1 files changed, 60 insertions, 0 deletions
diff --git a/src/glm/core/intrinsic_exponential.hpp b/src/glm/core/intrinsic_exponential.hpp
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+++ b/src/glm/core/intrinsic_exponential.hpp
@@ -0,0 +1,60 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2009-05-11
+// Updated : 2009-05-11
+// Licence : This source is under MIT License
+// File    : glm/core/intrinsic_exponential.hpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_detail_intrinsic_exponential
+#define glm_detail_intrinsic_exponential
+
+#include "setup.hpp"
+
+#if((GLM_ARCH & GLM_ARCH_SSE2) != GLM_ARCH_SSE2)
+#	error "SSE2 instructions not supported or enabled"
+#else
+
+namespace glm{
+namespace detail
+{
+/*
+GLM_FUNC_QUALIFIER __m128 sse_rsqrt_nr_ss(__m128 const x)
+{
+	__m128 recip = _mm_rsqrt_ss( x );  // "estimate" opcode
+	const static __m128 three = { 3, 3, 3, 3 }; // aligned consts for fast load
+	const static __m128 half = { 0.5,0.5,0.5,0.5 };
+	__m128 halfrecip = _mm_mul_ss( half, recip );
+	__m128 threeminus_xrr = _mm_sub_ss( three, _mm_mul_ss( x, _mm_mul_ss ( recip, recip ) ) );
+	return _mm_mul_ss( halfrecip, threeminus_xrr );
+}
+ 
+GLM_FUNC_QUALIFIER __m128 sse_normalize_fast_ps(  float * RESTRICT vOut, float * RESTRICT vIn )
+{
+        __m128 x = _mm_load_ss(&vIn[0]);
+        __m128 y = _mm_load_ss(&vIn[1]);
+        __m128 z = _mm_load_ss(&vIn[2]);
+ 
+        const __m128 l =  // compute x*x + y*y + z*z
+                _mm_add_ss(
+                 _mm_add_ss( _mm_mul_ss(x,x),
+                             _mm_mul_ss(y,y)
+                            ),
+                 _mm_mul_ss( z, z )
+                );
+ 
+ 
+        const __m128 rsqt = _mm_rsqrt_nr_ss( l );
+        _mm_store_ss( &vOut[0] , _mm_mul_ss( rsqt, x ) );
+        _mm_store_ss( &vOut[1] , _mm_mul_ss( rsqt, y ) );
+        _mm_store_ss( &vOut[2] , _mm_mul_ss( rsqt, z ) );
+ 
+        return _mm_mul_ss( l , rsqt );
+}
+*/
+}//namespace detail
+}//namespace glm
+
+#endif//GLM_ARCH
+#endif//glm_detail_intrinsic_exponential