diff options
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat-specialize.h | 108 |
1 files changed, 68 insertions, 40 deletions
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index 2802eaa8d9..8f9dd5c454 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -30,6 +30,12 @@ these four paragraphs for those parts of this code that are retained. =============================================================================*/ +#if defined(TARGET_MIPS) || defined(TARGET_HPPA) +#define SNAN_BIT_IS_ONE 1 +#else +#define SNAN_BIT_IS_ONE 0 +#endif + /*---------------------------------------------------------------------------- | Underflow tininess-detection mode, statically initialized to default value. | (The declaration in `softfloat.h' must match the `int8' type here.) @@ -45,9 +51,7 @@ int8 float_detect_tininess = float_tininess_after_rounding; void float_raise( int8 flags STATUS_PARAM ) { - STATUS(float_exception_flags) |= flags; - } /*---------------------------------------------------------------------------- @@ -61,20 +65,20 @@ typedef struct { /*---------------------------------------------------------------------------- | The pattern for a default generated single-precision NaN. *----------------------------------------------------------------------------*/ -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) -#define float32_default_nan 0xFF800000 +#if SNAN_BIT_IS_ONE +#define float32_default_nan 0x7FBFFFFF #else #define float32_default_nan 0xFFC00000 #endif /*---------------------------------------------------------------------------- -| Returns 1 if the single-precision floating-point value `a' is a NaN; -| otherwise returns 0. +| Returns 1 if the single-precision floating-point value `a' is a quiet +| NaN; otherwise returns 0. *----------------------------------------------------------------------------*/ int float32_is_nan( float32 a ) { -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) +#if SNAN_BIT_IS_ONE return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF ); #else return ( 0xFF800000 <= (bits32) ( a<<1 ) ); @@ -88,7 +92,7 @@ int float32_is_nan( float32 a ) int float32_is_signaling_nan( float32 a ) { -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) +#if SNAN_BIT_IS_ONE return ( 0xFF800000 <= (bits32) ( a<<1 ) ); #else return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF ); @@ -110,7 +114,6 @@ static commonNaNT float32ToCommonNaN( float32 a STATUS_PARAM ) z.low = 0; z.high = ( (bits64) a )<<41; return z; - } /*---------------------------------------------------------------------------- @@ -120,9 +123,7 @@ static commonNaNT float32ToCommonNaN( float32 a STATUS_PARAM ) static float32 commonNaNToFloat32( commonNaNT a ) { - return ( ( (bits32) a.sign )<<31 ) | 0x7FC00000 | ( a.high>>41 ); - } /*---------------------------------------------------------------------------- @@ -139,7 +140,7 @@ static float32 propagateFloat32NaN( float32 a, float32 b STATUS_PARAM) aIsSignalingNaN = float32_is_signaling_nan( a ); bIsNaN = float32_is_nan( b ); bIsSignalingNaN = float32_is_signaling_nan( b ); -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) +#if SNAN_BIT_IS_ONE a &= ~0x00400000; b &= ~0x00400000; #else @@ -161,26 +162,25 @@ static float32 propagateFloat32NaN( float32 a, float32 b STATUS_PARAM) else { return b; } - } /*---------------------------------------------------------------------------- | The pattern for a default generated double-precision NaN. *----------------------------------------------------------------------------*/ -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) -#define float64_default_nan LIT64( 0xFFF0000000000000 ) +#if SNAN_BIT_IS_ONE +#define float64_default_nan LIT64( 0x7FF7FFFFFFFFFFFF ) #else #define float64_default_nan LIT64( 0xFFF8000000000000 ) #endif /*---------------------------------------------------------------------------- -| Returns 