name = "l00370" > < / a > < span class = "lineno" > 370< / span >   < / div >
< div class = "line" > < a name = "l00371" > < / a > < span class = "lineno" > 371< / span >   < / div >
< div class = "line" > < a name = "l00372" > < / a > < span class = "lineno" > 372< / span >   < span class = "comment" > /* Same but for n vectors.< / span > < / div >
< div class = "line" > < a name = "l00373" > < / a > < span class = "lineno" > 373< / span >   < span class = "comment" > Ensure that the ouptut b is byte-aligned (pad with 0s). */< / span > < / div >
< div class = "line" > < a name = "l00374" > < / a > < span class = "lineno" > 374< / span >   < span class = "keywordtype" > void< / span > fvecs2bitvecs (< span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x, uint8_t * b, < span class = "keywordtype" > size_t< / span > d, < span class = "keywordtype" > size_t< / span > n)< / div >
< div class = "line" > < a name = "l00375" > < / a > < span class = "lineno" > 375< / span >   {< / div >
< div class = "line" > < a name = "l00376" > < / a > < span class = "lineno" > 376< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > long< / span > ncodes = ((d + 7) / 8);< / div >
< div class = "line" > < a name = "l00377" > < / a > < span class = "lineno" > 377< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00378" > < / a > < span class = "lineno" > 378< / 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 = "l00379" > < / a > < span class = "lineno" > 379< / span >   fvec2bitvec (x + i * d, b + i * ncodes, d);< / div >
< div class = "line" > < a name = "l00380" > < / a > < span class = "lineno" > 380< / span >   }< / div >
< div class = "line" > < a name = "l00381" > < / a > < span class = "lineno" > 381< / span >   < / div >
< div class = "line" > < a name = "l00382" > < / a > < span class = "lineno" > 382< / span >   < / div >
< div class = "line" > < a name = "l00383" > < / a > < span class = "lineno" > 383< / span >   < span class = "comment" > /* Reverse bit (NOT a optimized function, only used for print purpose) */< / span > < / div >
< div class = "line" > < a name = "l00384" > < / a > < span class = "lineno" > 384< / span >   < span class = "keyword" > static< / span > uint64_t uint64_reverse_bits (uint64_t b)< / div >
< div class = "line" > < a name = "l00385" > < / a > < span class = "lineno" > 385< / span >   {< / div >
< div class = "line" > < a name = "l00386" > < / a > < span class = "lineno" > 386< / span >   < span class = "keywordtype" > int< / span > i;< / div >
< div class = "line" > < a name = "l00387" > < / a > < span class = "lineno" > 387< / span >   uint64_t revb = 0;< / div >
< div class = "line" > < a name = "l00388" > < / a > < span class = "lineno" > 388< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < 64; i++) {< / div >
< div class = "line" > < a name = "l00389" > < / a > < span class = "lineno" > 389< / span >   revb < < = 1;< / div >
< div class = "line" > < a name = "l00390" > < / a > < span class = "lineno" > 390< / span >   revb |= b & 1;< / div >
< div class = "line" > < a name = "l00391" > < / a > < span class = "lineno" > 391< / span >   b > > = 1;< / 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 = "keywordflow" > return< / span > revb;< / div >
< div class = "line" > < a name = "l00394" > < / a > < span class = "lineno" > 394< / span >   }< / div >
< div class = "line" > < a name = "l00395" > < / a > < span class = "lineno" > 395< / span >   < / div >
< div class = "line" > < a name = "l00396" > < / a > < span class = "lineno" > 396< / span >   < / div >
< div class = "line" > < a name = "l00397" > < / a > < span class = "lineno" > 397< / span >   < span class = "comment" > /* print the bit vector */< / span > < / div >
< div class = "line" > < a name = "l00398" > < / a > < span class = "lineno" > 398< / span >   < span class = "keywordtype" > void< / span > bitvec_print (< span class = "keyword" > const< / span > uint8_t * b, < span class = "keywordtype" > size_t< / span > d)< / div >
< div class = "line" > < a name = "l00399" > < / a > < span class = "lineno" > 399< / span >   {< / div >
< div class = "line" > < a name = "l00400" > < / a > < span class = "lineno" > 400< / span >   < span class = "keywordtype" > size_t< / span > i, j;< / div >
< div class = "line" > < a name = "l00401" > < / a > < span class = "lineno" > 401< / span >   < span class = "keywordflow" > for< / span > (i = 0; i < d; ) {< / div >
< div class = "line" > < a name = "l00402" > < / a > < span class = "lineno" > 402< / span >   uint64_t brev = uint64_reverse_bits (* (uint64_t *) b);< / div >
< div class = "line" > < a name = "l00403" > < / a > < span class = "lineno" > 403< / span >   < span class = "keywordflow" > for< / span > (j = 0; j < 64 & & i < d; j++, i++) {< / div >
< div class = "line" > < a name = "l00404" > < / a > < span class = "lineno" > 404< / span >   printf (< span class = "stringliteral" > " %d" < / span > , (< span class = "keywordtype" > int< / span > ) (brev & 1));< / div >
< div class = "line" > < a name = "l00405" > < / a > < span class = "lineno" > 405< / span >   brev > > = 1;< / div >
< div class = "line" > < a name = "l00406" > < / a > < span class = "lineno" > 406< / span >   }< / div >
< div class = "line" > < a name = "l00407" > < / a > < span class = "lineno" > 407< / span >   b += 8;< / div >
< div class = "line" > < a name = "l00408" > < / a > < span class = "lineno" > 408< / span >   printf (< span class = "stringliteral" > " " < / span > );< / div >
< div class = "line" > < a name = "l00409" > < / a > < span class = "lineno" > 409< / span >   }< / div >
< div class = "line" > < a name = "l00410" > < / a > < span class = "lineno" > 410< / span >   }< / div >
< div class = "line" > < a name = "l00411" > < / a > < span class = "lineno" > 411< / span >   < / div >
