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- m_fixed.h: Define MulScaleF() for floating point multiplying and scaling.

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Mitchell Richters 2021-01-01 19:29:26 +11:00
parent 449714667b
commit 24e09055ca
1 changed files with 1 additions and 0 deletions
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source/common/utility/m_fixed.h
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@ -7,6 +7,7 @@
__forceinline constexpr int32_t MulScale(int32_t a, int32_t b, int32_t shift) { return (int32_t)(((int64_t)a * b) >> shift); }
__forceinline constexpr int32_t MulScaleF(double a, double b, int32_t shift) { return (a * b) * (1. / (uint32_t(1) << shift)); }
__forceinline constexpr int32_t DMulScale(int32_t a, int32_t b, int32_t c, int32_t d, int32_t shift) { return (int32_t)(((int64_t)a * b + (int64_t)c * d) >> shift); }
__forceinline constexpr int32_t DivScale(int32_t a, int32_t b, int shift) { return (int32_t)(((int64_t)a << shift) / b); }