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0df3f646fc
various bugfixes from github issues kmean with some frozen centroids GPU better tiling for large flat datasets default AVX for vector ops
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184 lines
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<li class="navelem"><a class="el" href="dir_6b3ae6988449b0834e9596fad5d75199.html">gpu</a></li><li class="navelem"><a class="el" href="dir_498271007b03b2a0521055e88776887b.html">utils</a></li> </ul>
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<div class="header">
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<div class="title">Limits.cuh</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
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<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>
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<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>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#pragma once</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "Float16.cuh"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "Pair.cuh"</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <limits></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Limits.html"> 20</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits</a> {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> };</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// Unfortunately we can't use constexpr because there is no</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// constexpr constructor for half</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// FIXME: faiss CPU uses +/-FLT_MAX instead of +/-infinity</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> constexpr <span class="keywordtype">float</span> kFloatMax = std::numeric_limits<float>::max();</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> constexpr <span class="keywordtype">float</span> kFloatMin = std::numeric_limits<float>::lowest();</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">template</span> <></div>
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<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Limits_3_01float_01_4.html"> 30</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits</a><float> {</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> <span class="keywordtype">float</span> getMin() {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">return</span> kFloatMin;</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  }</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> <span class="keywordtype">float</span> getMax() {</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">return</span> kFloatMax;</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  }</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> };</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#ifdef FAISS_USE_FLOAT16</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">inline</span> __device__ __host__ half kGetHalf(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> v) {</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  half h;</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  h.x = v;</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">return</span> h;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">template</span> <></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">struct </span>Limits<half> {</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> half getMin() {</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> kGetHalf(0xfbffU);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> half getMax() {</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span> kGetHalf(0x7bffU);</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> };</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#endif // FAISS_USE_FLOAT16</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> constexpr <span class="keywordtype">int</span> kIntMax = std::numeric_limits<int>::max();</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> constexpr <span class="keywordtype">int</span> kIntMin = std::numeric_limits<int>::lowest();</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">template</span> <></div>
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<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Limits_3_01int_01_4.html"> 63</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits</a><int> {</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> <span class="keywordtype">int</span> getMin() {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> kIntMin;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> <span class="keywordtype">int</span> getMax() {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> kIntMax;</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> };</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keyword">template</span><<span class="keyword">typename</span> K, <span class="keyword">typename</span> V></div>
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<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Limits_3_01Pair_3_01K_00_01V_01_4_01_4.html"> 73</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits</a><<a class="code" href="structfaiss_1_1gpu_1_1Pair.html">Pair</a><K, V>> {</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> <a class="code" href="structfaiss_1_1gpu_1_1Pair.html">Pair<K, V></a> getMin() {</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> <a class="code" href="structfaiss_1_1gpu_1_1Pair.html">Pair<K, V></a>(<a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits<K>::getMin</a>(), <a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits<V>::getMin</a>());</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">static</span> __device__ __host__ <span class="keyword">inline</span> <a class="code" href="structfaiss_1_1gpu_1_1Pair.html">Pair<K, V></a> getMax() {</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">return</span> <a class="code" href="structfaiss_1_1gpu_1_1Pair.html">Pair<K, V></a>(<a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits<K>::getMax</a>(), <a class="code" href="structfaiss_1_1gpu_1_1Limits.html">Limits<V>::getMax</a>());</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> };</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> } } <span class="comment">// namespace</span></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1Pair_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Pair.html">faiss::gpu::Pair</a></div><div class="ttdoc">A simple pair type for CUDA device usage. </div><div class="ttdef"><b>Definition:</b> <a href="Pair_8cuh_source.html#l00021">Pair.cuh:21</a></div></div>
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<div class="ttc" id="structfaiss_1_1gpu_1_1Limits_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Limits.html">faiss::gpu::Limits</a></div><div class="ttdef"><b>Definition:</b> <a href="Limits_8cuh_source.html#l00020">Limits.cuh:20</a></div></div>
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