< div class = "line" > < a name = "l00412" > < / a > < span class = "lineno" > 412< / span >   < / div >
< div class = "line" > < a name = "l00413" > < / a > < span class = "lineno" > 413< / span >   < / div >
< div class = "line" > < a name = "l00414" > < / a > < span class = "lineno" > 414< / span >   < / div >
< div class = "line" > < a name = "l00415" > < / a > < span class = "lineno" > 415< / span >   < / div >
< div class = "line" > < a name = "l00416" > < / a > < span class = "lineno" > 416< / span >   < span class = "comment" > /*----------------------------------------*/< / span > < / div >
< div class = "line" > < a name = "l00417" > < / a > < span class = "lineno" > 417< / span >   < span class = "comment" > /* Hamming distance computation and k-nn */< / 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 >   < span class = "preprocessor" > #define C64(x) ((uint64_t *)x)< / span > < / div >
< div class = "line" > < a name = "l00421" > < / a > < span class = "lineno" > 421< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00422" > < / a > < span class = "lineno" > 422< / span >   < / div >
< div class = "line" > < a name = "l00423" > < / a > < span class = "lineno" > 423< / span >   < span class = "comment" > /* Compute a set of Hamming distances */< / span > < / div >
< div class = "line" > < a name = "l00424" > < / a > < span class = "lineno" > 424< / span >   < span class = "keywordtype" > void< / span > hammings (< / div >
< div class = "line" > < a name = "l00425" > < / a > < span class = "lineno" > 425< / span >   < span class = "keyword" > const< / span > uint8_t * a,< / div >
< div class = "line" > < a name = "l00426" > < / a > < span class = "lineno" > 426< / span >   < span class = "keyword" > const< / span > uint8_t * b,< / div >
< div class = "line" > < a name = "l00427" > < / a > < span class = "lineno" > 427< / span >   < span class = "keywordtype" > size_t< / span > na, < span class = "keywordtype" > size_t< / span > nb,< / div >
< div class = "line" > < a name = "l00428" > < / a > < span class = "lineno" > 428< / span >   < span class = "keywordtype" > size_t< / span > ncodes,< / div >
< div class = "line" > < a name = "l00429" > < / a > < span class = "lineno" > 429< / span >   hamdis_t * __restrict dis)< / div >
< div class = "line" > < a name = "l00430" > < / a > < span class = "lineno" > 430< / span >   {< / div >
< div class = "line" > < a name = "l00431" > < / a > < span class = "lineno" > 431< / span >   FAISS_ASSERT (ncodes % 8 == 0);< / div >
< div class = "line" > < a name = "l00432" > < / a > < span class = "lineno" > 432< / span >   < span class = "keywordflow" > switch< / span > (ncodes) {< / div >
< div class = "line" > < a name = "l00433" > < / a > < span class = "lineno" > 433< / span >   < span class = "keywordflow" > case< / span > 8:< / div >
< div class = "line" > < a name = "l00434" > < / a > < span class = "lineno" > 434< / span >   faiss::hammings < 64> (C64(a), C64(b), na, nb, dis); < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00435" > < / a > < span class = "lineno" > 435< / span >   < span class = "keywordflow" > case< / span > 16:< / div >
< div class = "line" > < a name = "l00436" > < / a > < span class = "lineno" > 436< / span >   faiss::hammings < 128> (C64(a), C64(b), na, nb, dis); < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00437" > < / a > < span class = "lineno" > 437< / span >   < span class = "keywordflow" > case< / span > 32:< / div >
< div class = "line" > < a name = "l00438" > < / a > < span class = "lineno" > 438< / span >   faiss::hammings < 256> (C64(a), C64(b), na, nb, dis); < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00439" > < / a > < span class = "lineno" > 439< / span >   < span class = "keywordflow" > case< / span > 64:< / div >
< div class = "line" > < a name = "l00440" > < / a > < span class = "lineno" > 440< / span >   faiss::hammings < 512> (C64(a), C64(b), na, nb, dis); < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00441" > < / a > < span class = "lineno" > 441< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00442" > < / a > < span class = "lineno" > 442< / span >   < a class = "code" href = "namespacefaiss.html#a0832c5ab58f4d1a340b0bde273c5b501" > faiss::hammings< / a > (C64(a), C64(b), na, nb, ncodes * 8, dis); < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00443" > < / a > < span class = "lineno" > 443< / span >   }< / 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 >   < / div >
< div class = "line" > < a name = "l00447" > < / a > < span class = "lineno" > 447< / span >   < span class = "keywordtype" > void< / span > hammings_knn_core (< / div >
< div class = "line" > < a name = "l00448" > < / a > < span class = "lineno" > 448< / span >   int_maxheap_array_t * ha,< / div >
< div class = "line" > < a name = "l00449" > < / a > < span class = "lineno" > 449< / span >   < span class = "keyword" > const< / span > uint8_t * a,< / div >
< div class = "line" > < a name = "l00450" > < / a > < span class = "lineno" > 450< / span >   < span class = "keyword" > const< / span > uint8_t * b,< / div >
< div class = "line" > < a name = "l00451" > < / a > < span class = "lineno" > 451< / span >   < span class = "keywordtype" > size_t< / span > nb,< / div >
< div class = "line" > < a name = "l00452" > < / a > < span class = "lineno" > 452< / span >   < span class = "keywordtype" > size_t< / span > ncodes)< / div >
< div class = "line" > < a name = "l00453" > < / a > < span class = "lineno" > 453< / span >   {< / div >
< div class = "line" > < a name = "l00454" > < / a > < span class = "lineno" > 454< / span >   FAISS_ASSERT (ncodes % 8 == 0);< / 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 >   < span class = "keywordflow" > switch< / span > (ncodes) {< / div >
