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<a href="fast__math_8h.html">Go to the documentation of this file.</a><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) 2017-2019, NVIDIA CORPORATION. All rights reserved.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * provided that the following conditions are met:</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * * Redistributions of source code must retain the above copyright notice, this list of</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * conditions and the following disclaimer.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * * Redistributions in binary form must reproduce the above copyright notice, this list of</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * conditions and the following disclaimer in the documentation and/or other materials</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * provided with the distribution.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * to endorse or promote products derived from this software without specific prior written</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * permission.</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> *</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> *</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> **************************************************************************************************/</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#pragma once</span></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="preprocessor">#include <cstdint></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "<a class="code" href="cutlass_8h.html">cutlass/cutlass.h</a>"</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span><a class="code" href="namespacecutlass.html">cutlass</a> {</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> <span class="comment">/******************************************************************************</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * Static math utilities</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> ******************************************************************************/</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> N></div><div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="structcutlass_1_1is__pow2.html"> 46</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1is__pow2.html">is_pow2</a> {</div><div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252"> 47</a></span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> <a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> = ((N & (N - 1)) == 0);</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> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> N, <span class="keywordtype">int</span> CurrentVal = N, <span class="keywordtype">int</span> Count = 0></div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__down.html"> 54</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1log2__down.html">log2_down</a> {</div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__down.html#a4152ab42ed34b9011b50bcadce09a9d5a23d1b50f2f02e1026d4b5dc7ebd6880d"> 56</a></span>  <span class="keyword">enum</span> { <a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> = <a class="code" href="structcutlass_1_1log2__down.html">log2_down<N, (CurrentVal ></a>> 1), Count + 1>::<a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> };</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> };</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// Base case</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> N, <span class="keywordtype">int</span> Count></div><div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__down_3_01N_00_011_00_01Count_01_4.html"> 61</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1log2__down.html">log2_down</a><N, 1, Count> {</div><div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__down_3_01N_00_011_00_01Count_01_4.html#a5557a2049ecabc297e8a1d97fde4d4d7a282c4c5d8f66dc49544f34071f148b1f"> 62</a></span>  <span class="keyword">enum</span> { <a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> = Count };</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="l00068"></a><span class="lineno"> 68</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> N, <span class="keywordtype">int</span> CurrentVal = N, <span class="keywordtype">int</span> Count = 0></div><div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__up.html"> 69</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1log2__up.html">log2_up</a> {</div><div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__up.html#ad0bb5e85c86376923a4f6008e0ee3d50a09591054a7c9b184769d579c56dd09d6"> 71</a></span>  <span class="keyword">enum</span> { <a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> = <a class="code" href="structcutlass_1_1log2__up.html">log2_up<N, (CurrentVal ></a>> 1), Count + 1>::<a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> };</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> };</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">// Base case</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> N, <span class="keywordtype">int</span> Count></div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__up_3_01N_00_011_00_01Count_01_4.html"> 