diff options
Diffstat (limited to 'src/glm/gtx/simd_vec4.inl')
| -rw-r--r-- | src/glm/gtx/simd_vec4.inl | 730 |
1 files changed, 730 insertions, 0 deletions
diff --git a/src/glm/gtx/simd_vec4.inl b/src/glm/gtx/simd_vec4.inl new file mode 100644 index 0000000..2f8397f --- /dev/null +++ b/src/glm/gtx/simd_vec4.inl @@ -0,0 +1,730 @@ +///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2009-05-07
+// Updated : 2009-05-07
+// Licence : This source is under MIT License
+// File : glm/gtx/simd_vec4.inl
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace glm
+{
+ namespace detail
+ {
+ template <int Value>
+ struct mask
+ {
+ enum{value = Value};
+ };
+
+ //////////////////////////////////////
+ // Implicit basic constructors
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD()
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(__m128 const & Data) :
+ Data(Data)
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(fvec4SIMD const & v) :
+ Data(v.Data)
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(tvec4<float> const & v) :
+ Data(_mm_set_ps(v.w, v.z, v.y, v.x))
+ {}
+
+ //////////////////////////////////////
+ // Explicit basic constructors
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(float const & s) :
+ Data(_mm_set1_ps(s))
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(float const & x, float const & y, float const & z, float const & w) :
+ // Data(_mm_setr_ps(x, y, z, w))
+ Data(_mm_set_ps(w, z, y, x))
+ {}
+/*
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(float const v[4]) :
+ Data(_mm_load_ps(v))
+ {}
+*/
+ //////////////////////////////////////
+ // Swizzle constructors
+
+ //fvec4SIMD(ref4<float> const & r);
+
+ //////////////////////////////////////
+ // Convertion vector constructors
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(vec2 const & v, float const & s1, float const & s2) :
+ Data(_mm_set_ps(s2, s1, v.y, v.x))
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(float const & s1, vec2 const & v, float const & s2) :
+ Data(_mm_set_ps(s2, v.y, v.x, s1))
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(float const & s1, float const & s2, vec2 const & v) :
+ Data(_mm_set_ps(v.y, v.x, s2, s1))
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(vec3 const & v, float const & s) :
+ Data(_mm_set_ps(s, v.z, v.y, v.x))
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(float const & s, vec3 const & v) :
+ Data(_mm_set_ps(v.z, v.y, v.x, s))
+ {}
+
+ GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(vec2 const & v1, vec2 const & v2) :
+ Data(_mm_set_ps(v2.y, v2.x, v1.y, v1.x))
+ {}
+
+ //GLM_FUNC_QUALIFIER fvec4SIMD::fvec4SIMD(ivec4SIMD const & v) :
+ // Data(_mm_cvtepi32_ps(v.Data))
+ //{}
+
+ //////////////////////////////////////
+ // Unary arithmetic operators
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator=(fvec4SIMD const & v)
+ {
+ this->Data = v.Data;
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator+=(float const & s)
+ {
+ this->Data = _mm_add_ps(Data, _mm_set_ps1(s));
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator+=(fvec4SIMD const & v)
+ {
+ this->Data = _mm_add_ps(this->Data , v.Data);
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator-=(float const & s)
+ {
+ this->Data = _mm_sub_ps(Data, _mm_set_ps1(s));
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator-=(fvec4SIMD const & v)
+ {
+ this->Data = _mm_sub_ps(this->Data , v.Data);
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator*=(float const & s)
+ {
+ this->Data = _mm_mul_ps(this->Data, _mm_set_ps1(s));
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator*=(fvec4SIMD const & v)
+ {
+ this->Data = _mm_mul_ps(this->Data , v.Data);
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator/=(float const & s)
+ {
+ this->Data = _mm_div_ps(Data, _mm_set1_ps(s));
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator/=(fvec4SIMD const & v)
+ {
+ this->Data = _mm_div_ps(this->Data , v.Data);
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator++()
+ {
+ this->Data = _mm_add_ps(this->Data , glm::detail::one);
+ return *this;
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator--()
+ {
+ this->Data = _mm_sub_ps(this->Data, glm::detail::one);
+ return *this;
+ }
+
+ //////////////////////////////////////
