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Interpreter: software-based flush-to-zero

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bDAZ is now called bFlushToZero to better reflect what it's actually
used for.

I decided not to support any hardware-based flush-to-zero on systems
that don't support this for both inputs _and_ outputs. It makes the code
cleaner and the intersection of CPUs that support SSE2 but not DAZ
should be very small.
This commit is contained in:
Tillmann Karras
2013-10-24 22:05:53 +02:00
parent 466a7afde3
commit cd069fdce1
5 changed files with 26 additions and 22 deletions
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4
Source/Core/Common/Src/MathUtil.h
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@ -64,10 +64,10 @@ inline float FlushToZero(float f)
return x.f;
}
inline double FlushToZeroAsFloat(double d)
inline double FlushToZero(double d)
{
IntDouble x; x.d = d;
if ((x.i & DOUBLE_EXP) < 0x3800000000000000ULL)
if ((x.i & DOUBLE_EXP) == 0)
x.i &= DOUBLE_SIGN; // turn into signed zero
return x.d;
}