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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>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<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> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "Float16.cuh"</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="comment">//</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// Templated wrappers to express math for different scalar and vector</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <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> <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> <span class="comment">//</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <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> </div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
<div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Math.html"> 25</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Math.html">Math</a> {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">typedef</span> T ScalarType;</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="keyword">static</span> <span class="keyword">inline</span> __device__ T add(T a, T b) {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">return</span> a + b;</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="keyword">static</span> <span class="keyword">inline</span> __device__ T sub(T a, T b) {</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">return</span> a - b;</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> </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ T mul(T a, T b) {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">return</span> a * b;</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="keyword">static</span> <span class="keyword">inline</span> __device__ T neg(T v) {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">return</span> -v;</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> <span class="comment"></span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> /// For a vector type, this is a horizontal add, returning sum(v_i)</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014"> 45</a></span> <span class="comment"></span> <span class="keyword">static</span> <span class="keyword">inline</span> __device__ T <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">reduceAdd</a>(T v) {</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">bool</span> lt(T a, T b) {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> a < b;</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> </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">bool</span> gt(T a, T b) {</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> a > b;</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> </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">bool</span> eq(T a, T b) {</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">return</span> a == b;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  }</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ T zero() {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> (T) 0;</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> };</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"><a class="line" href="structfaiss_1_1gpu_1_1Math_3_01float2_01_4.html"> 67</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Math.html">Math</a><float2> {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">typedef</span> <span class="keywordtype">float</span> ScalarType;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float2 add(float2 a, float2 b) {</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  float2 v;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  v.x = a.x + b.x;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  v.y = a.y + b.y;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">return</span> v;</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float2 sub(float2 a, float2 b) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  float2 v;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  v.x = a.x - b.x;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  v.y = a.y - b.y;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> v;</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="keyword">static</span> <span class="keyword">inline</span> __device__ float2 add(float2 a, <span class="keywordtype">float</span> b) {</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  float2 v;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  v.x = a.x + b;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  v.y = a.y + b;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> v;</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float2 sub(float2 a, <span class="keywordtype">float</span> b) {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  float2 v;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  v.x = a.x - b;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  v.y = a.y - b;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float2 mul(float2 a, float2 b) {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  float2 v;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  v.x = a.x * b.x;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  v.y = a.y * b.y;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float2 mul(float2 a, <span class="keywordtype">float</span> b) {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  float2 v;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  v.x = a.x * b;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  v.y = a.y * b;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  }</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float2 neg(float2 v) {</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  v.x = -v.x;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  v.y = -v.y;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">return</span> v;</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"></span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> /// For a vector type, this is a horizontal add, returning sum(v_i)</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Math_3_01float2_01_4.html#a7209fbfc90ac5108d2814a0eda921f31"> 119</a></span> <span class="comment"></span> <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">float</span> <a class="code" href="structfaiss_1_1gpu_1_1Math_3_01float2_01_4.html#a7209fbfc90ac5108d2814a0eda921f31">reduceAdd</a>(float2 v) {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span> v.x + v.y;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</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="comment">// not implemented for vector types</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">// static inline __device__ bool lt(float2 a, float2 b);</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">// static inline __device__ bool gt(float2 a, float2 b);</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="comment">// static inline __device__ bool eq(float2 a, float2 b);</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float2 zero() {</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  float2 v;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  v.x = 0.0f;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  v.y = 0.0f;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  }</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> };</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="keyword">template</span> <></div>
