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This allows building against the same version of GLM across all targets and not deal with API changes of newer GLM versions which introduce regressions. Long term we want to migrate away from GLM and stick to a minimal self-written subset.
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<div id="projectname">0.9.7
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<li class="navelem"><a class="el" href="dir_275089585c7fc1b5fd5d7d42c69cb1da.html">D:</a></li><li class="navelem"><a class="el" href="dir_7b98f88bffbed4b390b5f8f520d9c08e.html">Source</a></li><li class="navelem"><a class="el" href="dir_1f76e953200861345293ade84ac7fb6c.html">G-Truc</a></li><li class="navelem"><a class="el" href="dir_e29b03b892e0e25920d021a614d4db9b.html">glm</a></li><li class="navelem"><a class="el" href="dir_5ce58d942b2d0776e17a9a58abc01e04.html">glm</a></li><li class="navelem"><a class="el" href="dir_e529a619cfdec1fa4c331fb042fd332f.html">detail</a></li> </ul>
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<div class="title">intrinsic_exponential.hpp</div> </div>
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<a href="a00049.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#pragma once</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "<a class="code" href="a00105.html">setup.hpp</a>"</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#if(!(GLM_ARCH & GLM_ARCH_SSE2))</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"># error "SSE2 instructions not supported or enabled"</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">namespace </span><a class="code" href="a00146.html">glm</a>{</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">namespace </span>detail</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> {</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">GLM_FUNC_QUALIFIER __m128 sse_rsqrt_nr_ss(__m128 const x)</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">{</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> __m128 recip = _mm_rsqrt_ss( x ); // "estimate" opcode</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> const static __m128 three = { 3, 3, 3, 3 }; // aligned consts for fast load</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> const static __m128 half = { 0.5,0.5,0.5,0.5 };</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> __m128 halfrecip = _mm_mul_ss( half, recip );</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> __m128 threeminus_xrr = _mm_sub_ss( three, _mm_mul_ss( x, _mm_mul_ss ( recip, recip ) ) );</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> return _mm_mul_ss( halfrecip, threeminus_xrr );</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">}</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> </span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">GLM_FUNC_QUALIFIER __m128 sse_normalize_fast_ps( float * RESTRICT vOut, float * RESTRICT vIn )</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">{</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> __m128 x = _mm_load_ss(&vIn[0]);</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> __m128 y = _mm_load_ss(&vIn[1]);</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> __m128 z = _mm_load_ss(&vIn[2]);</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> </span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> const __m128 l = // compute x*x + y*y + z*z</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> _mm_add_ss(</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> _mm_add_ss( _mm_mul_ss(x,x),</span></div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> _mm_mul_ss(y,y)</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> ),</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> _mm_mul_ss( z, z )</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> );</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> </span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> </span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> const __m128 rsqt = _mm_rsqrt_nr_ss( l );</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> _mm_store_ss( &vOut[0] , _mm_mul_ss( rsqt, x ) );</span></div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> _mm_store_ss( &vOut[1] , _mm_mul_ss( rsqt, y ) );</span></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> _mm_store_ss( &vOut[2] , _mm_mul_ss( rsqt, z ) );</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> </span></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> return _mm_mul_ss( l , rsqt );</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">}</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }<span class="comment">//namespace detail</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> }<span class="comment">//namespace glm</span></div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#endif//GLM_ARCH</span></div>
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<div class="ttc" id="a00146_html"><div class="ttname"><a href="a00146.html">glm</a></div><div class="ttdef"><b>Definition:</b> <a href="a00003_source.html#l00040">_noise.hpp:40</a></div></div>
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<div class="ttc" id="a00105_html"><div class="ttname"><a href="a00105.html">setup.hpp</a></div><div class="ttdoc">OpenGL Mathematics (glm.g-truc.net) </div></div>
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