< div class = "line" > < a name = "l00457" > < / a > < span class = "lineno" > 457< / span >   hammings_knn_1 (ha, C64(a), C64(b), nb, < span class = "keyword" > false< / span > , < span class = "keyword" > true< / span > );< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00458" > < / a > < span class = "lineno" > 458< / span >   < span class = "comment" > // hammings_knn_hc< faiss::HammingComputer8> < / span > < / div >
< div class = "line" > < a name = "l00459" > < / a > < span class = "lineno" > 459< / span >   < span class = "comment" > // (8, ha, a, b, nb, false, true);< / span > < / div >
< div class = "line" > < a name = "l00460" > < / a > < span class = "lineno" > 460< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00461" > < / a > < span class = "lineno" > 461< / span >   < span class = "keywordflow" > case< / span > 16:< / div >
< div class = "line" > < a name = "l00462" > < / a > < span class = "lineno" > 462< / span >   hammings_knn_hc< faiss::HammingComputer16> < / div >
< div class = "line" > < a name = "l00463" > < / a > < span class = "lineno" > 463< / span >   (16, ha, a, b, nb, < span class = "keyword" > false< / span > , < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00464" > < / a > < span class = "lineno" > 464< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00465" > < / a > < span class = "lineno" > 465< / span >   < span class = "keywordflow" > case< / span > 32:< / div >
< div class = "line" > < a name = "l00466" > < / a > < span class = "lineno" > 466< / span >   hammings_knn_hc< faiss::HammingComputer32> < / div >
< div class = "line" > < a name = "l00467" > < / a > < span class = "lineno" > 467< / span >   (32, ha, a, b, nb, < span class = "keyword" > false< / span > , < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00468" > < / a > < span class = "lineno" > 468< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00469" > < / a > < span class = "lineno" > 469< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00470" > < / a > < span class = "lineno" > 470< / span >   hammings_knn_hc< faiss::HammingComputerM8> < / div >
< div class = "line" > < a name = "l00471" > < / a > < span class = "lineno" > 471< / span >   (ncodes, ha, a, b, nb, < span class = "keyword" > false< / span > , < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00472" > < / a > < span class = "lineno" > 472< / span >   }< / 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 >   < / div >
< div class = "line" > < a name = "l00475" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#ac0b4dc73a8470d61f510396dc460ca18" > 475< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#ac0b4dc73a8470d61f510396dc460ca18" > hammings_knn< / a > (< / div >
< div class = "line" > < a name = "l00476" > < / a > < span class = "lineno" > 476< / span >   < a class = "code" href = "structfaiss_1_1HeapArray.html" > int_maxheap_array_t< / a > * ha,< / div >
< div class = "line" > < a name = "l00477" > < / a > < span class = "lineno" > 477< / span >   < span class = "keyword" > const< / span > uint8_t * a,< / div >
< div class = "line" > < a name = "l00478" > < / a > < span class = "lineno" > 478< / span >   < span class = "keyword" > const< / span > uint8_t * b,< / div >
< div class = "line" > < a name = "l00479" > < / a > < span class = "lineno" > 479< / span >   < span class = "keywordtype" > size_t< / span > nb,< / div >
< div class = "line" > < a name = "l00480" > < / a > < span class = "lineno" > 480< / span >   < span class = "keywordtype" > size_t< / span > ncodes,< / div >
< div class = "line" > < a name = "l00481" > < / a > < span class = "lineno" > 481< / span >   < span class = "keywordtype" > int< / span > order)< / div >
< div class = "line" > < a name = "l00482" > < / a > < span class = "lineno" > 482< / span >   {< / div >
< div class = "line" > < a name = "l00483" > < / a > < span class = "lineno" > 483< / span >   < span class = "keywordflow" > switch< / span > (ncodes) {< / div >
< div class = "line" > < a name = "l00484" > < / a > < span class = "lineno" > 484< / span >   < span class = "keywordflow" > case< / span > 4:< / div >
< div class = "line" > < a name = "l00485" > < / a > < span class = "lineno" > 485< / span >   hammings_knn_hc< faiss::HammingComputer4> < / div >
< div class = "line" > < a name = "l00486" > < / a > < span class = "lineno" > 486< / span >   (4, ha, a, b, nb, order, < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00487" > < / a > < span class = "lineno" > 487< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00488" > < / a > < span class = "lineno" > 488< / span >   < span class = "keywordflow" > case< / span > 8:< / div >
< div class = "line" > < a name = "l00489" > < / a > < span class = "lineno" > 489< / span >   hammings_knn_1 (ha, C64(a), C64(b), nb, order, < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00490" > < / a > < span class = "lineno" > 490< / span >   < span class = "comment" > // hammings_knn_hc< faiss::HammingComputer8> < / span > < / div >
< div class = "line" > < a name = "l00491" > < / a > < span class = "lineno" > 491< / span >   < span class = "comment" > // (8, ha, a, b, nb, order, true);< / span > < / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00492" > < / a > < span class = "lineno" > 492< / span >   < span class = "keywordflow" > break< / span > ;< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00493" > < / a > < span class = "lineno" > 493< / span >   < span class = "keywordflow" > case< / span > 16:< / div >
< div class = "line" > < a name = "l00494" > < / a > < span class = "lineno" > 494< / span >   hammings_knn_hc< faiss::HammingComputer16> < / div >
< div class = "line" > < a name = "l00495" > < / a > < span class = "lineno" > 495< / span >   (16, ha, a, b, nb, order, < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00496" > < / a > < span class = "lineno" > 496< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00497" > < / a > < span class = "lineno" > 497< / span >   < span class = "keywordflow" > case< / span > 32:< / div >