+ // Swizzle operators
+
+ template <comp X, comp Y, comp Z, comp W>
+ GLM_FUNC_QUALIFIER fvec4SIMD fvec4SIMD::swizzle() const
+ {
+ __m128 Data = _mm_shuffle_ps(
+ this->Data, this->Data,
+ mask<(W << 6) | (Z << 4) | (Y << 2) | (X << 0)>::value);
+ return fvec4SIMD(Data);
+ }
+
+ template <comp X, comp Y, comp Z, comp W>
+ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::swizzle()
+ {
+ this->Data = _mm_shuffle_ps(
+ this->Data, this->Data,
+ mask<(W << 6) | (Z << 4) | (Y << 2) | (X << 0)>::value);
+ return *this;
+ }
+
+ // operator+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator+ (fvec4SIMD const & v, float s)
+ {
+ return fvec4SIMD(_mm_add_ps(v.Data, _mm_set1_ps(s)));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator+ (float s, fvec4SIMD const & v)
+ {
+ return fvec4SIMD(_mm_add_ps(_mm_set1_ps(s), v.Data));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator+ (fvec4SIMD const & v1, fvec4SIMD const & v2)
+ {
+ return fvec4SIMD(_mm_add_ps(v1.Data, v2.Data));
+ }
+
+ //operator-
+ GLM_FUNC_QUALIFIER fvec4SIMD operator- (fvec4SIMD const & v, float s)
+ {
+ return fvec4SIMD(_mm_sub_ps(v.Data, _mm_set1_ps(s)));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator- (float s, fvec4SIMD const & v)
+ {
+ return fvec4SIMD(_mm_sub_ps(_mm_set1_ps(s), v.Data));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator- (fvec4SIMD const & v1, fvec4SIMD const & v2)
+ {
+ return fvec4SIMD(_mm_sub_ps(v1.Data, v2.Data));
+ }
+
+ //operator*
+ GLM_FUNC_QUALIFIER fvec4SIMD operator* (fvec4SIMD const & v, float s)
+ {
+ __m128 par0 = v.Data;
+ __m128 par1 = _mm_set1_ps(s);
+ return fvec4SIMD(_mm_mul_ps(par0, par1));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator* (float s, fvec4SIMD const & v)
+ {
+ __m128 par0 = _mm_set1_ps(s);
+ __m128 par1 = v.Data;
+ return fvec4SIMD(_mm_mul_ps(par0, par1));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator* (fvec4SIMD const & v1, fvec4SIMD const & v2)
+ {
+ return fvec4SIMD(_mm_mul_ps(v1.Data, v2.Data));
+ }
+
+ //operator/
+ GLM_FUNC_QUALIFIER fvec4SIMD operator/ (fvec4SIMD const & v, float s)
+ {
+ __m128 par0 = v.Data;
+ __m128 par1 = _mm_set1_ps(s);
+ return fvec4SIMD(_mm_div_ps(par0, par1));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator/ (float s, fvec4SIMD const & v)
+ {
+ __m128 par0 = _mm_set1_ps(s);
+ __m128 par1 = v.Data;
+ return fvec4SIMD(_mm_div_ps(par0, par1));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator/ (fvec4SIMD const & v1, fvec4SIMD const & v2)
+ {
+ return fvec4SIMD(_mm_div_ps(v1.Data, v2.Data));
+ }
+
+ // Unary constant operators
+ GLM_FUNC_QUALIFIER fvec4SIMD operator- (fvec4SIMD const & v)
+ {
+ return fvec4SIMD(_mm_sub_ps(_mm_setzero_ps(), v.Data));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator++ (fvec4SIMD const & v, int)
+ {
+ return fvec4SIMD(_mm_add_ps(v.Data, glm::detail::one));
+ }
+
+ GLM_FUNC_QUALIFIER fvec4SIMD operator-- (fvec4SIMD const & v, int)
+ {
+ return fvec4SIMD(_mm_sub_ps(v.Data, glm::detail::one));
+ }
+
+ }//namespace detail
+
+ namespace gtx{
+ namespace simd_vec4
+ {
+ GLM_FUNC_QUALIFIER detail::tvec4<float> vec4_cast
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ GLM_ALIGN(16) detail::tvec4<float> Result;
+ _mm_store_ps(&Result[0], x.Data);
+ return Result;
+ }
+
+ // Other possible implementation
+ //float abs(float a)
+ //{
+ // return max(-a, a);
+ //}
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD abs
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_abs_ps(x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD sign
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_sgn_ps(x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD floor
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_flr_ps(x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD trunc
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ //return x < 0 ? -floor(-x) : floor(x);
+
+ __m128 Flr0 = detail::sse_flr_ps(_mm_sub_ps(_mm_setzero_ps(), x.Data));
+ __m128 Sub0 = _mm_sub_ps(Flr0, x.Data);
+ __m128 Flr1 = detail::sse_flr_ps(x.Data);
+
+ __m128 Cmp0 = _mm_cmplt_ps(x.Data, glm::detail::zero);
+ __m128 Cmp1 = _mm_cmpnlt_ps(x.Data, glm::detail::zero);
+
+ __m128 And0 = _mm_and_ps(Sub0, Cmp0);
+ __m128 And1 = _mm_and_ps(Flr1, Cmp1);
+
