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Remove SSE4 path from Vec4<int>::operator*

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This commit is contained in:
fp64 2023-06-30 22:07:26 -04:00
parent f133739cd0
commit cd9f01c4df
2 changed files with 11 additions and 13 deletions
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22
GPU/Math3D.h
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@ -1387,20 +1387,18 @@ template<>
inline Vec4<int> Vec4<int>::operator * (const Vec4 &other) const {
__m128i a = SAFE_M128I(ivec);
__m128i b = SAFE_M128I(other.ivec);
#if _M_SSE >= 0x401
return Vec4<int>(_mm_mullo_epi32(a, b));
#else
// This is what clang does. Seems about as good
// as it gets.
// Intel in its immense wisdom decided that
// SSE2 does not get _mm_mullo_epi32(),
// so we do it this way. This is what clang does,
// which seems about as good as it gets.
__m128i m02 = _mm_mul_epu32(a, b);
__m128i m13 = _mm_mul_epu32( // 0xF5 -> [1, 1, 3, 3]
_mm_shuffle_epi32(a, 0xF5),
_mm_shuffle_epi32(b, 0xF5));
__m128i ret = _mm_unpacklo_epi32( // 0xE8 -> [0, 2, 2, 3]
_mm_shuffle_epi32(m02, 0xE8),
_mm_shuffle_epi32(m13, 0xE8));
__m128i m13 = _mm_mul_epu32(
_mm_shuffle_epi32(a, _MM_SHUFFLE(3, 3, 1, 1)),
_mm_shuffle_epi32(b, _MM_SHUFFLE(3, 3, 1, 1)));
__m128i ret = _mm_unpacklo_epi32(
_mm_shuffle_epi32(m02, _MM_SHUFFLE(3, 2, 2, 0)),
_mm_shuffle_epi32(m13, _MM_SHUFFLE(3, 2, 2, 0)));
return Vec4<int>(ret);
#endif
}
template<> template<>

2
GPU/Software/Sampler.cpp
View File

@ -748,7 +748,7 @@ static Vec4IntResult SOFTRAST_CALL SampleLinearLevel(float s, float t, const u8
Vec4<int> texcolor_br = Vec4<int>::FromRGBA(c.v[3]);
Vec4<int> top = texcolor_tl * (0x10 - frac_u) + texcolor_tr * frac_u;
Vec4<int> bot = texcolor_bl * (0x10 - frac_u) + texcolor_br * frac_u;
return ToVec4IntResult((top * (0x10 - frac_v) + bot * frac_v) >> 8);
return ToVec4IntResult((top * (0x10 - frac_v) + bot * frac_v) >> (4 + 4));
#endif
}