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| author | Aurelien Jarno <aurelien@aurel32.net> | 2011-01-06 15:38:19 +0100 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2011-01-06 16:29:42 +0100 |
| commit | e024e881bb1a8b5085026589360d26ed97acdd64 (patch) | |
| tree | f37ab16c33ab3d7db622ee67191bb48b5701cbd0 | |
| parent | 084d19ba718a08d434dc44a83ff01f3152d59635 (diff) | |
| download | qemu-e024e881bb1a8b5085026589360d26ed97acdd64.tar.gz qemu-e024e881bb1a8b5085026589360d26ed97acdd64.tar.bz2 qemu-e024e881bb1a8b5085026589360d26ed97acdd64.zip | |
target-ppc: Implement correct NaN propagation rules
Implement the correct NaN propagation rules for PowerPC targets by
providing an appropriate pickNaN function.
Also fix the #ifdef tests for default NaN definition, the correct name
is TARGET_PPC instead of TARGET_POWERPC.
Reviewed-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | fpu/softfloat-specialize.h | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index acdd299f51..f293f24356 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -61,7 +61,7 @@ typedef struct { *----------------------------------------------------------------------------*/ #if defined(TARGET_SPARC) #define float32_default_nan make_float32(0x7FFFFFFF) -#elif defined(TARGET_POWERPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) +#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) #define float32_default_nan make_float32(0x7FC00000) #elif SNAN_BIT_IS_ONE #define float32_default_nan make_float32(0x7FBFFFFF) @@ -219,6 +219,21 @@ static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, return 1; } } +#elif defined(TARGET_PPC) +static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, + flag aIsLargerSignificand) +{ + /* PowerPC propagation rules: + * 1. A if it sNaN or qNaN + * 2. B if it sNaN or qNaN + * A signaling NaN is always silenced before returning it. + */ + if (aIsSNaN || aIsQNaN) { + return 0; + } else { + return 1; + } +} #else static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, flag aIsLargerSignificand) @@ -296,7 +311,7 @@ static float32 propagateFloat32NaN( float32 a, float32 b STATUS_PARAM) *----------------------------------------------------------------------------*/ #if defined(TARGET_SPARC) #define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF )) -#elif defined(TARGET_POWERPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) +#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) #define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 )) #elif SNAN_BIT_IS_ONE #define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF )) |