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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="title">LoadStoreOperators.cuh</div> </div>
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<div class="contents">
<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="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "Float16.cuh"</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#ifndef __HALF2_TO_UI</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor"></span><span class="comment">// cuda_fp16.hpp doesn't export this</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#define __HALF2_TO_UI(var) *(reinterpret_cast<unsigned int *>(&(var)))</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">//</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// Templated wrappers to express load/store for different scalar and vector</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// types, so kernels can have the same written form but can operate</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// over half and float, and on vector types transparently</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">//</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="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1LoadStore.html"> 30</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1LoadStore.html">LoadStore</a> {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ T load(<span class="keywordtype">void</span>* p) {</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">return</span> *((T*) p);</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> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">void</span> store(<span class="keywordtype">void</span>* p, <span class="keyword">const</span> T& v) {</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  *((T*) p) = v;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  }</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> <span class="preprocessor">#ifdef FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">template</span> <></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1LoadStore.html">LoadStore</a><Half4> {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 load(<span class="keywordtype">void</span>* p) {</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  Half4 out;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#if CUDA_VERSION >= 9000</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"ld.global.v2.u32 {%0, %1}, [%2];"</span> :</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="stringliteral">"=r"</span>(__HALF2_TO_UI(out.a)), <span class="stringliteral">"=r"</span>(__HALF2_TO_UI(out.b)) : <span class="stringliteral">"l"</span>(p));</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"ld.global.v2.u32 {%0, %1}, [%2];"</span> :</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="stringliteral">"=r"</span>(out.a.x), <span class="stringliteral">"=r"</span>(out.b.x) : <span class="stringliteral">"l"</span>(p));</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> out;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">void</span> store(<span class="keywordtype">void</span>* p, Half4& v) {</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#if CUDA_VERSION >= 9000</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"st.v2.u32 [%0], {%1, %2};"</span> : : <span class="stringliteral">"l"</span>(p),</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="stringliteral">"r"</span>(__HALF2_TO_UI(v.a)), <span class="stringliteral">"r"</span>(__HALF2_TO_UI(v.b)));</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"st.v2.u32 [%0], {%1, %2};"</span> : : <span class="stringliteral">"l"</span>(p), <span class="stringliteral">"r"</span>(v.a.x), <span class="stringliteral">"r"</span>(v.b.x));</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> };</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">template</span> <></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">struct </span>LoadStore<Half8> {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 load(<span class="keywordtype">void</span>* p) {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  Half8 out;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#if CUDA_VERSION >= 9000</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"ld.global.v4.u32 {%0, %1, %2, %3}, [%4];"</span> :</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="stringliteral">"=r"</span>(__HALF2_TO_UI(out.a.a)), <span class="stringliteral">"=r"</span>(__HALF2_TO_UI(out.a.b)),</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="stringliteral">"=r"</span>(__HALF2_TO_UI(out.b.a)), <span class="stringliteral">"=r"</span>(__HALF2_TO_UI(out.b.b)) : <span class="stringliteral">"l"</span>(p));</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"ld.global.v4.u32 {%0, %1, %2, %3}, [%4];"</span> :</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="stringliteral">"=r"</span>(out.a.a.x), <span class="stringliteral">"=r"</span>(out.a.b.x),</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="stringliteral">"=r"</span>(out.b.a.x), <span class="stringliteral">"=r"</span>(out.b.b.x) : <span class="stringliteral">"l"</span>(p));</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> out;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">void</span> store(<span class="keywordtype">void</span>* p, Half8& v) {</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#if CUDA_VERSION >= 9000</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"st.v4.u32 [%0], {%1, %2, %3, %4};"</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  : : <span class="stringliteral">"l"</span>(p), <span class="stringliteral">"r"</span>(__HALF2_TO_UI(v.a.a)), <span class="stringliteral">"r"</span>(__HALF2_TO_UI(v.a.b)),</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="stringliteral">"r"</span>(__HALF2_TO_UI(v.b.a)), <span class="stringliteral">"r"</span>(__HALF2_TO_UI(v.b.b)));</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor"></span> <span class="keyword">asm</span>(<span class="stringliteral">"st.v4.u32 [%0], {%1, %2, %3, %4};"</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  : : <span class="stringliteral">"l"</span>(p), <span class="stringliteral">"r"</span>(v.a.a.x), <span class="stringliteral">"r"</span>(v.a.b.x), <span class="stringliteral">"r"</span>(v.b.a.x), <span class="stringliteral">"r"</span>(v.b.b.x));</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> };</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor">#endif // FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> } } <span class="comment">// namespace</span></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1LoadStore_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1LoadStore.html">faiss::gpu::LoadStore</a></div><div class="ttdef"><b>Definition:</b> <a href="LoadStoreOperators_8cuh_source.html#l00030">LoadStoreOperators.cuh:30</a></div></div>
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