76</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1log2__up.html">log2_up</a><N, 1, Count> {</div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="structcutlass_1_1log2__up_3_01N_00_011_00_01Count_01_4.html#a29b8082ce3fef34fe055a978973fee6ca6b6af5b6bf14ee5d3e3f1442e7f75117"> 77</a></span>  <span class="keyword">enum</span> { <a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> = ((1 << Count) < N) ? Count + 1 : Count };</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> };</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> N></div><div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="structcutlass_1_1sqrt__est.html"> 84</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1sqrt__est.html">sqrt_est</a> {</div><div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="structcutlass_1_1sqrt__est.html#ab199edc94a4c60069536cb3d936f50f5a2e73d046302be2504f50c08d788e9964"> 85</a></span>  <span class="keyword">enum</span> { <a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> = 1 << (<a class="code" href="structcutlass_1_1log2__up.html">log2_up<N>::value</a> / 2) };</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> };</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> Div<span class="keywordtype">id</span>end, <span class="keywordtype">int</span> Divisor></div><div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="structcutlass_1_1divide__assert.html"> 93</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1divide__assert.html">divide_assert</a> {</div><div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="structcutlass_1_1divide__assert.html#a86eb818da255fb6ad4640991b3706c9fab924a64662c2eb917b1dd4ca31fdd2dc"> 94</a></span>  <span class="keyword">enum</span> { <a class="code" href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">value</a> = Dividend / Divisor };</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="platform_8h.html#adde4c9ea91b753491851361a4198c009">static_assert</a>((Dividend % Divisor == 0), <span class="stringliteral">"Not an even multiple"</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> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">/******************************************************************************</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * Rounding</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> ******************************************************************************/</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">template</span> <<span class="keyword">typename</span> div<span class="keywordtype">id</span>end_t, <span class="keyword">typename</span> divisor_t></div><div class="line"><a name="l00107"></a><span class="lineno"><a class="line" href="namespacecutlass.html#a17c8c408d672d26f1c70d2435f6ac83e"> 107</a></span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> dividend_t <a class="code" href="namespacecutlass.html#a17c8c408d672d26f1c70d2435f6ac83e">round_nearest</a>(dividend_t dividend, divisor_t divisor) {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> ((dividend + divisor - 1) / divisor) * divisor;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> }</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="keyword">template</span> <<span class="keyword">typename</span> value_t></div><div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="namespacecutlass.html#a38481ebfe13bc199aa621ceecfa016b8"> 115</a></span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> value_t <a class="code" href="namespacecutlass.html#a38481ebfe13bc199aa621ceecfa016b8">gcd</a>(value_t a, value_t b) {</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">for</span> (;;) {</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">if</span> (a == 0) <span class="keywordflow">return</span> b;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  b %= a;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (b == 0) <span class="keywordflow">return</span> a;</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  a %= b;</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> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">template</span> <<span class="keyword">typename</span> value_t></div><div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="namespacecutlass.html#af07506fee11de882d926f4e8237eef09"> 128</a></span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> value_t <a class="code" href="namespacecutlass.html#af07506fee11de882d926f4e8237eef09">lcm</a>(value_t a, value_t b) {</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  value_t temp = <a class="code" href="namespacecutlass.html#a38481ebfe13bc199aa621ceecfa016b8">gcd</a>(a, b);</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">return</span> temp ? (a / temp * b) : 0;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> }</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keyword">template</span> <<span class="keyword">typename</span> value_t></div><div class="line"><a name="l00140"></a><span class="lineno"><a class="line" href="namespacecutlass.html#a6bc666acc9f0d7278a788975e226e005"> 140</a></span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> value_t <a class="code" href="namespacecutlass.html#a6bc666acc9f0d7278a788975e226e005">clz</a>(value_t