< div class = "line" > < a name = "l00498" > < / a > < span class = "lineno" > 498< / span >   hammings_knn_hc< faiss::HammingComputer32> < / div >
< div class = "line" > < a name = "l00499" > < / a > < span class = "lineno" > 499< / span >   (32, ha, a, b, nb, order, < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00500" > < / a > < span class = "lineno" > 500< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00501" > < / a > < span class = "lineno" > 501< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00502" > < / a > < span class = "lineno" > 502< / span >   FAISS_ASSERT (ncodes % 8 == 0);< / div >
< div class = "line" > < a name = "l00503" > < / a > < span class = "lineno" > 503< / span >   hammings_knn_hc< faiss::HammingComputerM8> < / div >
< div class = "line" > < a name = "l00504" > < / a > < span class = "lineno" > 504< / span >   (ncodes, ha, a, b, nb, order, < span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00505" > < / a > < span class = "lineno" > 505< / span >   < / 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 >   < / div >
< div class = "line" > < a name = "l00510" > < / a > < span class = "lineno" > 510< / span >   < / div >
< div class = "line" > < a name = "l00511" > < / a > < span class = "lineno" > 511< / span >   < / div >
< div class = "line" > < a name = "l00512" > < / a > < span class = "lineno" > 512< / span >   < span class = "comment" > /* Count number of matches given a max threshold */< / span > < / div >
< div class = "line" > < a name = "l00513" > < / a > < span class = "lineno" > 513< / span >   < span class = "keywordtype" > void< / span > hamming_count_thres (< / div >
< div class = "line" > < a name = "l00514" > < / a > < span class = "lineno" > 514< / span >   < span class = "keyword" > const< / span > uint8_t * bs1,< / div >
< div class = "line" > < a name = "l00515" > < / a > < span class = "lineno" > 515< / span >   < span class = "keyword" > const< / span > uint8_t * bs2,< / div >
< div class = "line" > < a name = "l00516" > < / a > < span class = "lineno" > 516< / span >   < span class = "keywordtype" > size_t< / span > n1,< / div >
< div class = "line" > < a name = "l00517" > < / a > < span class = "lineno" > 517< / span >   < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00518" > < / a > < span class = "lineno" > 518< / span >   hamdis_t ht,< / div >
< div class = "line" > < a name = "l00519" > < / a > < span class = "lineno" > 519< / span >   < span class = "keywordtype" > size_t< / span > ncodes,< / div >
< div class = "line" > < a name = "l00520" > < / a > < span class = "lineno" > 520< / span >   < span class = "keywordtype" > size_t< / span > * nptr)< / 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 >   < span class = "keywordflow" > switch< / span > (ncodes) {< / div >
< div class = "line" > < a name = "l00523" > < / a > < span class = "lineno" > 523< / span >   < span class = "keywordflow" > case< / span > 8:< / div >
< div class = "line" > < a name = "l00524" > < / a > < span class = "lineno" > 524< / span >   faiss::hamming_count_thres < 64> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00525" > < / a > < span class = "lineno" > 525< / span >   n1, n2, ht, nptr);< / div >
< div class = "line" > < a name = "l00526" > < / a > < span class = "lineno" > 526< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00527" > < / a > < span class = "lineno" > 527< / span >   < span class = "keywordflow" > case< / span > 16:< / div >
< div class = "line" > < a name = "l00528" > < / a > < span class = "lineno" > 528< / span >   faiss::hamming_count_thres < 128> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00529" > < / a > < span class = "lineno" > 529< / span >   n1, n2, ht, nptr);< / div >
< div class = "line" > < a name = "l00530" > < / a > < span class = "lineno" > 530< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00531" > < / a > < span class = "lineno" > 531< / span >   < span class = "keywordflow" > case< / span > 32:< / div >
< div class = "line" > < a name = "l00532" > < / a > < span class = "lineno" > 532< / span >   faiss::hamming_count_thres < 256> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00533" > < / a > < span class = "lineno" > 533< / span >   n1, n2, ht, nptr);< / div >
< div class = "line" > < a name = "l00534" > < / a > < span class = "lineno" > 534< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00535" > < / a > < span class = "lineno" > 535< / span >   < span class = "keywordflow" > case< / span > 64:< / div >
< div class = "line" > < a name = "l00536" > < / a > < span class = "lineno" > 536< / span >   faiss::hamming_count_thres < 512> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00537" > < / a > < span class = "lineno" > 537< / span >   n1, n2, ht, nptr);< / div >
< div class = "line" > < a name = "l00538" > < / a > < span class = "lineno" > 538< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00539" > < / a > < span class = "lineno" > 539< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00540" > < / a > < span class = "lineno" > 540< / span >   FAISS_ASSERT (!< span class = "stringliteral" > " not-implemented for this number of bits" < / span > );< / div >
< div class = "line" > < a name = "l00541" > < / a > < span class = "lineno" > 541< / span >   }< / div >
< div class = "line" > < a name = "l00542" > < / a > < span class = "lineno" > 542< / span >   }< / div >
< div class = "line" > < a name = "l00543" > < / a > < span class = "lineno" > 543< / span >   < / div >
< div class = "line" > < a name = "l00544" > < / a > < span class = "lineno" > 544< / span >   < / div >
