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-rw-r--r--fpu/softfloat-specialize.h261
1 files changed, 183 insertions, 78 deletions
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h
index d430f58..93fe06e 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;
-
}
/*----------------------------------------------------------------------------
@@ -61,18 +65,31 @@ typedef struct {
/*----------------------------------------------------------------------------
| The pattern for a default generated single-precision NaN.
*----------------------------------------------------------------------------*/
-#define float32_default_nan 0xFFC00000
+#if defined(TARGET_SPARC)
+#define float32_default_nan make_float32(0x7FFFFFFF)
+#elif defined(TARGET_POWERPC)
+#define float32_default_nan make_float32(0x7FC00000)
+#elif defined(TARGET_HPPA)
+#define float32_default_nan make_float32(0x7FA00000)
+#elif SNAN_BIT_IS_ONE
+#define float32_default_nan make_float32(0x7FBFFFFF)
+#else
+#define float32_default_nan make_float32(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.
*----------------------------------------------------------------------------*/
-flag float32_is_nan( float32 a )
+int float32_is_nan( float32 a_ )
{
-
- return ( 0xFF000000 < (bits32) ( a<<1 ) );
-
+ uint32_t a = float32_val(a_);
+#if SNAN_BIT_IS_ONE
+ return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
+#else
+ return ( 0xFF800000 <= (bits32) ( a<<1 ) );
+#endif
}
/*----------------------------------------------------------------------------
@@ -80,11 +97,14 @@ flag float32_is_nan( float32 a )
| NaN; otherwise returns 0.
*----------------------------------------------------------------------------*/
-flag float32_is_signaling_nan( float32 a )
+int float32_is_signaling_nan( float32 a_ )
{
-
+ uint32_t a = float32_val(a_);
+#if SNAN_BIT_IS_ONE
+ return ( 0xFF800000 <= (bits32) ( a<<1 ) );
+#else
return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
-
+#endif
}
/*----------------------------------------------------------------------------
@@ -98,11 +118,10 @@ static commonNaNT float32ToCommonNaN( float32 a STATUS_PARAM )
commonNaNT z;
if ( float32_is_signaling_nan( a ) ) float_raise( float_flag_invalid STATUS_VAR );
- z.sign = a>>31;
+ z.sign = float32_val(a)>>31;
z.low = 0;
- z.high = ( (bits64) a )<<41;
+ z.high = ( (bits64) float32_val(a) )<<41;
return z;
-
}
/*----------------------------------------------------------------------------
@@ -112,9 +131,12 @@ static commonNaNT float32ToCommonNaN( float32 a STATUS_PARAM )
static float32 commonNaNToFloat32( commonNaNT a )
{
-
- return ( ( (bits32) a.sign )<<31 ) | 0x7FC00000 | ( a.high>>41 );
-
+ bits32 mantissa = a.high>>41;
+ if ( mantissa )
+ return make_float32(
+ ( ( (bits32) a.sign )<<31 ) | 0x7F800000 | ( a.high>>41 ) );
+ else
+ return float32_default_nan;
}
/*----------------------------------------------------------------------------
@@ -126,46 +148,75 @@ static float32 commonNaNToFloat32( commonNaNT a )
static float32 propagateFloat32NaN( float32 a, float32 b STATUS_PARAM)
{
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
+ bits32 av, bv, res;
aIsNaN = float32_is_nan( a );
aIsSignalingNaN = float32_is_signaling_nan( a );
bIsNaN = float32_is_nan( b );
bIsSignalingNaN = float32_is_signaling_nan( b );
- a |= 0x00400000;
- b |= 0x00400000;
+ av = float32_val(a);
+ bv = float32_val(b);
+#if SNAN_BIT_IS_ONE
+ av &= ~0x00400000;
+ bv &= ~0x00400000;
+#else
+ av |= 0x00400000;
+ bv |= 0x00400000;
+#endif
if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid STATUS_VAR);
if ( aIsSignalingNaN ) {
if ( bIsSignalingNaN ) goto returnLargerSignificand;
- return bIsNaN ? b : a;
+ res = bIsNaN ? bv : av;
}
else if ( aIsNaN ) {
- if ( bIsSignalingNaN | ! bIsNaN ) return a;
+ if ( bIsSignalingNaN | ! bIsNaN )
+ res = av;
+ else {
returnLargerSignificand:
- if ( (bits32) ( a<<1 ) < (bits32) ( b<<1 ) ) return b;
- if ( (bits32) ( b<<1 ) < (bits32) ( a<<1 ) ) return a;
- return ( a < b ) ? a : b;
+ if ( (bits32) ( av<<1 ) < (bits32) ( bv<<1 ) )
+ res = bv;
+ else if ( (bits32) ( bv<<1 ) < (bits32) ( av<<1 ) )
+ res = av;
+ else
+ res = ( av < bv ) ? av : bv;
+ }
}
else {
- return b;
+ res = bv;
}
-
+ return make_float32(res);
}
/*----------------------------------------------------------------------------
| The pattern for a default generated double-precision NaN.
