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GPU_2TypeCasting_8h_source.html
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<div class="headertitle"><div class="title">GPU/TypeCasting.h</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// This file is part of Eigen, a lightweight C++ template library</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// for linear algebra.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">//</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// Copyright (C) 2016 Benoit Steiner <benoit.steiner.goog@gmail.com></span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// This Source Code Form is subject to the terms of the Mozilla</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">// Public License v. 2.0. If a copy of the MPL was not distributed</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span> </div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#ifndef EIGEN_TYPE_CASTING_GPU_H</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#define EIGEN_TYPE_CASTING_GPU_H</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include "../../InternalHeaderCheck.h"</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceEigen.html">Eigen</a> {</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">namespace </span>internal {</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#if (defined(EIGEN_HAS_CUDA_FP16) && defined(EIGEN_CUDA_ARCH) && EIGEN_CUDA_ARCH >= 300) || \</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor"> (defined(EIGEN_HAS_HIP_FP16) && defined(EIGEN_HIP_DEVICE_COMPILE))</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="keyword">template</span> <></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="keyword">struct </span>type_casting_traits<<a class="code hl_namespace" href="namespaceEigen.html">Eigen</a>::half, float> {</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">enum</span> {</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> VectorizedCast = 1,</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> SrcCoeffRatio = 1,</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> TgtCoeffRatio = 2</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> };</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>};</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> </div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="keyword">template</span><> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE float4 pcast<half2, float4>(<span class="keyword">const</span> half2& a, <span class="keyword">const</span> half2& b) {</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> float2 r1 = __half22float2(a);</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> float2 r2 = __half22float2(b);</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keywordflow">return</span> make_float4(r1.x, r1.y, r2.x, r2.y);</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span>}</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="keyword">template</span><> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet4h2 pcast<float4, Packet4h2>(<span class="keyword">const</span> float4& a, <span class="keyword">const</span> float4& b) {</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> Packet4h2 r;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> half2* r_alias=<span class="keyword">reinterpret_cast<</span>half2*<span class="keyword">></span>(&r);</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> r_alias[0]=__floats2half2_rn(a.x,a.y);</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> r_alias[1]=__floats2half2_rn(a.z,a.w);</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> r_alias[2]=__floats2half2_rn(b.x,b.y);</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> r_alias[3]=__floats2half2_rn(b.z,b.w);</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">return</span> r;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span>}</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="keyword">template</span> <></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="keyword">struct </span>type_casting_traits<float, <a class="code hl_namespace" href="namespaceEigen.html">Eigen</a>::half> {</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">enum</span> {</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> VectorizedCast = 1,</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> SrcCoeffRatio = 2,</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> TgtCoeffRatio = 1</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> };</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span>};</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> </div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="keyword">template</span><> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE float4 pcast<Packet4h2, float4>(<span class="keyword">const</span> Packet4h2& a) {</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// Simply discard the second half of the input</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> float4 r;</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">const</span> half2* a_alias=<span class="keyword">reinterpret_cast<</span><span class="keyword">const </span>half2*<span class="keyword">></span>(&a);</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> float2 r1 = __half22float2(a_alias[0]);</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> float2 r2 = __half22float2(a_alias[1]);</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> r.x=<span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(r1.x);</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> r.y=<span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(r1.y);</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> r.z=<span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(r2.x);</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> r.w=<span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(r2.y);</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">return</span> r;</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span>}</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> </div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span><span class="keyword">template</span><> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE half2 pcast<float4, half2>(<span class="keyword">const</span> float4& a) {</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// Simply discard the second half of the input</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keywordflow">return</span> __floats2half2_rn(a.x, a.y);</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span>}</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> </div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span>} <span class="comment">// end namespace internal</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span>} <span class="comment">// end namespace Eigen</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> </div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span><span class="preprocessor">#endif </span><span class="comment">// EIGEN_TYPE_CASTING_GPU_H</span></div>
<div class="ttc" id="anamespaceEigen_html"><div class="ttname"><a href="namespaceEigen.html">Eigen</a></div><div class="ttdoc">Namespace containing all symbols from the Eigen library.</div><div class="ttdef"><b>Definition</b> Core:139</div></div>
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