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PixelShaderGen: replace multiplication with shift 

iirc both nvidia and i965 doesn't optimize this
This commit is contained in:
Markus Wick 2014-10-14 12:34:37 +02:00
parent a64b0bf499
commit 1227bd2ba6
1 changed files with 1 additions and 1 deletions
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2
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -894,7 +894,7 @@ static inline void WriteTevRegular(T& out, const char* components, int bias, int
// - a rounding bias is added before dividing by 256
out.Write("(((tevin_d.%s%s)%s)", components, tevBiasTable[bias], tevScaleTableLeft[shift]);
out.Write(" %s ", tevOpTable[op]);
out.Write("((((tevin_a.%s*256 + (tevin_b.%s-tevin_a.%s)*(tevin_c.%s+(tevin_c.%s>>7)))%s)%s)>>8)",
out.Write("(((((tevin_a.%s<<8) + (tevin_b.%s-tevin_a.%s)*(tevin_c.%s+(tevin_c.%s>>7)))%s)%s)>>8)",
components, components, components, components, components,
tevScaleTableLeft[shift], tevLerpBias[2*op+(shift!=3)]);
out.Write(")%s", tevScaleTableRight[shift]);