thirdparty/ppsspp
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SoftGPU: Avoid rcp due to precision issues.

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Causes artifacts in Sword Art Online, which draws a dialog box using
stretched UVs - rcp causes the edges to sample outside the original UVs.
This commit is contained in:
Unknown W. Brackets 2017-05-14 07:40:38 -07:00
parent d13fdfbf37
commit 8ee92048c0
1 changed files with 2 additions and 1 deletions
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3
GPU/Software/Rasterizer.cpp
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@ -1319,7 +1319,8 @@ static inline bool AnyMask(const Vec4<int> &mask) {
static inline Vec4<float> EdgeRecip(const Vec4<int> &w0, const Vec4<int> &w1, const Vec4<int> &w2) {
#if defined(_M_SSE) && !defined(_M_IX86)
__m128i wsum = _mm_add_epi32(w0.ivec, _mm_add_epi32(w1.ivec, w2.ivec));
return _mm_rcp_ps(_mm_cvtepi32_ps(wsum));
// _mm_rcp_ps loses too much precision.
return _mm_div_ps(_mm_set1_ps(1.0f), _mm_cvtepi32_ps(wsum));
#else
return (w0 + w1 + w2).Cast<float>().Reciprocal();
#endif