x) {</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 31; i >= 0; --i) {</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">if</span> ((1 << i) & x) <span class="keywordflow">return</span> 31 - i;</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  }</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> 32;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> }</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="keyword">template</span> <<span class="keyword">typename</span> value_t></div><div class="line"><a name="l00148"></a><span class="lineno"><a class="line" href="namespacecutlass.html#a58a119c3f7b33d97c43ae8c114004d9e"> 148</a></span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> value_t <a class="code" href="namespacecutlass.html#a58a119c3f7b33d97c43ae8c114004d9e">find_log2</a>(value_t x) {</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordtype">int</span> a = int(31 - <a class="code" href="namespacecutlass.html#a6bc666acc9f0d7278a788975e226e005">clz</a>(x));</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  a += (x & (x - 1)) != 0; <span class="comment">// Round up, add 1 if not a power of 2.</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">return</span> a;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> }</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> </div><div class="line"><a name="l00159"></a><span class="lineno"><a class="line" href="namespacecutlass.html#aac63a770acddafd828619834cf2c99d3"> 159</a></span> <span class="keywordtype">void</span> <a class="code" href="namespacecutlass.html#aac63a770acddafd828619834cf2c99d3">find_divisor</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>& mul, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>& shr, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> denom) {</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">if</span> (denom == 1) {</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  mul = 0;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  shr = 0;</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> p = 31 + <a class="code" href="namespacecutlass.html#a58a119c3f7b33d97c43ae8c114004d9e">find_log2</a>(denom);</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">unsigned</span> m = unsigned(((1ull << p) + <span class="keywordtype">unsigned</span>(denom) - 1) / <span class="keywordtype">unsigned</span>(denom));</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>  mul = m;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  shr = p - 32;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> }</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> </div><div class="line"><a name="l00176"></a><span class="lineno"><a class="line" href="namespacecutlass.html#ab9726f5a6b39322cf13cd916257fd9a7"> 176</a></span> <span class="keywordtype">void</span> <a class="code" href="namespacecutlass.html#ab9726f5a6b39322cf13cd916257fd9a7">fast_divmod</a>(<span class="keywordtype">int</span>& quo, <span class="keywordtype">int</span>& rem, <span class="keywordtype">int</span> src, <span class="keywordtype">int</span> div, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> mul, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> shr) {</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> </div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor"> #if defined(__CUDA_ARCH__)</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// Use IMUL.HI if div != 1, else simply copy the source.</span></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  quo = (div != 1) ? __umulhi(src, mul) >> shr : src;</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="preprocessor"> #else</span></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  quo = int((div != 1) ? <span class="keywordtype">int</span>(src * mul) >> shr : src);</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="preprocessor"> #endif</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="comment">// The remainder.</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  rem = src - (quo * div);</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> }</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment">// For long int input</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a></div><div class="line"><a name="l00192"></a><span class="lineno"><a class="line" href="namespacecutlass.html#ae051c9a8142f8ccea23a3998a7c4a8dc"> 192</a></span> <span class="keywordtype">void</span> <a class="code" href="namespacecutlass.html#ab9726f5a6b39322cf13cd916257fd9a7">fast_divmod</a>(<span class="keywordtype">int</span>& quo, int64_t& rem, int64_t src, <span class="keywordtype">int</span> div, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> mul, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> shr) {</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="preprocessor"> #if defined(__CUDA_ARCH__)</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">// Use IMUL.HI if div != 1, else simply copy the source.</span></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  quo = (div != 1) ? __umulhi(src, mul) >> shr : src;</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor"> #else</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  quo = int((div != 1) ? (src * mul) >> shr : src);</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="preprocessor"> #endif</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">// The remainder.