<div class="line"><a name="l00137"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Math_3_01float4_01_4.html"> 137</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Math.html">Math</a><float4> {</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">typedef</span> <span class="keywordtype">float</span> ScalarType;</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="keyword">static</span> <span class="keyword">inline</span> __device__ float4 add(float4 a, float4 b) {</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  float4 v;</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  v.x = a.x + b.x;</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  v.y = a.y + b.y;</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  v.z = a.z + b.z;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  v.w = a.w + b.w;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">return</span> v;</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float4 sub(float4 a, float4 b) {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  float4 v;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  v.x = a.x - b.x;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  v.y = a.y - b.y;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  v.z = a.z - b.z;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  v.w = a.w - b.w;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float4 add(float4 a, <span class="keywordtype">float</span> b) {</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  float4 v;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  v.x = a.x + b;</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  v.y = a.y + b;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  v.z = a.z + b;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  v.w = a.w + b;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float4 sub(float4 a, <span class="keywordtype">float</span> b) {</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  float4 v;</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  v.x = a.x - b;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  v.y = a.y - b;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  v.z = a.z - b;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  v.w = a.w - b;</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float4 mul(float4 a, float4 b) {</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  float4 v;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  v.x = a.x * b.x;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  v.y = a.y * b.y;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  v.z = a.z * b.z;</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  v.w = a.w * b.w;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  }</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float4 mul(float4 a, <span class="keywordtype">float</span> b) {</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  float4 v;</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  v.x = a.x * b;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  v.y = a.y * b;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  v.z = a.z * b;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  v.w = a.w * b;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float4 neg(float4 v) {</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  v.x = -v.x;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  v.y = -v.y;</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  v.z = -v.z;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  v.w = -v.w;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">return</span> v;</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="comment"></span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> /// For a vector type, this is a horizontal add, returning sum(v_i)</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Math_3_01float4_01_4.html#a6a6b9896d47254011701773b3379ab13"> 203</a></span> <span class="comment"></span> <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">float</span> <a class="code" href="structfaiss_1_1gpu_1_1Math_3_01float4_01_4.html#a6a6b9896d47254011701773b3379ab13">reduceAdd</a>(float4 v) {</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">return</span> v.x + v.y + v.z + v.w;</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> </div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="comment">// not implemented for vector types</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// static inline __device__ bool lt(float4 a, float4 b);</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// static inline __device__ bool gt(float4 a, float4 b);</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// static inline __device__ bool eq(float4 a, float4 b);</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ float4 zero() {</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  float4 v;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  v.x = 0.0f;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  v.y = 0.0f;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  v.z = 0.0f;</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  v.w = 0.0f;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  }</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> </div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="preprocessor">#ifdef FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="keyword">template</span> <></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="keyword">struct </span>Math<half> {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">typedef</span> half ScalarType;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half add(half a, half b) {</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hadd(a, b);</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __float2half(__half2float(a) + __half2float(b));</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half sub(half a, half b) {</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hsub(a, b);</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __float2half(__half2float(a) - __half2float(b));</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half mul(half a, half b) {</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hmul(a, b);</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __float2half(__half2float(a) * __half2float(b));</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half neg(half v) {</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hneg(v);</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __float2half(-__half2float(v));</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="preprocessor"></span> }</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">reduceAdd</a>(half v) {</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">return</span> v;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">bool</span> lt(half a, half b) {</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hlt(a, b);</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __half2float(a) < __half2float(b);</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">bool</span> gt(half a, half b) {</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hgt(a, b);</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __half2float(a) > __half2float(b);</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ <span class="keywordtype">bool</span> eq(half a, half b) {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __heq(a, b);</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __half2float(a) == __half2float(b);</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half zero() {</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  half h;</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  h.x = 0;</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  }</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> };</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="keyword">template</span> <></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="keyword">struct </span>Math<half2> {</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keyword">typedef</span> half ScalarType;</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> </div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half2 add(half2 a, half2 b) {</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hadd2(a, b);</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="preprocessor"></span> float2 af = __half22float2(a);</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  float2 bf = __half22float2(b);</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  af.x += bf.x;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  af.y += bf.y;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> </div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">return</span> __float22half2_rn(af);</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="preprocessor"></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">static</span> <span class="keyword">inline</span> __device__ half2 sub(half2 a, half2 b) {</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hsub2(a, b);</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="preprocessor"></span> float2 af = __half22float2(a);</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  float2 bf = __half22float2(b);</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>  af.x -= bf.x;</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  af.y -= bf.y;</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keywordflow">return</span> __float22half2_rn(af);</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> </div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half2 add(half2 a, half b) {</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="preprocessor"></span> half2 b2 = __half2half2(b);</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">return</span> __hadd2(a, b2);</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="preprocessor"></span> float2 