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fp: add floatXX_is_infinity(), floatXX_is_neg(), floatXX_is_zero()

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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6050 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2008-12-15 17:14:20 +00:00
parent 1b2ad2ec7a
commit c52ab6f585
2 changed files with 105 additions and 0 deletions
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45
fpu/softfloat-native.h
View File

@ -258,6 +258,21 @@ INLINE float32 float32_chs(float32 a)
return -a;
}
INLINE float32 float32_is_infinity(float32 a)
{
return fpclassify(a) == FP_INFINITE;
}
INLINE float32 float32_is_neg(float32 a)
{
return a < 0.0;
}
INLINE float32 float32_is_zero(float32 a)
{
return fpclassify(a) == FP_ZERO;
}
INLINE float32 float32_scalbn(float32 a, int n)
{
return scalbnf(a, n);
@ -350,6 +365,21 @@ INLINE float64 float64_chs(float64 a)
return -a;
}
INLINE float64 float64_is_infinity(float64 a)
{
return fpclassify(a) == FP_INFINITE;
}
INLINE float64 float64_is_neg(float64 a)
{
return a < 0.0;
}
INLINE float64 float64_is_zero(float64 a)
{
return fpclassify(a) == FP_ZERO;
}
INLINE float64 float64_scalbn(float64 a, int n)
{
return scalbn(a, n);
@ -437,6 +467,21 @@ INLINE floatx80 floatx80_chs(floatx80 a)
return -a;
}
INLINE floatx80 floatx80_is_infinity(floatx80 a)
{
return fpclassify(a) == FP_INFINITE;
}
INLINE floatx80 floatx80_is_neg(floatx80 a)
{
return a < 0.0;
}
INLINE floatx80 floatx80_is_zero(floatx80 a)
{
return fpclassify(a) == FP_ZERO;
}
INLINE floatx80 floatx80_scalbn(floatx80 a, int n)
{
return scalbnl(a, n);

60
fpu/softfloat.h
View File

@ -281,6 +281,21 @@ INLINE float32 float32_chs(float32 a)
return make_float32(float32_val(a) ^ 0x80000000);
}
INLINE int float32_is_infinity(float32 a)
{
return (float32_val(a) & 0x7fffffff) == 0x7ff80000;
}
INLINE int float32_is_neg(float32 a)
{
return float32_val(a) >> 31;
}
INLINE int float32_is_zero(float32 a)
{
return (float32_val(a) & 0x7fffffff) == 0;
}
#define float32_zero make_float32(0)
/*----------------------------------------------------------------------------
@ -335,6 +350,21 @@ INLINE float64 float64_chs(float64 a)
return make_float64(float64_val(a) ^ 0x8000000000000000LL);
}
INLINE int float64_is_infinity(float64 a)
{
return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
}
INLINE int float64_is_neg(float64 a)
{
return float64_val(a) >> 63;
}
INLINE int float64_is_zero(float64 a)
{
return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
}
#define float64_zero make_float64(0)
#ifdef FLOATX80
@ -384,6 +414,21 @@ INLINE floatx80 floatx80_chs(floatx80 a)
return a;
}
INLINE int floatx80_is_infinity(floatx80 a)
{
return (a.high & 0x7fff) == 0x7fff && a.low == 0;
}
INLINE int floatx80_is_neg(floatx80 a)
{
return a.high >> 15;
}
INLINE int floatx80_is_zero(floatx80 a)
{
return (a.high & 0x7fff) == 0 && a.low == 0;
}
#endif
#ifdef FLOAT128
@ -435,6 +480,21 @@ INLINE float128 float128_chs(float128 a)
return a;
}
INLINE int float128_is_infinity(float128 a)
{
return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
}
INLINE int float128_is_neg(float128 a)
{
return a.high >> 63;
}
INLINE int float128_is_zero(float128 a)
{
return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
}
#endif
#else /* CONFIG_SOFTFLOAT */