</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  rem = src - (quo * div);</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> }</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment">/******************************************************************************</span></div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment"> * Min/Max</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment"> ******************************************************************************/</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> A, <span class="keywordtype">int</span> B></div><div class="line"><a name="l00209"></a><span class="lineno"><a class="line" href="structcutlass_1_1Min.html"> 209</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1Min.html">Min</a> {</div><div class="line"><a name="l00210"></a><span class="lineno"><a class="line" href="structcutlass_1_1Min.html#a97e6dd3ff6fb5404e8a6e6109f73f429"> 210</a></span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <span class="keyword">const</span> kValue = (A < B) ? A : B;</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> </div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> A, <span class="keywordtype">int</span> B></div><div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="structcutlass_1_1Max.html"> 214</a></span> <span class="keyword">struct </span><a class="code" href="structcutlass_1_1Max.html">Max</a> {</div><div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="structcutlass_1_1Max.html#a6ed8be7ed855eea8f8d08921f7b5d763"> 215</a></span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <span class="keyword">const</span> kValue = (A > B) ? A : B;</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> };</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a></div><div class="line"><a name="l00219"></a><span class="lineno"><a class="line" href="namespacecutlass.html#a1676e17a7fea0ac40d9d239cbd3ce872"> 219</a></span> <a class="code" href="platform_8h.html#a72f0657181cca64b44eb186b707eb380">constexpr</a> <span class="keywordtype">int</span> <a class="code" href="namespacecutlass.html#a1676e17a7fea0ac40d9d239cbd3ce872">const_min</a>(<span class="keywordtype">int</span> a, <span class="keywordtype">int</span> b) {</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">return</span> (b < a ? b : a);</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> </div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a></div><div class="line"><a name="l00224"></a><span class="lineno"><a class="line" href="namespacecutlass.html#a072919006084ca52479a69cd10694448"> 224</a></span> <a class="code" href="platform_8h.html#a72f0657181cca64b44eb186b707eb380">constexpr</a> <span class="keywordtype">int</span> <a class="code" href="namespacecutlass.html#a072919006084ca52479a69cd10694448">const_max</a>(<span class="keywordtype">int</span> a, <span class="keywordtype">int</span> b) {</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">return</span> (b > a ? b : a);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> }</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="comment">// namespace cutlass</span></div><div class="ttc" id="namespacecutlass_html"><div class="ttname"><a href="namespacecutlass.html">cutlass</a></div><div class="ttdef"><b>Definition:</b> aligned_buffer.h:35</div></div>
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<div class="ttc" id="platform_8h_html_a72f0657181cca64b44eb186b707eb380"><div class="ttname"><a href="platform_8h.html#a72f0657181cca64b44eb186b707eb380">constexpr</a></div><div class="ttdeci">#define constexpr</div><div class="ttdef"><b>Definition:</b> platform.h:137</div></div>
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<div class="ttc" id="namespacecutlass_html_ab9726f5a6b39322cf13cd916257fd9a7"><div class="ttname"><a href="namespacecutlass.html#ab9726f5a6b39322cf13cd916257fd9a7">cutlass::fast_divmod</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE void fast_divmod(int &quo, int &rem, int src, int div, unsigned int mul, unsigned int shr)</div><div class="ttdef"><b>Definition:</b> fast_math.h:176</div></div>
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<div class="ttc" id="namespacecutlass_html_a58a119c3f7b33d97c43ae8c114004d9e"><div class="ttname"><a href="namespacecutlass.html#a58a119c3f7b33d97c43ae8c114004d9e">cutlass::find_log2</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE value_t find_log2(value_t x)</div><div class="ttdef"><b>Definition:</b> fast_math.h:148</div></div>
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<div class="ttc" id="structcutlass_1_1log2__down_html"><div class="ttname"><a href="structcutlass_1_1log2__down.html">cutlass::log2_down</a></div><div class="ttdef"><b>Definition:</b> fast_math.h:54</div></div>
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<div class="ttc" id="structcutlass_1_1Min_html"><div class="ttname"><a href="structcutlass_1_1Min.html">cutlass::Min</a></div><div class="ttdef"><b>Definition:</b> fast_math.h:209</div></div>