< div class = "line" > < a name = "l00545" > < / a > < span class = "lineno" > 545< / span >   < span class = "comment" > /* Count number of cross-matches given a threshold */< / span > < / div >
< div class = "line" > < a name = "l00546" > < / a > < span class = "lineno" > 546< / span >   < span class = "keywordtype" > void< / span > crosshamming_count_thres (< / div >
< div class = "line" > < a name = "l00547" > < / a > < span class = "lineno" > 547< / span >   < span class = "keyword" > const< / span > uint8_t * dbs,< / div >
< div class = "line" > < a name = "l00548" > < / a > < span class = "lineno" > 548< / span >   < span class = "keywordtype" > size_t< / span > n,< / div >
< div class = "line" > < a name = "l00549" > < / a > < span class = "lineno" > 549< / span >   hamdis_t ht,< / div >
< div class = "line" > < a name = "l00550" > < / a > < span class = "lineno" > 550< / span >   < span class = "keywordtype" > size_t< / span > ncodes,< / div >
< div class = "line" > < a name = "l00551" > < / a > < span class = "lineno" > 551< / span >   < span class = "keywordtype" > size_t< / span > * nptr)< / 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 >   < span class = "keywordflow" > switch< / span > (ncodes) {< / div >
< div class = "line" > < a name = "l00554" > < / a > < span class = "lineno" > 554< / span >   < span class = "keywordflow" > case< / span > 8:< / div >
< div class = "line" > < a name = "l00555" > < / a > < span class = "lineno" > 555< / span >   faiss::crosshamming_count_thres < 64> (C64(dbs), n, ht, nptr);< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00556" > < / a > < span class = "lineno" > 556< / span >   < span class = "keywordflow" > return< / span > ;< / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00557" > < / a > < span class = "lineno" > 557< / span >   < span class = "keywordflow" > case< / span > 16:< / div >
< div class = "line" > < a name = "l00558" > < / a > < span class = "lineno" > 558< / span >   faiss::crosshamming_count_thres < 128> (C64(dbs), n, ht, nptr);< / div >
< div class = "line" > < a name = "l00559" > < / a > < span class = "lineno" > 559< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00560" > < / a > < span class = "lineno" > 560< / span >   < span class = "keywordflow" > case< / span > 32:< / div >
< div class = "line" > < a name = "l00561" > < / a > < span class = "lineno" > 561< / span >   faiss::crosshamming_count_thres < 256> (C64(dbs), n, ht, nptr);< / div >
< div class = "line" > < a name = "l00562" > < / a > < span class = "lineno" > 562< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00563" > < / a > < span class = "lineno" > 563< / span >   < span class = "keywordflow" > case< / span > 64:< / div >
< div class = "line" > < a name = "l00564" > < / a > < span class = "lineno" > 564< / span >   faiss::crosshamming_count_thres < 512> (C64(dbs), n, ht, nptr);< / div >
< div class = "line" > < a name = "l00565" > < / a > < span class = "lineno" > 565< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00566" > < / a > < span class = "lineno" > 566< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00567" > < / a > < span class = "lineno" > 567< / span >   FAISS_ASSERT (!< span class = "stringliteral" > " not-implemented for this number of bits" < / span > );< / div >
< div class = "line" > < a name = "l00568" > < / a > < span class = "lineno" > 568< / 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 >   < / div >
< div class = "line" > < a name = "l00572" > < / a > < span class = "lineno" > 572< / span >   < span class = "comment" > /* Returns all matches given a threshold */< / span > < / div >
< div class = "line" > < a name = "l00573" > < / a > < span class = "lineno" > 573< / span >   < span class = "keywordtype" > size_t< / span > match_hamming_thres (< / div >
< div class = "line" > < a name = "l00574" > < / a > < span class = "lineno" > 574< / span >   < span class = "keyword" > const< / span > uint8_t * bs1,< / div >
< div class = "line" > < a name = "l00575" > < / a > < span class = "lineno" > 575< / span >   < span class = "keyword" > const< / span > uint8_t * bs2,< / div >
< div class = "line" > < a name = "l00576" > < / a > < span class = "lineno" > 576< / span >   < span class = "keywordtype" > size_t< / span > n1,< / div >
< div class = "line" > < a name = "l00577" > < / a > < span class = "lineno" > 577< / span >   < span class = "keywordtype" > size_t< / span > n2,< / div >
< div class = "line" > < a name = "l00578" > < / a > < span class = "lineno" > 578< / span >   hamdis_t ht,< / div >
< div class = "line" > < a name = "l00579" > < / a > < span class = "lineno" > 579< / span >   < span class = "keywordtype" > size_t< / span > ncodes,< / div >
< div class = "line" > < a name = "l00580" > < / a > < span class = "lineno" > 580< / span >   < span class = "keywordtype" > long< / span > * idx,< / div >
< div class = "line" > < a name = "l00581" > < / a > < span class = "lineno" > 581< / span >   hamdis_t * dis)< / div >
< div class = "line" > < a name = "l00582" > < / a > < span class = "lineno" > 582< / span >   {< / div >
< div class = "line" > < a name = "l00583" > < / a > < span class = "lineno" > 583< / span >   < span class = "keywordflow" > switch< / span > (ncodes) {< / div >
< div class = "line" > < a name = "l00584" > < / a > < span class = "lineno" > 584< / span >   < span class = "keywordflow" > case< / span > 8:< / div >
< div class = "line" > < a name = "l00585" > < / a > < span class = "lineno" > 585< / span >   < span class = "keywordflow" > return< / span > faiss::match_hamming_thres < 64> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00586" > < / a > < span class = "lineno" > 586< / span >   n1, n2, ht, idx, dis);< / div >
< div class = "line" > < a name = "l00587" > < / a > < span class = "lineno" > 587< / span >   < span class = "keywordflow" > case< / span > 16:< / div >
