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Optimized dot SIMD implementation with SSE3

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This commit is contained in:
Christophe Riccio 2016-05-28 02:46:06 +02:00
parent 9c6de96669
commit 1381a95938
3 changed files with 22 additions and 33 deletions
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5
glm/detail/func_geometric_simd.inl
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@ -9,10 +9,7 @@ namespace detail
GLM_FUNC_QUALIFIER static float call(tvec4<float, P> const& x, tvec4<float, P> const& y)
{
__m128 const dot0 = glm_dot_ss(x.data, y.data);
float Result = 0;
_mm_store_ss(&Result, dot0);
return Result;
return _mm_cvtss_f32(dot0);
}
};
}//namespace detail

24
glm/simd/common.h
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@ -3,26 +3,6 @@
#pragma once
#if(GLM_COMPILER & GLM_COMPILER_VC)
#pragma warning(push)
#pragma warning(disable : 4510 4512 4610)
#endif
union ieee754_QNAN
{
const float f;
struct i
{
const unsigned int mantissa:23, exp:8, sign:1;
};
ieee754_QNAN() : f(0.0)/*, mantissa(0x7FFFFF), exp(0xFF), sign(0x0)*/ {}
};
#if(GLM_COMPILER & GLM_COMPILER_VC)
#pragma warning(pop)
#endif
static const __m128 GLM_VAR_USED glm_zero = _mm_setzero_ps();
static const __m128 GLM_VAR_USED glm_one = _mm_set_ps1(1.0f);
static const __m128 GLM_VAR_USED glm_half = _mm_set_ps1(0.5f);
@ -30,15 +10,13 @@ static const __m128 GLM_VAR_USED glm_minus_one = _mm_set_ps1(-1.0f);
static const __m128 GLM_VAR_USED glm_two = _mm_set_ps1(2.0f);
static const __m128 GLM_VAR_USED glm_three = _mm_set_ps1(3.0f);
static const ieee754_QNAN glm_abs_mask;
static const __m128 GLM_VAR_USED glm_abs4_mask = _mm_set_ps1(glm_abs_mask.f);
static const __m128 GLM_VAR_USED glm_epi32_sign_mask = _mm_castsi128_ps(_mm_set1_epi32(static_cast<int>(0x80000000)));
static const __m128 GLM_VAR_USED glm_ps_2pow23 = _mm_set_ps1(8388608.0f);
static const __m128 GLM_VAR_USED glm_ps_1 = _mm_set_ps1(1.0f);
GLM_FUNC_QUALIFIER __m128 glm_abs_ps(__m128 x)
{
return _mm_and_ps(glm_abs4_mask, x);
return _mm_and_ps(x, _mm_castsi128_ps(_mm_set1_epi32(0x7FFFFFFF)));
}
//sign

26
glm/simd/geometric.h
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@ -9,6 +9,11 @@ GLM_FUNC_QUALIFIER __m128 glm_dot_ps(__m128 v1, __m128 v2)
{
# if GLM_ARCH & GLM_ARCH_AVX
return _mm_dp_ps(v1, v2, 0xff);
# elif GLM_ARCH & GLM_ARCH_SSE3
__m128 const Mul0 = _mm_mul_ps(v1, v2);
__m128 const Hadd0 = _mm_hadd_ps(Mul0, Mul0);
__m128 const Hadd1 = _mm_hadd_ps(Hadd0, Hadd0);
return Hadd1;
# else
__m128 const mul0 = _mm_mul_ps(v1, v2);
__m128 const swp0 = _mm_shuffle_ps(mul0, mul0, _MM_SHUFFLE(2, 3, 0, 1));
@ -21,12 +26,21 @@ GLM_FUNC_QUALIFIER __m128 glm_dot_ps(__m128 v1, __m128 v2)
GLM_FUNC_QUALIFIER __m128 glm_dot_ss(__m128 v1, __m128 v2)
{
__m128 const mul0 = _mm_mul_ps(v1, v2);
__m128 const mov0 = _mm_movehl_ps(mul0, mul0);
__m128 const add0 = _mm_add_ps(mov0, mul0);
__m128 const swp1 = _mm_shuffle_ps(add0, add0, 1);
__m128 const add1 = _mm_add_ss(add0, swp1);
return add1;
# if GLM_ARCH & GLM_ARCH_AVX
return _mm_dp_ps(v1, v2, 0xff);
# elif GLM_ARCH & GLM_ARCH_SSE3
__m128 const Mul0 = _mm_mul_ps(v1, v2);
__m128 const Hadd0 = _mm_hadd_ps(Mul0, Mul0);
__m128 const Hadd1 = _mm_hadd_ps(Hadd0, Hadd0);
return Hadd1;
# else
__m128 const mul0 = _mm_mul_ps(v1, v2);
__m128 const mov0 = _mm_movehl_ps(mul0, mul0);
__m128 const add0 = _mm_add_ps(mov0, mul0);
__m128 const swp1 = _mm_shuffle_ps(add0, add0, 1);
__m128 const add1 = _mm_add_ss(add0, swp1);
return add1;
# endif
}
GLM_FUNC_QUALIFIER __m128 glm_len_ps(__m128 x)