+ return _mm_or_ps(And0, And1);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD round
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_rnd_ps(x.Data);
+ }
+
+ //GLM_FUNC_QUALIFIER detail::fvec4SIMD roundEven
+ //(
+ // detail::fvec4SIMD const & x
+ //)
+ //{
+
+ //}
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD ceil
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_ceil_ps(x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD fract
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_frc_ps(x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD mod
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & y
+ )
+ {
+ return detail::sse_mod_ps(x.Data, y.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD mod
+ (
+ detail::fvec4SIMD const & x,
+ float const & y
+ )
+ {
+ return detail::sse_mod_ps(x.Data, _mm_set1_ps(y));
+ }
+
+ //GLM_FUNC_QUALIFIER detail::fvec4SIMD modf
+ //(
+ // detail::fvec4SIMD const & x,
+ // detail::fvec4SIMD & i
+ //)
+ //{
+
+ //}
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD min
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & y
+ )
+ {
+ return _mm_min_ps(x.Data, y.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD min
+ (
+ detail::fvec4SIMD const & x,
+ float const & y
+ )
+ {
+ return _mm_min_ps(x.Data, _mm_set1_ps(y));
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD max
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & y
+ )
+ {
+ return _mm_max_ps(x.Data, y.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD max
+ (
+ detail::fvec4SIMD const & x,
+ float const & y
+ )
+ {
+ return _mm_max_ps(x.Data, _mm_set1_ps(y));
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD clamp
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & minVal,
+ detail::fvec4SIMD const & maxVal
+ )
+ {
+ return detail::sse_clp_ps(x.Data, minVal.Data, maxVal.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD clamp
+ (
+ detail::fvec4SIMD const & x,
+ float const & minVal,
+ float const & maxVal
+ )
+ {
+ return detail::sse_clp_ps(x.Data, _mm_set1_ps(minVal), _mm_set1_ps(maxVal));
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD mix
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & y,
+ detail::fvec4SIMD const & a
+ )
+ {
+ __m128 Sub0 = _mm_sub_ps(y.Data, x.Data);
+ __m128 Mul0 = _mm_mul_ps(a.Data, Sub0);
+ return _mm_mul_ps(x.Data, Mul0);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD step
+ (
+ detail::fvec4SIMD const & edge,
+ detail::fvec4SIMD const & x
+ )
+ {
+ __m128 cmp0 = _mm_cmpngt_ps(x.Data, edge.Data);
+ return _mm_max_ps(_mm_min_ps(cmp0, _mm_setzero_ps()), detail::one);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD step
+ (
+ float const & edge,
+ detail::fvec4SIMD const & x
+ )
+ {
+ __m128 cmp0 = _mm_cmpngt_ps(x.Data, _mm_set1_ps(edge));
+ return _mm_max_ps(_mm_min_ps(cmp0, _mm_setzero_ps()), detail::one);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD smoothstep
+ (
+ detail::fvec4SIMD const & edge0,
+ detail::fvec4SIMD const & edge1,
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_ssp_ps(edge0.Data, edge1.Data, x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD smoothstep
+ (
+ float const & edge0,
+ float const & edge1,
+ detail::fvec4SIMD const & x
+ )
+ {
+ return detail::sse_ssp_ps(_mm_set1_ps(edge0), _mm_set1_ps(edge1), x.Data);
+ }
+
+ //GLM_FUNC_QUALIFIER bvec4 isnan(detail::fvec4SIMD const & x)
+ //{
+
+ //}
+
+ //GLM_FUNC_QUALIFIER bvec4 isinf(detail::fvec4SIMD const & x)
+ //{
+
+ //}
+
+ //GLM_FUNC_QUALIFIER detail::ivec4SIMD floatBitsToInt
+ //(
+ // detail::fvec4SIMD const & value
+ //)
+ //{
+
+ //}
+
+ //GLM_FUNC_QUALIFIER detail::fvec4SIMD intBitsToFloat
+ //(
+ // detail::ivec4SIMD const & value
+ //)
+ //{
+
+ //}
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD fma
+ (
+ detail::fvec4SIMD const & a,
+ detail::fvec4SIMD const & b,
+ detail::fvec4SIMD const & c
+ )
+ {
+ return _mm_add_ps(_mm_mul_ps(a.Data, b.Data), c.Data);
+ }
+
+ GLM_FUNC_QUALIFIER float length
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ detail::fvec4SIMD dot0 = detail::sse_dot_ss(x.Data, x.Data);
+ detail::fvec4SIMD sqt0 = sqrt(dot0);
+ float Result = 0;
+ _mm_store_ss(&Result, sqt0.Data);
+ return Result;
+ }
+
+ GLM_FUNC_QUALIFIER float fastLength
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ detail::fvec4SIMD dot0 = detail::sse_dot_ss(x.Data, x.Data);