< div class = "line" > < a name = "l00588" > < / a > < span class = "lineno" > 588< / span >   < span class = "keywordflow" > return< / span > faiss::match_hamming_thres < 128> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00589" > < / a > < span class = "lineno" > 589< / span >   n1, n2, ht, idx, dis);< / div >
< div class = "line" > < a name = "l00590" > < / a > < span class = "lineno" > 590< / span >   < span class = "keywordflow" > case< / span > 32:< / div >
< div class = "line" > < a name = "l00591" > < / a > < span class = "lineno" > 591< / span >   < span class = "keywordflow" > return< / span > faiss::match_hamming_thres < 256> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00592" > < / a > < span class = "lineno" > 592< / span >   n1, n2, ht, idx, dis);< / div >
< div class = "line" > < a name = "l00593" > < / a > < span class = "lineno" > 593< / span >   < span class = "keywordflow" > case< / span > 64:< / div >
< div class = "line" > < a name = "l00594" > < / a > < span class = "lineno" > 594< / span >   < span class = "keywordflow" > return< / span > faiss::match_hamming_thres < 512> (C64(bs1), C64(bs2),< / div >
< div class = "line" > < a name = "l00595" > < / a > < span class = "lineno" > 595< / span >   n1, n2, ht, idx, dis);< / div >
< div class = "line" > < a name = "l00596" > < / a > < span class = "lineno" > 596< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00597" > < / a > < span class = "lineno" > 597< / span >   FAISS_ASSERT (!< span class = "stringliteral" > " not-implemented for this number of bits" < / span > );< / div >
< div class = "line" > < a name = "l00598" > < / a > < span class = "lineno" > 598< / span >   }< / div >
< div class = "line" > < a name = "l00599" > < / a > < span class = "lineno" > 599< / span >   }< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00600" > < / a > < span class = "lineno" > 600< / span >   < / div >
< div class = "line" > < a name = "l00601" > < / a > < span class = "lineno" > 601< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00602" > < / a > < span class = "lineno" > 602< / span >   < span class = "preprocessor" > #undef C64< / span > < / div >
< div class = "line" > < a name = "l00603" > < / a > < span class = "lineno" > 603< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00604" > < / a > < span class = "lineno" > 604< / span >   < / div >
< div class = "line" > < a name = "l00605" > < / a > < span class = "lineno" > 605< / span >   < / div >
< div class = "line" > < a name = "l00606" > < / a > < span class = "lineno" > 606< / span >   < span class = "comment" > /*************************************< / span > < / div >
< div class = "line" > < a name = "l00607" > < / a > < span class = "lineno" > 607< / span >   < span class = "comment" > * generalized Hamming distances< / span > < / div >
< div class = "line" > < a name = "l00608" > < / a > < span class = "lineno" > 608< / span >   < span class = "comment" > ************************************/< / 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 >   < / div >
< div class = "line" > < a name = "l00611" > < / a > < span class = "lineno" > 611< / span >   < / div >
< div class = "line" > < a name = "l00612" > < / a > < span class = "lineno" > 612< / span >   < span class = "keyword" > template< / span > < < span class = "keyword" > class< / span > HammingComputer> < / div >
< div class = "line" > < a name = "l00613" > < / a > < span class = "lineno" > 613< / span >   < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > hamming_dis_inner_loop (< / div >
< div class = "line" > < a name = "l00614" > < / a > < span class = "lineno" > 614< / span >   < span class = "keyword" > const< / span > uint8_t *ca,< / div >
< div class = "line" > < a name = "l00615" > < / a > < span class = "lineno" > 615< / span >   < span class = "keyword" > const< / span > uint8_t *cb,< / div >
< div class = "line" > < a name = "l00616" > < / a > < span class = "lineno" > 616< / span >   < span class = "keywordtype" > size_t< / span > nb,< / div >
< div class = "line" > < a name = "l00617" > < / a > < span class = "lineno" > 617< / span >   < span class = "keywordtype" > size_t< / span > code_size,< / div >
< div class = "line" > < a name = "l00618" > < / a > < span class = "lineno" > 618< / span >   < span class = "keywordtype" > int< / span > k,< / div >
< div class = "line" > < a name = "l00619" > < / a > < span class = "lineno" > 619< / span >   hamdis_t * bh_val_,< / div >
< div class = "line" > < a name = "l00620" > < / a > < span class = "lineno" > 620< / span >   < span class = "keywordtype" > long< / span > * bh_ids_)< / 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 >   HammingComputer hc (ca, code_size);< / div >
< div class = "line" > < a name = "l00624" > < / a > < span class = "lineno" > 624< / span >   < / div >
< div class = "line" > < a name = "l00625" > < / a > < span class = "lineno" > 625< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > j = 0; j < nb; j++) {< / div >
< div class = "line" > < a name = "l00626" > < / a > < span class = "lineno" > 626< / span >   < span class = "keywordtype" > int< / span > ndiff = hc.hamming (cb);< / div >
< div class = "line" > < a name = "l00627" > < / a > < span class = "lineno" > 627< / span >   cb += code_size;< / div >
< div class = "line" > < a name = "l00628" > < / a > < span class = "lineno" > 628< / span >   < span class = "keywordflow" > if< / span > (ndiff < bh_val_[0]) {< / div >
< div class = "line" > < a name = "l00629" > < / a > < span class = "lineno" > 629< / span >   maxheap_pop< hamdis_t> (k, bh_val_, bh_ids_);< / div >
< div class = "line" > < a name = "l00630" > < / a > < span class = "lineno" > 630< / span >   maxheap_push< hamdis_t> (k, bh_val_, bh_ids_, ndiff, j);< / div >