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<div class="ttc" id="namespacecutlass_html_a072919006084ca52479a69cd10694448"><div class="ttname"><a href="namespacecutlass.html#a072919006084ca52479a69cd10694448">cutlass::const_max</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE constexpr int const_max(int a, int b)</div><div class="ttdef"><b>Definition:</b> fast_math.h:224</div></div>
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<div class="ttc" id="structcutlass_1_1is__pow2_html_acdfaa8d35a35ed129d4cdb969e813252"><div class="ttname"><a href="structcutlass_1_1is__pow2.html#acdfaa8d35a35ed129d4cdb969e813252">cutlass::is_pow2::value</a></div><div class="ttdeci">static bool const value</div><div class="ttdef"><b>Definition:</b> fast_math.h:47</div></div>
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<div class="ttc" id="namespacecutlass_html_af07506fee11de882d926f4e8237eef09"><div class="ttname"><a href="namespacecutlass.html#af07506fee11de882d926f4e8237eef09">cutlass::lcm</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE value_t lcm(value_t a, value_t b)</div><div class="ttdef"><b>Definition:</b> fast_math.h:128</div></div>
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<div class="ttc" id="namespacecutlass_html_a17c8c408d672d26f1c70d2435f6ac83e"><div class="ttname"><a href="namespacecutlass.html#a17c8c408d672d26f1c70d2435f6ac83e">cutlass::round_nearest</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE dividend_t round_nearest(dividend_t dividend, divisor_t divisor)</div><div class="ttdef"><b>Definition:</b> fast_math.h:107</div></div>
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<div class="ttc" id="cutlass_8h_html_a28c2443a142676d3d71effdae1a986b1"><div class="ttname"><a href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a></div><div class="ttdeci">#define CUTLASS_HOST_DEVICE</div><div class="ttdef"><b>Definition:</b> cutlass.h:89</div></div>
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<div class="ttc" id="platform_8h_html_adde4c9ea91b753491851361a4198c009"><div class="ttname"><a href="platform_8h.html#adde4c9ea91b753491851361a4198c009">static_assert</a></div><div class="ttdeci">#define static_assert(__e, __m)</div><div class="ttdef"><b>Definition:</b> platform.h:153</div></div>
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<div class="ttc" id="structcutlass_1_1Max_html"><div class="ttname"><a href="structcutlass_1_1Max.html">cutlass::Max</a></div><div class="ttdef"><b>Definition:</b> fast_math.h:214</div></div>
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<div class="ttc" id="namespacecutlass_html_aac63a770acddafd828619834cf2c99d3"><div class="ttname"><a href="namespacecutlass.html#aac63a770acddafd828619834cf2c99d3">cutlass::find_divisor</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE void find_divisor(unsigned int &mul, unsigned int &shr, unsigned int denom)</div><div class="ttdef"><b>Definition:</b> fast_math.h:159</div></div>
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<div class="ttc" id="namespacecutlass_html_a38481ebfe13bc199aa621ceecfa016b8"><div class="ttname"><a href="namespacecutlass.html#a38481ebfe13bc199aa621ceecfa016b8">cutlass::gcd</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE value_t gcd(value_t a, value_t b)</div><div class="ttdef"><b>Definition:</b> fast_math.h:115</div></div>
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<div class="ttc" id="structcutlass_1_1divide__assert_html"><div class="ttname"><a href="structcutlass_1_1divide__assert.html">cutlass::divide_assert</a></div><div class="ttdef"><b>Definition:</b> fast_math.h:93</div></div>
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<div class="ttc" id="structcutlass_1_1log2__up_html"><div class="ttname"><a href="structcutlass_1_1log2__up.html">cutlass::log2_up</a></div><div class="ttdef"><b>Definition:</b> fast_math.h:69</div></div>
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<div class="ttc" id="namespacecutlass_html_a6bc666acc9f0d7278a788975e226e005"><div class="ttname"><a href="namespacecutlass.html#a6bc666acc9f0d7278a788975e226e005">cutlass::clz</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE value_t clz(value_t x)</div><div class="ttdef"><b>Definition:</b> fast_math.h:140</div></div>
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<div class="ttc" id="structcutlass_1_1is__pow2_html"><div class="ttname"><a href="structcutlass_1_1is__pow2.html">cutlass::is_pow2</a></div><div class="ttdef"><b>Definition:</b> fast_math.h:46</div></div>
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<div class="ttc" id="namespacecutlass_html_a1676e17a7fea0ac40d9d239cbd3ce872"><div class="ttname"><a href="namespacecutlass.html#a1676e17a7fea0ac40d9d239cbd3ce872">cutlass::const_min</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE constexpr int const_min(int a, int b)</div><div class="ttdef"><b>Definition:</b> fast_math.h:219</div></div>
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<div class="ttc" id="cutlass_8h_html"><div class="ttname"><a href="cutlass_8h.html">cutlass.h</a></div><div class="ttdoc">Basic include for CUTLASS. </div></div>
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<div class="ttc" id="structcutlass_1_1sqrt__est_html"><div class="ttname"><a href="structcutlass_1_1sqrt__est.html">cutlass::sqrt_est</a></div><div class="ttdef"><b>Definition:</b> fast_math.h:84</div></div>
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