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<div class="title">intrinsic_exponential.hpp</div> </div>
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<div class="contents">
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<a href="a00045.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="l00002"></a><span class="lineno"> 2</span> </div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#ifndef glm_detail_intrinsic_exponential</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"></span><span class="preprocessor">#define glm_detail_intrinsic_exponential</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include "<a class="code" href="a00084.html" title="OpenGL Mathematics (glm.g-truc.net)">setup.hpp</a>"</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#if(!(GLM_ARCH & GLM_ARCH_SSE2))</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"></span><span class="preprocessor"># error "SSE2 instructions not supported or enabled"</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"></span><span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">namespace </span>glm{</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">namespace </span>detail</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> {</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</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="l00043"></a><span class="lineno"> 43</span> <span class="comment">{</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> __m128 recip = _mm_rsqrt_ss( x ); // "estimate" opcode</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</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="l00046"></a><span class="lineno"> 46</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="l00047"></a><span class="lineno"> 47</span> <span class="comment"> __m128 halfrecip = _mm_mul_ss( half, recip );</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</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="l00049"></a><span class="lineno"> 49</span> <span class="comment"> return _mm_mul_ss( halfrecip, threeminus_xrr );</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"> </span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</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="l00053"></a><span class="lineno"> 53</span> <span class="comment">{</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> __m128 x = _mm_load_ss(&vIn[0]);</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> __m128 y = _mm_load_ss(&vIn[1]);</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> __m128 z = _mm_load_ss(&vIn[2]);</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> </span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</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="l00059"></a><span class="lineno"> 59</span> <span class="comment"> _mm_add_ss(</span></div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> _mm_add_ss( _mm_mul_ss(x,x),</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> _mm_mul_ss(y,y)</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> ),</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> _mm_mul_ss( z, z )</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"> </span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> const __m128 rsqt = _mm_rsqrt_nr_ss( l );</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[0] , _mm_mul_ss( rsqt, x ) );</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[1] , _mm_mul_ss( rsqt, y ) );</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</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="l00071"></a><span class="lineno"> 71</span> <span class="comment"> </span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> return _mm_mul_ss( l , rsqt );</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">*/</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> }<span class="comment">//namespace detail</span></div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }<span class="comment">//namespace glm</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#endif//GLM_ARCH</span></div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor"></span><span class="preprocessor">#endif//glm_detail_intrinsic_exponential</span></div>
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