< div class = "line" > < a name = "l00631" > < / a > < span class = "lineno" > 631< / span >   }< / div >
< div class = "line" > < a name = "l00632" > < / a > < span class = "lineno" > 632< / span >   }< / div >
< div class = "line" > < a name = "l00633" > < / a > < span class = "lineno" > 633< / span >   }< / div >
< div class = "line" > < a name = "l00634" > < / a > < span class = "lineno" > 634< / span >   < / div >
< div class = "line" > < a name = "l00635" > < / a > < span class = "lineno" > < a class = "line" href = "namespacefaiss.html#ae81da42f6f40356f7525917b3acb54c8" > 635< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "namespacefaiss.html#ae81da42f6f40356f7525917b3acb54c8" > generalized_hammings_knn< / a > (< / div >
< div class = "line" > < a name = "l00636" > < / a > < span class = "lineno" > 636< / span >   < a class = "code" href = "structfaiss_1_1HeapArray.html" > int_maxheap_array_t< / a > * ha,< / div >
< div class = "line" > < a name = "l00637" > < / a > < span class = "lineno" > 637< / span >   < span class = "keyword" > const< / span > uint8_t * a,< / div >
< div class = "line" > < a name = "l00638" > < / a > < span class = "lineno" > 638< / span >   < span class = "keyword" > const< / span > uint8_t * b,< / div >
< div class = "line" > < a name = "l00639" > < / a > < span class = "lineno" > 639< / span >   < span class = "keywordtype" > size_t< / span > nb,< / div >
< div class = "line" > < a name = "l00640" > < / a > < span class = "lineno" > 640< / span >   < span class = "keywordtype" > size_t< / span > code_size,< / div >
< div class = "line" > < a name = "l00641" > < / a > < span class = "lineno" > 641< / span >   < span class = "keywordtype" > int< / span > ordered)< / 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 >   < span class = "keywordtype" > int< / span > na = ha-> < a class = "code" href = "structfaiss_1_1HeapArray.html#aad477a3907c3496159eaf4b375be4432" > nh< / a > ;< / div >
< div class = "line" > < a name = "l00644" > < / a > < span class = "lineno" > 644< / span >   < span class = "keywordtype" > int< / span > k = ha-> < a class = "code" href = "structfaiss_1_1HeapArray.html#a1ee98429c766c77235f78c6d9aa32bb4" > k< / a > ;< / 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 >   < span class = "keywordflow" > if< / span > (ordered)< / div >
< div class = "line" > < a name = "l00647" > < / a > < span class = "lineno" > 647< / span >   ha-> < a class = "code" href = "structfaiss_1_1HeapArray.html#a48afc496c73e982b8e10fde786628292" > heapify< / a > ();< / div >
< div class = "line" > < a name = "l00648" > < / a > < span class = "lineno" > 648< / span >   < / div >
< div class = "line" > < a name = "l00649" > < / a > < span class = "lineno" > 649< / span >   < span class = "preprocessor" > #pragma omp parallel for< / span > < / div >
< div class = "line" > < a name = "l00650" > < / a > < span class = "lineno" > 650< / span >   < span class = "preprocessor" > < / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < na; i++) {< / div >
< div class = "line" > < a name = "l00651" > < / a > < span class = "lineno" > 651< / span >   < span class = "keyword" > const< / span > uint8_t *ca = a + i * code_size;< / div >
< div class = "line" > < a name = "l00652" > < / a > < span class = "lineno" > 652< / span >   < span class = "keyword" > const< / span > uint8_t *cb = b;< / 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 >   hamdis_t * bh_val_ = ha-> < a class = "code" href = "structfaiss_1_1HeapArray.html#a4b131abb659e7d0ee315223270deac53" > val< / a > + i * k;< / div >
< div class = "line" > < a name = "l00655" > < / a > < span class = "lineno" > 655< / span >   < span class = "keywordtype" > long< / span > * bh_ids_ = ha-> < a class = "code" href = "structfaiss_1_1HeapArray.html#a22332dd179ce70e379addeaa47246cc2" > ids< / a > + i * k;< / div >
< div class = "line" > < a name = "l00656" > < / a > < span class = "lineno" > 656< / span >   < / div >
< div class = "line" > < a name = "l00657" > < / a > < span class = "lineno" > 657< / span >   < span class = "keywordflow" > switch< / span > (code_size) {< / div >
< div class = "line" > < a name = "l00658" > < / a > < span class = "lineno" > 658< / span >   < span class = "keywordflow" > case< / span > 8:< / div >
< div class = "line" > < a name = "l00659" > < / a > < span class = "lineno" > 659< / span >   hamming_dis_inner_loop< GenHammingComputer8> < / div >
< div class = "line" > < a name = "l00660" > < / a > < span class = "lineno" > 660< / span >   (ca, cb, nb, 8, k, bh_val_, bh_ids_);< / div >
< div class = "line" > < a name = "l00661" > < / a > < span class = "lineno" > 661< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00662" > < / a > < span class = "lineno" > 662< / span >   < span class = "keywordflow" > case< / span > 16:< / div >
< div class = "line" > < a name = "l00663" > < / a > < span class = "lineno" > 663< / span >   hamming_dis_inner_loop< GenHammingComputer16> < / div >
< div class = "line" > < a name = "l00664" > < / a > < span class = "lineno" > 664< / span >   (ca, cb, nb, 16, k, bh_val_, bh_ids_);< / div >
< div class = "line" > < a name = "l00665" > < / a > < span class = "lineno" > 665< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00666" > < / a > < span class = "lineno" > 666< / span >   < span class = "keywordflow" > case< / span > 32:< / div >
< div class = "line" > < a name = "l00667" > < / a > < span class = "lineno" > 667< / span >   hamming_dis_inner_loop< GenHammingComputer32> < / div >
< div class = "line" > < a name = "l00668" > < / a > < span class = "lineno" > 668< / span >   (ca, cb, nb, 32, k, bh_val_, bh_ids_);< / div >
