diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2011-01-06 15:38:19 +0100 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2011-01-06 16:29:17 +0100 |
| commit | 93ae1c6fea6433bca732c907d7c3ee9be4f8a2ab (patch) | |
| tree | 863cf98e15ae32df999aad885365c01ef965a712 /fpu | |
| parent | d735d695e7b547272412f63433e023496c4d36ed (diff) | |
softfloat: fix float{32,64}_maybe_silence_nan() for MIPS
On targets that define sNaN with the sNaN bit as one, simply clearing
this bit may correspond to an infinite value.
Convert it to a default NaN if SNAN_BIT_IS_ONE, as it corresponds to
the MIPS implementation, the only emulated CPU with SNAN_BIT_IS_ONE.
When other CPU of this type are added, this might be updated to include
more cases.
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat-specialize.h | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index 33930f99ed..bc6f0c1e5b 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -107,13 +107,17 @@ int float32_is_signaling_nan( float32 a_ ) float32 float32_maybe_silence_nan( float32 a_ ) { if (float32_is_signaling_nan(a_)) { - uint32_t a = float32_val(a_); #if SNAN_BIT_IS_ONE - a &= ~(1 << 22); +# if defined(TARGET_MIPS) + return float32_default_nan; +# else +# error Rules for silencing a signaling NaN are target-specific +# endif #else + bits32 a = float32_val(a_); a |= (1 << 22); -#endif return make_float32(a); +#endif } return a_; } @@ -322,13 +326,17 @@ int float64_is_signaling_nan( float64 a_ ) float64 float64_maybe_silence_nan( float64 a_ ) { if (float64_is_signaling_nan(a_)) { - bits64 a = float64_val(a_); #if SNAN_BIT_IS_ONE - a &= ~LIT64( 0x0008000000000000 ); +# if defined(TARGET_MIPS) + return float64_default_nan; +# else +# error Rules for silencing a signaling NaN are target-specific +# endif #else + bits64 a = float64_val(a_); a |= LIT64( 0x0008000000000000 ); -#endif return make_float64(a); +#endif } return a_; } |