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<div class="title">test_blas.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <cstdio></span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <cstdlib></span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#undef FINTEGER</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor"></span><span class="preprocessor">#define FINTEGER long</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">/* declare BLAS functions, see http://www.netlib.org/clapack/cblas/ */</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keywordtype">int</span> sgemm_ (<span class="keyword">const</span> <span class="keywordtype">char</span> *transa, <span class="keyword">const</span> <span class="keywordtype">char</span> *transb, FINTEGER *m, FINTEGER *</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  n, FINTEGER *k, <span class="keyword">const</span> <span class="keywordtype">float</span> *alpha, <span class="keyword">const</span> <span class="keywordtype">float</span> *a,</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  FINTEGER *lda, <span class="keyword">const</span> <span class="keywordtype">float</span> *b, FINTEGER *</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  ldb, <span class="keywordtype">float</span> *beta, <span class="keywordtype">float</span> *c, FINTEGER *ldc);</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/* Lapack functions, see http://www.netlib.org/clapack/old/single/sgeqrf.c */</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keywordtype">int</span> sgeqrf_ (FINTEGER *m, FINTEGER *n, <span class="keywordtype">float</span> *a, FINTEGER *lda,</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordtype">float</span> *tau, <span class="keywordtype">float</span> *work, FINTEGER *lwork, FINTEGER *info);</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> }</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keywordtype">float</span> *new_random_vec(<span class="keywordtype">int</span> size)</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> {</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordtype">float</span> *x = <span class="keyword">new</span> <span class="keywordtype">float</span>[size];</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < size; i++)</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  x[i] = drand48();</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">return</span> x;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> }</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </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> <span class="keywordtype">int</span> main() {</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  FINTEGER m = 10, n = 20, k = 30;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">float</span> *a = new_random_vec(m * k), *b = new_random_vec(n * k), *c = <span class="keyword">new</span> <span class="keywordtype">float</span>[n * m];</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordtype">float</span> one = 1.0, zero = 0.0;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  printf(<span class="stringliteral">"BLAS test\n"</span>);</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  sgemm_(<span class="stringliteral">"Not transposed"</span>, <span class="stringliteral">"Not transposed"</span>,</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  &m, &n, &k, &one, a, &m, b, &k, &zero, c, &m);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  printf(<span class="stringliteral">"errors=\n"</span>);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < m; i++) {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < n; j++) {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">float</span> accu = 0;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> l = 0; l < k; l++)</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  accu += a[i + l * m] * b[l + j * k];</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  printf (<span class="stringliteral">"%6.3f "</span>, accu - c[i + j * m]);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  }</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  printf(<span class="stringliteral">"\n"</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="keywordtype">long</span> info = 0x64bL << 32;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordtype">long</span> mi = 0x64bL << 32 | m;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordtype">float</span> *tau = <span class="keyword">new</span> <span class="keywordtype">float</span>[m];</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  FINTEGER lwork = -1;</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="keywordtype">float</span> work1;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  printf(<span class="stringliteral">"Intentional Lapack error (appears only for 64-bit INTEGER):\n"</span>);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  sgeqrf_ (&mi, &n, c, &m, tau, &work1, &lwork, (FINTEGER*)&info);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">// sgeqrf_ (&m, &n, c, &zeroi, tau, &work1, &lwork, (FINTEGER*)&info);</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  printf(<span class="stringliteral">"info=%016lx\n"</span>, info);</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>  <span class="keywordflow">if</span>(info >> 32 == 0x64b) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  printf(<span class="stringliteral">"Lapack uses 32-bit integers\n"</span>);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  printf(<span class="stringliteral">"Lapack uses 64-bit integers\n"</span>);</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> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> }</div>
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