af = __half22float2(a);</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordtype">float</span> bf = __half2float(b);</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  af.x += bf;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  af.y += bf;</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>  <span class="keywordflow">return</span> __float22half2_rn(af);</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="preprocessor"></span> }</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half2 sub(half2 a, half b) {</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="preprocessor"></span> half2 b2 = __half2half2(b);</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">return</span> __hsub2(a, b2);</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="preprocessor"></span> float2 af = __half22float2(a);</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordtype">float</span> bf = __half2float(b);</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>  af.x -= bf;</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  af.y -= bf;</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> </div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">return</span> __float22half2_rn(af);</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half2 mul(half2 a, half2 b) {</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hmul2(a, b);</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="preprocessor"></span> float2 af = __half22float2(a);</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  float2 bf = __half22float2(b);</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  af.x *= bf.x;</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  af.y *= bf.y;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keywordflow">return</span> __float22half2_rn(af);</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="preprocessor"></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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half2 mul(half2 a, half b) {</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="preprocessor"></span> half2 b2 = __half2half2(b);</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">return</span> __hmul2(a, b2);</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="preprocessor"></span> float2 af = __half22float2(a);</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordtype">float</span> bf = __half2float(b);</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  af.x *= bf;</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  af.y *= bf;</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>  <span class="keywordflow">return</span> __float22half2_rn(af);</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="preprocessor"></span> }</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="keyword">static</span> <span class="keyword">inline</span> __device__ half2 neg(half2 v) {</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="preprocessor"></span> <span class="keywordflow">return</span> __hneg2(v);</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="preprocessor"></span> float2 vf = __half22float2(v);</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  vf.x = -vf.x;</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  vf.y = -vf.y;</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> </div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordflow">return</span> __float22half2_rn(vf);</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="preprocessor"></span> }</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">reduceAdd</a>(half2 v) {</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="preprocessor">#ifdef FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="preprocessor"></span> half hv = __high2half(v);</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  half lv = __low2half(v);</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">return</span> __hadd(hv, lv);</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="preprocessor"></span> float2 vf = __half22float2(v);</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  vf.x += vf.y;</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> </div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">return</span> __float2half(vf.x);</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="preprocessor"></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>  <span class="comment">// not implemented for vector types</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="comment">// static inline __device__ bool lt(half2 a, half2 b);</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="comment">// static inline __device__ bool gt(half2 a, half2 b);</span></div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="comment">// static inline __device__ bool eq(half2 a, half2 b);</span></div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span> </div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half2 zero() {</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">return</span> __half2half2(Math<half>::zero());</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> };</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> </div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="keyword">template</span> <></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="keyword">struct </span>Math<Half4> {</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keyword">typedef</span> half ScalarType;</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> </div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 add(Half4 a, Half4 b) {</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  Half4 h;</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  h.a = Math<half2>::add(a.a, b.a);</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  h.b = Math<half2>::add(a.b, b.b);</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  }</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 sub(Half4 a, Half4 b) {</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  Half4 h;</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  h.a = Math<half2>::sub(a.a, b.a);</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  h.b = Math<half2>::sub(a.b, b.b);</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  }</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> </div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 add(Half4 a, half b) {</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  Half4 h;</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  h.a = Math<half2>::add(a.a, b);</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  h.b = Math<half2>::add(a.b, b);</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">return</span> h;</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="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 sub(Half4 a, half b) {</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  Half4 h;</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  h.a = Math<half2>::sub(a.a, b);</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  h.b = Math<half2>::sub(a.b, b);</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  }</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>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 mul(Half4 a, Half4 b) {</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  Half4 h;</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  h.a = Math<half2>::mul(a.a, b.a);</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  h.b = Math<half2>::mul(a.b, b.b);</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  }</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> </div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 mul(Half4 a, half b) {</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  Half4 h;</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  h.a = Math<half2>::mul(a.a, b);</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  h.b = Math<half2>::mul(a.b, b);</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  }</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span> </div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 neg(Half4 v) {</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  Half4 h;</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  h.a = Math<half2>::neg(v.a);</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  h.b = Math<half2>::neg(v.b);</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">return</span> h;</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"> 475</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">reduceAdd</a>(Half4 v) {</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  half hx = <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">Math<half2>::reduceAdd</a>(v.a);</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  half hy = <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">Math<half2>::reduceAdd</a>(v.b);</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="keywordflow">return</span> Math<half>::add(hx, hy);</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  }</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> </div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="comment">// not implemented for vector types</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="comment">// static inline __device__ bool lt(Half4 a, Half4 b);</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="comment">// static inline __device__ bool gt(Half4 a, Half4 b);</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="comment">// static inline __device__ bool eq(Half4 a, Half4 b);</span></div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span> </div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half4 zero() {</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  Half4 h;</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  h.a = Math<half2>::zero();</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  h.b = Math<half2>::zero();</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  }</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> };</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> </div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="keyword">template</span> <></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="keyword">struct </span>Math<Half8> {</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keyword">typedef</span> half ScalarType;</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 add(Half8 a, Half8 b) {</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  Half8 h;</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  h.a = Math<Half4>::add(a.a, b.a);</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  h.b = Math<Half4>::add(a.b, b.b);</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  }</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> </div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 sub(Half8 a, Half8 b) {</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  Half8 h;</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  h.a = Math<Half4>::sub(a.a, b.a);</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  h.b = Math<Half4>::sub(a.b, b.b);</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keywordflow">return</span> h;</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="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 add(Half8 a, half b) {</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  Half8 h;</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  h.a = Math<Half4>::add(a.a, b);</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  h.b = Math<Half4>::add(a.b, b);</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  }</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span> </div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 sub(Half8 a, half b) {</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  Half8 h;</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  h.a = Math<Half4>::sub(a.a, b);</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  h.b = Math<Half4>::sub(a.b, b);</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  }</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> </div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 mul(Half8 a, Half8 b) {</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  Half8 h;</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  h.a = Math<Half4>::mul(a.a, b.a);</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  h.b = Math<Half4>::mul(a.b, b.b);</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  }</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> </div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 mul(Half8 a, half b) {</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  Half8 h;</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  h.a = Math<Half4>::mul(a.a, b);</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  h.b = Math<Half4>::mul(a.b, b);</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  }</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span> </div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 neg(Half8 v) {</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  Half8 h;</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  h.a = Math<Half4>::neg(v.a);</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  h.b = Math<Half4>::neg(v.b);</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  }</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span> </div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ half <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">reduceAdd</a>(Half8 v) {</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  half hx = <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">Math<Half4>::reduceAdd</a>(v.a);</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  half hy = <a class="code" href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">Math<Half4>::reduceAdd</a>(v.b);</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">return</span> Math<half>::add(hx, hy);</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  }</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="comment">// not implemented for vector types</span></div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  <span class="comment">// static inline __device__ bool lt(Half8 a, Half8 b);</span></div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="comment">// static inline __device__ bool gt(Half8 a, Half8 b);</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="comment">// static inline __device__ bool eq(Half8 a, Half8 b);</span></div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> </div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="keyword">static</span> <span class="keyword">inline</span> __device__ Half8 zero() {</div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  Half8 h;</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  h.a = Math<Half4>::zero();</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  h.b = Math<Half4>::zero();</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keywordflow">return</span> h;</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  }</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span> };</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> </div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> <span class="preprocessor">#endif // FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span> } } <span class="comment">// namespace</span></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1Math_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Math.html">faiss::gpu::Math</a></div><div class="ttdef"><b>Definition:</b> <a href="MathOperators_8cuh_source.html#l00025">MathOperators.cuh:25</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1Math_html_a4b17f0b5d014f300e76dde5b24af8014"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Math.html#a4b17f0b5d014f300e76dde5b24af8014">faiss::gpu::Math::reduceAdd</a></div><div class="ttdeci">static __device__ T reduceAdd(T v)</div><div class="ttdoc">For a vector type, this is a horizontal add, returning sum(v_i) </div><div class="ttdef"><b>Definition:</b> <a href="MathOperators_8cuh_source.html#l00045">MathOperators.cuh:45</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1Math_3_01float2_01_4_html_a7209fbfc90ac5108d2814a0eda921f31"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Math_3_01float2_01_4.html#a7209fbfc90ac5108d2814a0eda921f31">faiss::gpu::Math< float2 >::reduceAdd</a></div><div class="ttdeci">static __device__ float reduceAdd(float2 v)</div><div class="ttdoc">For a vector type, this is a horizontal add, returning sum(v_i) </div><div class="ttdef"><b>Definition:</b> <a href="MathOperators_8cuh_source.html#l00119">MathOperators.cuh:119</a></div></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1Math_3_01float4_01_4_html_a6a6b9896d47254011701773b3379ab13"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Math_3_01float4_01_4.html#a6a6b9896d47254011701773b3379ab13">faiss::gpu::Math< float4 >::reduceAdd</a></div><div class="ttdeci">static __device__ float reduceAdd(float4 v)</div><div class="ttdoc">For a vector type, this is a horizontal add, returning sum(v_i) </div><div class="ttdef"><b>Definition:</b> <a href="MathOperators_8cuh_source.html#l00203">MathOperators.cuh:203</a></div></div>
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