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Merge pull request #2944 from huwpascoe/perf-3 

Optimized Float<M,E> multiplication
This commit is contained in:
Weiyi Wang 2017-09-25 03:37:14 +03:00 committed by GitHub
parent 93930a966f 903906da3b
commit a81536f53f
1 changed files with 7 additions and 11 deletions
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18
src/video_core/pica_types.h
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@ -58,11 +58,12 @@ public:
}
Float<M, E> operator*(const Float<M, E>& flt) const {
if ((this->value == 0.f && !std::isnan(flt.value)) ||
(flt.value == 0.f && !std::isnan(this->value)))
// PICA gives 0 instead of NaN when multiplying by inf
return Zero();
return Float<M, E>::FromFloat32(ToFloat32() * flt.ToFloat32());
float result = value * flt.ToFloat32();
// PICA gives 0 instead of NaN when multiplying by inf
if (!std::isnan(value) && !std::isnan(flt.ToFloat32()))
if (std::isnan(result))
result = 0.f;
return Float<M, E>::FromFloat32(result);
}
Float<M, E> operator/(const Float<M, E>& flt) const {
@ -78,12 +79,7 @@ public:
}
Float<M, E>& operator*=(const Float<M, E>& flt) {
if ((this->value == 0.f && !std::isnan(flt.value)) ||
(flt.value == 0.f && !std::isnan(this->value)))
// PICA gives 0 instead of NaN when multiplying by inf
*this = Zero();
else
value *= flt.ToFloat32();
value = operator*(flt).value;
return *this;
}