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softfloat: add float{32,64}_is_{de,}normal 

This paves the way for upcoming work.

Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
master
Emilio G. Cota 2018-03-16 17:58:56 -04:00 committed by Alex Bennée
parent 6c49b06dfd
commit 588e6dfd87
1 changed files with 20 additions and 0 deletions
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20
include/fpu/softfloat.h
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@ -464,6 +464,16 @@ static inline int float32_is_zero_or_denormal(float32 a)
return (float32_val(a) & 0x7f800000) == 0;
}
static inline bool float32_is_normal(float32 a)
{
return ((float32_val(a) + 0x00800000) & 0x7fffffff) >= 0x01000000;
}
static inline bool float32_is_denormal(float32 a)
{
return float32_is_zero_or_denormal(a) && !float32_is_zero(a);
}
static inline float32 float32_set_sign(float32 a, int sign)
{
return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
@ -605,6 +615,16 @@ static inline int float64_is_zero_or_denormal(float64 a)
return (float64_val(a) & 0x7ff0000000000000LL) == 0;
}
static inline bool float64_is_normal(float64 a)
{
return ((float64_val(a) + (1ULL << 52)) & -1ULL >> 1) >= 1ULL << 53;
}
static inline bool float64_is_denormal(float64 a)
{
return float64_is_zero_or_denormal(a) && !float64_is_zero(a);
}
static inline float64 float64_set_sign(float64 a, int sign)
{
return make_float64((float64_val(a) & 0x7fffffffffffffffULL)