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<div class="title">LoadStoreOperators.cuh</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<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>&#160;<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>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor">#include &quot;Float16.cuh&quot;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment">// Templated wrappers to express load/store for different scalar and vector</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment">// types, so kernels can have the same written form but can operate</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment">// over half and float, and on vector types transparently</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1LoadStore.html"> 25</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1LoadStore.html">LoadStore</a> {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <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="l00027"></a><span class="lineno"> 27</span>&#160; <span class="keywordflow">return</span> *((T*) p);</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; }</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <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&amp; v) {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; *((T*) p) = v;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; }</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;};</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="preprocessor">#ifdef FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">template</span> &lt;&gt;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1LoadStore.html">LoadStore</a>&lt;Half4&gt; {</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <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="l00040"></a><span class="lineno"> 40</span>&#160; Half4 out;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keyword">asm</span>(<span class="stringliteral">&quot;ld.global.v2.u32 {%0, %1}, [%2];&quot;</span> :</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="stringliteral">&quot;=r&quot;</span>(out.a.x), <span class="stringliteral">&quot;=r&quot;</span>(out.b.x) : <span class="stringliteral">&quot;l&quot;</span>(p));</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordflow">return</span> out;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; }</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <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> Half4&amp; v) {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keyword">asm</span>(<span class="stringliteral">&quot;st.v2.u32 [%0], {%1, %2};&quot;</span> : : <span class="stringliteral">&quot;l&quot;</span>(p), <span class="stringliteral">&quot;r&quot;</span>(v.a.x), <span class="stringliteral">&quot;r&quot;</span>(v.b.x));</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; }</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;};</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="keyword">template</span> &lt;&gt;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="keyword">struct </span>LoadStore&lt;Half8&gt; {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <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="l00054"></a><span class="lineno"> 54</span>&#160; Half8 out;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keyword">asm</span>(<span class="stringliteral">&quot;ld.global.v4.u32 {%0, %1, %2, %3}, [%4];&quot;</span> :</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="stringliteral">&quot;=r&quot;</span>(out.a.a.x), <span class="stringliteral">&quot;=r&quot;</span>(out.a.b.x),</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="stringliteral">&quot;=r&quot;</span>(out.b.a.x), <span class="stringliteral">&quot;=r&quot;</span>(out.b.b.x) : <span class="stringliteral">&quot;l&quot;</span>(p));</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keywordflow">return</span> out;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; }</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <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> Half8&amp; v) {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keyword">asm</span>(<span class="stringliteral">&quot;st.v4.u32 [%0], {%1, %2, %3, %4};&quot;</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; : : <span class="stringliteral">&quot;l&quot;</span>(p), <span class="stringliteral">&quot;r&quot;</span>(v.a.a.x), <span class="stringliteral">&quot;r&quot;</span>(v.a.b.x), <span class="stringliteral">&quot;r&quot;</span>(v.b.a.x), <span class="stringliteral">&quot;r&quot;</span>(v.b.b.x));</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; }</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;};</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<span class="preprocessor">#endif // FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;} } <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#l00025">LoadStoreOperators.cuh:25</a></div></div>
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