+ detail::fvec4SIMD sqt0 = fastSqrt(dot0);
+ float Result = 0;
+ _mm_store_ss(&Result, sqt0.Data);
+ return Result;
+ }
+
+ GLM_FUNC_QUALIFIER float niceLength
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ detail::fvec4SIMD dot0 = detail::sse_dot_ss(x.Data, x.Data);
+ detail::fvec4SIMD sqt0 = niceSqrt(dot0);
+ float Result = 0;
+ _mm_store_ss(&Result, sqt0.Data);
+ return Result;
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD length4
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return sqrt(dot4(x, x));
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD fastLength4
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return fastSqrt(dot4(x, x));
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD niceLength4
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ return niceSqrt(dot4(x, x));
+ }
+
+ GLM_FUNC_QUALIFIER float distance
+ (
+ detail::fvec4SIMD const & p0,
+ detail::fvec4SIMD const & p1
+ )
+ {
+ float Result = 0;
+ _mm_store_ss(&Result, detail::sse_dst_ps(p0.Data, p1.Data));
+ return Result;
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD distance4
+ (
+ detail::fvec4SIMD const & p0,
+ detail::fvec4SIMD const & p1
+ )
+ {
+ return detail::sse_dst_ps(p0.Data, p1.Data);
+ }
+
+ GLM_FUNC_QUALIFIER float dot
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & y
+ )
+ {
+ float Result = 0;
+ _mm_store_ss(&Result, detail::sse_dot_ss(x.Data, y.Data));
+ return Result;
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD dot4
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & y
+ )
+ {
+ return detail::sse_dot_ps(x.Data, y.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD cross
+ (
+ detail::fvec4SIMD const & x,
+ detail::fvec4SIMD const & y
+ )
+ {
+ return detail::sse_xpd_ps(x.Data, y.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD normalize
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ __m128 dot0 = detail::sse_dot_ps(x.Data, x.Data);
+ __m128 isr0 = inversesqrt(dot0).Data;
+ __m128 mul0 = _mm_mul_ps(x.Data, isr0);
+ return mul0;
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD fastNormalize
+ (
+ detail::fvec4SIMD const & x
+ )
+ {
+ __m128 dot0 = detail::sse_dot_ps(x.Data, x.Data);
+ __m128 isr0 = fastInversesqrt(dot0).Data;
+ __m128 mul0 = _mm_mul_ps(x.Data, isr0);
+ return mul0;
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD faceforward
+ (
+ detail::fvec4SIMD const & N,
+ detail::fvec4SIMD const & I,
+ detail::fvec4SIMD const & Nref
+ )
+ {
+ return detail::sse_ffd_ps(N.Data, I.Data, Nref.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD reflect
+ (
+ detail::fvec4SIMD const & I,
+ detail::fvec4SIMD const & N
+ )
+ {
+ return detail::sse_rfe_ps(I.Data, N.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD refract
+ (
+ detail::fvec4SIMD const & I,
+ detail::fvec4SIMD const & N,
+ float const & eta
+ )
+ {
+ return detail::sse_rfa_ps(I.Data, N.Data, _mm_set1_ps(eta));
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD sqrt(detail::fvec4SIMD const & x)
+ {
+ return _mm_mul_ps(inversesqrt(x.Data).Data, x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD niceSqrt(detail::fvec4SIMD const & x)
+ {
+ return _mm_sqrt_ps(x.Data);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD fastSqrt(detail::fvec4SIMD const & x)
+ {
+ return _mm_mul_ps(fastInversesqrt(x.Data).Data, x.Data);
+ }
+
+ // SSE scalar reciprocal sqrt using rsqrt op, plus one Newton-Rhaphson iteration
+ // By Elan Ruskin, http://assemblyrequired.crashworks.org/
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD inversesqrt(detail::fvec4SIMD const & x)
+ {
+ GLM_ALIGN(4) static const __m128 three = {3, 3, 3, 3}; // aligned consts for fast load
+ GLM_ALIGN(4) static const __m128 half = {0.5,0.5,0.5,0.5};
+
+ __m128 recip = _mm_rsqrt_ps(x.Data); // "estimate" opcode
+ __m128 halfrecip = _mm_mul_ps(half, recip);
+ __m128 threeminus_xrr = _mm_sub_ps(three, _mm_mul_ps(x.Data, _mm_mul_ps(recip, recip)));
+ return _mm_mul_ps(halfrecip, threeminus_xrr);
+ }
+
+ GLM_FUNC_QUALIFIER detail::fvec4SIMD fastInversesqrt(detail::fvec4SIMD const & x)
+ {
+ return _mm_rsqrt_ps(x.Data);
+ }
+
+ }//namespace simd_vec4
+ }//namespace gtx
+}//namespace glm
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