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| author | Christophe Lyon <christophe.lyon@st.com> | 2011-02-21 17:38:45 +0100 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2011-02-24 08:53:36 +0100 |
| commit | c30fe7dfc44cf6ca0213e0c15f92cf00f796721b (patch) | |
| tree | fe2abc022222e6cc224d061c854fa63e2fcc5753 /fpu/softfloat.h | |
| parent | 8559666ddb50a721bee06d281d5fa87ef44749ba (diff) | |
| download | qemu-c30fe7dfc44cf6ca0213e0c15f92cf00f796721b.zip qemu-c30fe7dfc44cf6ca0213e0c15f92cf00f796721b.tar.gz qemu-c30fe7dfc44cf6ca0213e0c15f92cf00f796721b.tar.bz2 | |
softfloat: add _set_sign(), _infinity and _half for 32 and 64 bits floats.
These constants and utility function are needed to implement some
helpers. Defining constants avoids the need to re-compute them at
runtime.
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'fpu/softfloat.h')
| -rw-r--r-- | fpu/softfloat.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fpu/softfloat.h b/fpu/softfloat.h index f34a938..fd61dc4 100644 --- a/fpu/softfloat.h +++ b/fpu/softfloat.h @@ -379,9 +379,16 @@ INLINE int float32_is_zero_or_denormal(float32 a) return (float32_val(a) & 0x7f800000) == 0; } +INLINE float32 float32_set_sign(float32 a, int sign) +{ + return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31)); +} + #define float32_zero make_float32(0) #define float32_one make_float32(0x3f800000) #define float32_ln2 make_float32(0x3f317218) +#define float32_half make_float32(0x3f000000) +#define float32_infinity make_float32(0x7f800000) /*---------------------------------------------------------------------------- @@ -479,9 +486,17 @@ INLINE int float64_is_any_nan(float64 a) return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL); } +INLINE float64 float64_set_sign(float64 a, int sign) +{ + return make_float64((float64_val(a) & 0x7fffffffffffffffULL) + | ((int64_t)sign << 63)); +} + #define float64_zero make_float64(0) #define float64_one make_float64(0x3ff0000000000000LL) #define float64_ln2 make_float64(0x3fe62e42fefa39efLL) +#define float64_half make_float64(0x3fe0000000000000LL) +#define float64_infinity make_float64(0x7ff0000000000000LL) /*---------------------------------------------------------------------------- | The pattern for a default generated double-precision NaN. |