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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>
This commit is contained in:
Christophe Lyon 2011-02-21 17:38:45 +01:00 committed by Aurelien Jarno
parent 8559666ddb
commit c30fe7dfc4
1 changed files with 15 additions and 0 deletions
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15
fpu/softfloat.h
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@ -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.