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softfloat: add float{x80,128}_maybe_silence_nan() 

Add float{x80,128}_maybe_silence_nan() functions, they will be need by
propagateFloat{x80,128}NaN().

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2011-01-06 15:38:19 +01:00
parent 93ae1c6fea
commit f6a7d92aed
2 changed files with 48 additions and 0 deletions
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46
fpu/softfloat-specialize.h
View File

@ -479,6 +479,29 @@ int floatx80_is_signaling_nan( floatx80 a )
#endif
}
/*----------------------------------------------------------------------------
| Returns a quiet NaN if the extended double-precision floating point value
| `a' is a signaling NaN; otherwise returns `a'.
*----------------------------------------------------------------------------*/
floatx80 floatx80_maybe_silence_nan( floatx80 a )
{
if (floatx80_is_signaling_nan(a)) {
#if SNAN_BIT_IS_ONE
# if defined(TARGET_MIPS)
a.low = floatx80_default_nan_low;
a.high = floatx80_default_nan_high;
# else
# error Rules for silencing a signaling NaN are target-specific
# endif
#else
a.low |= LIT64( 0xC000000000000000 );
return a;
#endif
}
return a;
}
/*----------------------------------------------------------------------------
| Returns the result of converting the extended double-precision floating-
| point NaN `a' to the canonical NaN format. If `a' is a signaling NaN, the
@ -611,6 +634,29 @@ int float128_is_signaling_nan( float128 a )
#endif
}
/*----------------------------------------------------------------------------
| Returns a quiet NaN if the quadruple-precision floating point value `a' is
| a signaling NaN; otherwise returns `a'.
*----------------------------------------------------------------------------*/
float128 float128_maybe_silence_nan( float128 a )
{
if (float128_is_signaling_nan(a)) {
#if SNAN_BIT_IS_ONE
# if defined(TARGET_MIPS)
a.low = float128_default_nan_low;
a.high = float128_default_nan_high;
# else
# error Rules for silencing a signaling NaN are target-specific
# endif
#else
a.high |= LIT64( 0x0000800000000000 );
return a;
#endif
}
return a;
}
/*----------------------------------------------------------------------------
| Returns the result of converting the quadruple-precision floating-point NaN
| `a' to the canonical NaN format. If `a' is a signaling NaN, the invalid

2
fpu/softfloat.h
View File

@ -439,6 +439,7 @@ int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
int floatx80_is_quiet_nan( floatx80 );
int floatx80_is_signaling_nan( floatx80 );
floatx80 floatx80_maybe_silence_nan( floatx80 );
floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
INLINE floatx80 floatx80_abs(floatx80 a)
@ -505,6 +506,7 @@ int float128_compare( float128, float128 STATUS_PARAM );
int float128_compare_quiet( float128, float128 STATUS_PARAM );
int float128_is_quiet_nan( float128 );
int float128_is_signaling_nan( float128 );
float128 float128_maybe_silence_nan( float128 );
float128 float128_scalbn( float128, int STATUS_PARAM );
INLINE float128 float128_abs(float128 a)