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softgpu: Use SSE in Vec?::Length().

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Minor perf boost but if I do everything in Vec things get slower.
This commit is contained in:
Unknown W. Brackets 2014-03-16 17:56:34 -07:00
parent 6ef0aa123f
commit 47728528d7
1 changed files with 28 additions and 0 deletions
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28
GPU/Math3D.cpp
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@ -22,7 +22,16 @@ namespace Math3D {
template<>
float Vec2<float>::Length() const
{
#if defined(_M_SSE)
float ret;
__m128 sq = _mm_mul_ps(vec, vec);
const __m128 r2 = _mm_shuffle_ps(sq, sq, _MM_SHUFFLE(0, 0, 0, 1));
const __m128 res = _mm_add_ss(sq, r2);
_mm_store_ps(&ret, _mm_sqrt_ss(res));
return ret;
#else
return sqrtf(Length2());
#endif
}
template<>
@ -88,7 +97,17 @@ unsigned int Vec3<int>::ToRGB() const
template<>
float Vec3<float>::Length() const
{
#if defined(_M_SSE)
float ret;
__m128 sq = _mm_mul_ps(vec, vec);
const __m128 r2 = _mm_shuffle_ps(sq, sq, _MM_SHUFFLE(0, 0, 0, 1));
const __m128 r3 = _mm_shuffle_ps(sq, sq, _MM_SHUFFLE(0, 0, 0, 2));
const __m128 res = _mm_add_ss(sq, _mm_add_ss(r2, r3));
_mm_store_ps(&ret, _mm_sqrt_ss(res));
return ret;
#else
return sqrtf(Length2());
#endif
}
template<>
@ -156,7 +175,16 @@ unsigned int Vec4<int>::ToRGBA() const
template<>
float Vec4<float>::Length() const
{
#if defined(_M_SSE)
float ret;
__m128 sq = _mm_mul_ps(vec, vec);
const __m128 r2 = _mm_add_ps(sq, _mm_movehl_ps(sq, sq));
const __m128 res = _mm_add_ss(r2, _mm_shuffle_ps(r2, r2, _MM_SHUFFLE(0, 0, 0, 1)));
_mm_store_ps(&ret, _mm_sqrt_ss(res));
return ret;
#else
return sqrtf(Length2());
#endif
}
template<>