1 if the double-precision floating-point value `a' is a NaN; -| otherwise returns 0. +| Returns 1 if the double-precision floating-point value `a' is a quiet +| NaN; otherwise returns 0. *----------------------------------------------------------------------------*/ int float64_is_nan( float64 a ) { -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) +#if SNAN_BIT_IS_ONE return ( ( ( a>>51 ) & 0xFFF ) == 0xFFE ) && ( a & LIT64( 0x0007FFFFFFFFFFFF ) ); @@ -196,7 +196,7 @@ int float64_is_nan( float64 a ) int float64_is_signaling_nan( float64 a ) { -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) +#if SNAN_BIT_IS_ONE return ( LIT64( 0xFFF0000000000000 ) <= (bits64) ( a<<1 ) ); #else return @@ -220,7 +220,6 @@ static commonNaNT float64ToCommonNaN( float64 a STATUS_PARAM) z.low = 0; z.high = a<<12; return z; - } /*---------------------------------------------------------------------------- @@ -230,12 +229,10 @@ static commonNaNT float64ToCommonNaN( float64 a STATUS_PARAM) static float64 commonNaNToFloat64( commonNaNT a ) { - return ( ( (bits64) a.sign )<<63 ) | LIT64( 0x7FF8000000000000 ) | ( a.high>>12 ); - } /*---------------------------------------------------------------------------- @@ -252,7 +249,7 @@ static float64 propagateFloat64NaN( float64 a, float64 b STATUS_PARAM) aIsSignalingNaN = float64_is_signaling_nan( a ); bIsNaN = float64_is_nan( b ); bIsSignalingNaN = float64_is_signaling_nan( b ); -#if defined(TARGET_MIPS) || defined(TARGET_HPPA) +#if SNAN_BIT_IS_ONE a &= ~LIT64( 0x0008000000000000 ); b &= ~LIT64( 0x0008000000000000 ); #else @@ -274,7 +271,6 @@ static float64 propagateFloat64NaN( float64 a, float64 b STATUS_PARAM) else { return b; } - } #ifdef FLOATX80 @@ -284,19 +280,32 @@ static float64 propagateFloat64NaN( float64 a, float64 b STATUS_PARAM) | `high' and `low' values hold the most- and least-significant bits, | respectively. *----------------------------------------------------------------------------*/ +#if SNAN_BIT_IS_ONE +#define floatx80_default_nan_high 0x7FFF +#define floatx80_default_nan_low LIT64( 0xBFFFFFFFFFFFFFFF ) +#else #define floatx80_default_nan_high 0xFFFF #define floatx80_default_nan_low LIT64( 0xC000000000000000 ) +#endif /*---------------------------------------------------------------------------- | Returns 1 if the extended double-precision floating-point value `a' is a -| NaN; otherwise returns 0. +| quiet NaN; otherwise returns 0. *----------------------------------------------------------------------------*/ int floatx80_is_nan( floatx80 a ) { +#if SNAN_BIT_IS_ONE + bits64 aLow; + aLow = a.low & ~ LIT64( 0x4000000000000000 ); + return + ( ( a.high & 0x7FFF ) == 0x7FFF ) + && (bits64) ( aLow<<1 ) + && ( a.low == aLow ); +#else return ( ( a.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( a.low<<1 ); - +#endif } /*---------------------------------------------------------------------------- @@ -306,6 +315,9 @@ int floatx80_is_nan( floatx80 a ) int floatx80_is_signaling_nan( floatx80 a ) { +#if SNAN_BIT_IS_ONE + return ( ( a.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( a.low<<1 ); +#else bits64 aLow; aLow = a.low & ~ LIT64( 0x4000000000000000 ); @@ -313,7 +325,7 @@ int floatx80_is_signaling_nan( floatx80 a ) ( ( a.