< div class = "line" > < a name = "l00669" > < / a > < span class = "lineno" > 669< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00670" > < / a > < span class = "lineno" > 670< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00671" > < / a > < span class = "lineno" > 671< / span >   hamming_dis_inner_loop< GenHammingComputerM8> < / div >
< div class = "line" > < a name = "l00672" > < / a > < span class = "lineno" > 672< / span >   (ca, cb, nb, code_size, k, bh_val_, bh_ids_);< / div >
< div class = "line" > < a name = "l00673" > < / a > < span class = "lineno" > 673< / span >   < span class = "keywordflow" > break< / 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 >   }< / div >
2017-02-23 06:26:44 +08:00
< div class = "line" > < a name = "l00676" > < / a > < span class = "lineno" > 676< / span >   < / div >
2017-02-25 00:32:08 +08:00
< div class = "line" > < a name = "l00677" > < / a > < span class = "lineno" > 677< / span >   < span class = "keywordflow" > if< / span > (ordered)< / div >
< div class = "line" > < a name = "l00678" > < / a > < span class = "lineno" > 678< / span >   ha-> < a class = "code" href = "structfaiss_1_1HeapArray.html#a3c686b3cc0594e6a284fa3a595bebdec" > reorder< / a > ();< / div >
< div class = "line" > < a name = "l00679" > < / a > < span class = "lineno" > 679< / span >   < / div >
< div class = "line" > < a name = "l00680" > < / a > < span class = "lineno" > 680< / span >   }< / div >
< div class = "line" > < a name = "l00681" > < / a > < span class = "lineno" > 681< / span >   < / 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 = "comment" > // namespace faiss< / span > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1HeapArray_html_a1ee98429c766c77235f78c6d9aa32bb4" > < div class = "ttname" > < a href = "structfaiss_1_1HeapArray.html#a1ee98429c766c77235f78c6d9aa32bb4" > faiss::HeapArray::k< / a > < / div > < div class = "ttdeci" > size_t k< / div > < div class = "ttdoc" > allocated size per heap < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Heap_8h_source.html#l00356" > Heap.h:356< / a > < / div > < / div >
2017-02-25 00:32:08 +08:00
< div class = "ttc" id = "namespacefaiss_html_ae81da42f6f40356f7525917b3acb54c8" > < div class = "ttname" > < a href = "namespacefaiss.html#ae81da42f6f40356f7525917b3acb54c8" > faiss::generalized_hammings_knn< / a > < / div > < div class = "ttdeci" > void generalized_hammings_knn(int_maxheap_array_t *ha, const uint8_t *a, const uint8_t *b, size_t nb, size_t code_size, int ordered)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "hamming_8cpp_source.html#l00635" > hamming.cpp:635< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1HeapArray_html_a3c686b3cc0594e6a284fa3a595bebdec" > < div class = "ttname" > < a href = "structfaiss_1_1HeapArray.html#a3c686b3cc0594e6a284fa3a595bebdec" > faiss::HeapArray::reorder< / a > < / div > < div class = "ttdeci" > void reorder()< / div > < div class = "ttdoc" > reorder all the heaps < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Heap_8cpp_source.html#l00035" > Heap.cpp:35< / a > < / div > < / div >
< 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#l00351" > Heap.h:351< / a > < / div > < / div >
2017-02-25 00:32:08 +08:00
< div class = "ttc" id = "namespacefaiss_html_ac0b4dc73a8470d61f510396dc460ca18" > < div class = "ttname" > < a href = "namespacefaiss.html#ac0b4dc73a8470d61f510396dc460ca18" > faiss::hammings_knn< / a > < / div > < div class = "ttdeci" > void hammings_knn(int_maxheap_array_t *ha, const uint8_t *a, const uint8_t *b, size_t nb, size_t ncodes, int order)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "hamming_8cpp_source.html#l00475" > hamming.cpp:475< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
< div class = "ttc" id = "structfaiss_1_1HeapArray_html_a22332dd179ce70e379addeaa47246cc2" > < div class = "ttname" > < a href = "structfaiss_1_1HeapArray.html#a22332dd179ce70e379addeaa47246cc2" > faiss::HeapArray::ids< / a > < / div > < div class = "ttdeci" > TI * ids< / div > < div class = "ttdoc" > identifiers (size nh * k) < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Heap_8h_source.html#l00357" > Heap.h:357< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1HeapArray_html_a48afc496c73e982b8e10fde786628292" > < div class = "ttname" > < a href = "structfaiss_1_1HeapArray.html#a48afc496c73e982b8e10fde786628292" > faiss::HeapArray::heapify< / a > < / div > < div class = "ttdeci" > void heapify()< / div > < div class = "ttdoc" > prepare all the heaps before adding < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Heap_8cpp_source.html#l00027" > Heap.cpp:27< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_a0832c5ab58f4d1a340b0bde273c5b501" > < div class = "ttname" > < a href = "namespacefaiss.html#a0832c5ab58f4d1a340b0bde273c5b501" > faiss::hammings< / a > < / div > < div class = "ttdeci" > void hammings(const uint8_t *a, const uint8_t *b, size_t na, size_t nb, size_t nbytespercode, hamdis_t *dis)< / div > < / div >
< div class = "ttc" id = "structfaiss_1_1HeapArray_html_a4b131abb659e7d0ee315223270deac53" > < div class = "ttname" > < a href = "structfaiss_1_1HeapArray.html#a4b131abb659e7d0ee315223270deac53" > faiss::HeapArray::val< / a > < / div > < div class = "ttdeci" > T * val< / div > < div class = "ttdoc" > values (distances or similarities), size nh * k < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Heap_8h_source.html#l00358" > Heap.h:358< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1HeapArray_html_aad477a3907c3496159eaf4b375be4432" > < div class = "ttname" > < a href = "structfaiss_1_1HeapArray.html#aad477a3907c3496159eaf4b375be4432" > faiss::HeapArray::nh< / a > < / div > < div class = "ttdeci" > size_t nh< / div > < div class = "ttdoc" > number of heaps < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Heap_8h_source.html#l00355" > Heap.h:355< / a > < / div > < / div >
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