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MathUtil: add constructors to IntFloat/IntDouble

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This commit is contained in:
Tillmann Karras
2014-03-23 10:24:06 +01:00
parent 9849129b5d
commit af525266d4
2 changed files with 14 additions and 10 deletions
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18
Source/Core/Common/MathUtil.h
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@ -36,35 +36,41 @@ static const u32 FLOAT_SIGN = 0x80000000,
union IntDouble {
double d;
u64 i;
explicit IntDouble(u64 _i) : i(_i) {}
explicit IntDouble(double _d) : d(_d) {}
};
union IntFloat {
float f;
u32 i;
explicit IntFloat(u32 _i) : i(_i) {}
explicit IntFloat(float _f) : f(_f) {}
};
inline bool IsINF(double d)
{
IntDouble x; x.d = d;
IntDouble x(d);
return (x.i & ~DOUBLE_SIGN) == DOUBLE_EXP;
}
inline bool IsNAN(double d)
{
IntDouble x; x.d = d;
IntDouble x(d);
return ((x.i & DOUBLE_EXP) == DOUBLE_EXP) &&
((x.i & DOUBLE_FRAC) != DOUBLE_ZERO);
}
inline bool IsQNAN(double d)
{
IntDouble x; x.d = d;
IntDouble x(d);
return ((x.i & DOUBLE_EXP) == DOUBLE_EXP) &&
((x.i & DOUBLE_QBIT) == DOUBLE_QBIT);
}
inline bool IsSNAN(double d)
{
IntDouble x; x.d = d;
IntDouble x(d);
return ((x.i & DOUBLE_EXP) == DOUBLE_EXP) &&
((x.i & DOUBLE_FRAC) != DOUBLE_ZERO) &&
((x.i & DOUBLE_QBIT) == DOUBLE_ZERO);
@ -72,7 +78,7 @@ inline bool IsSNAN(double d)
inline float FlushToZero(float f)
{
IntFloat x; x.f = f;
IntFloat x(f);
if ((x.i & FLOAT_EXP) == 0)
{
x.i &= FLOAT_SIGN; // turn into signed zero
@ -82,7 +88,7 @@ inline float FlushToZero(float f)
inline double FlushToZero(double d)
{
IntDouble x; x.d = d;
IntDouble x(d);
if ((x.i & DOUBLE_EXP) == 0)
{
x.i &= DOUBLE_SIGN; // turn into signed zero