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( aLow<<1 ) && ( a.low == aLow ); - +#endif } /*---------------------------------------------------------------------------- @@ -331,7 +343,6 @@ static commonNaNT floatx80ToCommonNaN( floatx80 a STATUS_PARAM) z.low = 0; z.high = a.low<<1; return z; - } /*---------------------------------------------------------------------------- @@ -346,7 +357,6 @@ static floatx80 commonNaNToFloatx80( commonNaNT a ) z.low = LIT64( 0xC000000000000000 ) | ( a.high>>1 ); z.high = ( ( (bits16) a.sign )<<15 ) | 0x7FFF; return z; - } /*---------------------------------------------------------------------------- @@ -363,8 +373,13 @@ static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b STATUS_PARAM) aIsSignalingNaN = floatx80_is_signaling_nan( a ); bIsNaN = floatx80_is_nan( b ); bIsSignalingNaN = floatx80_is_signaling_nan( b ); +#if SNAN_BIT_IS_ONE + a.low &= ~LIT64( 0xC000000000000000 ); + b.low &= ~LIT64( 0xC000000000000000 ); +#else a.low |= LIT64( 0xC000000000000000 ); b.low |= LIT64( 0xC000000000000000 ); +#endif if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid STATUS_VAR); if ( aIsSignalingNaN ) { if ( bIsSignalingNaN ) goto returnLargerSignificand; @@ -380,7 +395,6 @@ static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b STATUS_PARAM) else { return b; } - } #endif @@ -391,21 +405,30 @@ static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b STATUS_PARAM) | The pattern for a default generated quadruple-precision NaN. The `high' and | `low' values hold the most- and least-significant bits, respectively. *----------------------------------------------------------------------------*/ +#if SNAN_BIT_IS_ONE +#define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF ) +#define float128_default_nan_low LIT64( 0xFFFFFFFFFFFFFFFF ) +#else #define float128_default_nan_high LIT64( 0xFFFF800000000000 ) #define float128_default_nan_low LIT64( 0x0000000000000000 ) +#endif /*---------------------------------------------------------------------------- -| Returns 1 if the quadruple-precision floating-point value `a' is a NaN; -| otherwise returns 0. +| Returns 1 if the quadruple-precision floating-point value `a' is a quiet +| NaN; otherwise returns 0. *----------------------------------------------------------------------------*/ int float128_is_nan( float128 a ) { - +#if SNAN_BIT_IS_ONE + return + ( ( ( a.high>>47 ) & 0xFFFF ) == 0xFFFE ) + && ( a.low || ( a.high & LIT64( 0x00007FFFFFFFFFFF ) ) ); +#else return ( LIT64( 0xFFFE000000000000 ) <= (bits64) ( a.high<<1 ) ) && ( a.low || ( a.high & LIT64( 0x0000FFFFFFFFFFFF ) ) ); - +#endif } /*---------------------------------------------------------------------------- @@ -415,11 +438,15 @@ int float128_is_nan( float128 a ) int float128_is_signaling_nan( float128 a ) { - +#if SNAN_BIT_IS_ONE + return + ( LIT64( 0xFFFE000000000000 ) <= (bits64) ( a.high<<1 ) ) + && ( a.low || ( a.high & LIT64( 0x0000FFFFFFFFFFFF ) ) ); +#else return ( ( ( a.high>>47 ) & 0xFFFF ) == 0xFFFE ) && ( a.low || ( a.high & LIT64( 0x00007FFFFFFFFFFF ) ) ); - +#endif } /*---------------------------------------------------------------------------- @@ -436,7 +463,6 @@ static commonNaNT float128ToCommonNaN( float128 a STATUS_PARAM) z.sign = a.high>>63; shortShift128Left( a.high, a.low, 16, &z.high, &z.low ); return z; - } /*---------------------------------------------------------------------------- @@ -451,7 +477,6 @@ static float128 commonNaNToFloat128( commonNaNT a ) shift128Right( a.high, a.low, 16, &z.high, &z.low ); z.high |= ( ( (bits64) a.sign )<<63 ) | LIT64( 0x7FFF800000000000 ); return z; - } /*---------------------------------------------------------------------------- @@ -468,8 +493,13 @@ static float128 propagateFloat128NaN( float128 a, float128 b STATUS_PARAM) aIsSignalingNaN = float128_is_signaling_nan( a ); bIsNaN = float128_is_nan( b ); bIsSignalingNaN = float128_is_signaling_nan( b ); +#if SNAN_BIT_IS_ONE + a.high &= ~LIT64( 0x0000800000000000 ); + b.high &= ~LIT64( 0x0000800000000000 ); +#else a.high |= LIT64( 0x0000800000000000 ); b.high |= LIT64( 0x0000800000000000 ); +#endif if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid STATUS_VAR); if ( aIsSignalingNaN ) { if ( bIsSignalingNaN ) goto returnLargerSignificand; @@ -485,8 +515,6 @@ static float128 propagateFloat128NaN( float128 a, float128 b STATUS_PARAM) else { return b; } - } #endif - |