*----------------------------------------------------------------------------*/
-#define float64_default_nan LIT64( 0xFFF8000000000000 )
+#if defined(TARGET_SPARC)
+#define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
+#elif defined(TARGET_POWERPC)
+#define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
+#elif defined(TARGET_HPPA)
+#define float64_default_nan make_float64(LIT64( 0x7FF4000000000000 ))
+#elif SNAN_BIT_IS_ONE
+#define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
+#else
+#define float64_default_nan make_float64(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.
*----------------------------------------------------------------------------*/
-flag float64_is_nan( float64 a )
+int float64_is_nan( float64 a_ )
{
-
- return ( LIT64( 0xFFE0000000000000 ) < (bits64) ( a<<1 ) );
-
+ bits64 a = float64_val(a_);
+#if SNAN_BIT_IS_ONE
+ return
+ ( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
+ && ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
+#else
+ return ( LIT64( 0xFFF0000000000000 ) <= (bits64) ( a<<1 ) );
+#endif
}
/*----------------------------------------------------------------------------
@@ -173,13 +224,16 @@ flag float64_is_nan( float64 a )
| NaN; otherwise returns 0.
*----------------------------------------------------------------------------*/
-flag float64_is_signaling_nan( float64 a )
+int float64_is_signaling_nan( float64 a_ )
{
-
+ bits64 a = float64_val(a_);
+#if SNAN_BIT_IS_ONE
+ return ( LIT64( 0xFFF0000000000000 ) <= (bits64) ( a<<1 ) );
+#else
return
( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
&& ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
-
+#endif
}
/*----------------------------------------------------------------------------
@@ -193,11 +247,10 @@ static commonNaNT float64ToCommonNaN( float64 a STATUS_PARAM)
commonNaNT z;
if ( float64_is_signaling_nan( a ) ) float_raise( float_flag_invalid STATUS_VAR);
- z.sign = a>>63;
+ z.sign = float64_val(a)>>63;
z.low = 0;
- z.high = a<<12;
+ z.high = float64_val(a)<<12;
return z;
-
}
/*----------------------------------------------------------------------------
@@ -207,12 +260,15 @@ static commonNaNT float64ToCommonNaN( float64 a STATUS_PARAM)
static float64 commonNaNToFloat64( commonNaNT a )
{
-
- return
- ( ( (bits64) a.sign )<<63 )
- | LIT64( 0x7FF8000000000000 )
- | ( a.high>>12 );
-
+ bits64 mantissa = a.high>>12;
+
+ if ( mantissa )
+ return make_float64(
+ ( ( (bits64) a.sign )<<63 )
+ | LIT64( 0x7FF0000000000000 )
+ | ( a.high>>12 ));
+ else
+ return float64_default_nan;
}
/*----------------------------------------------------------------------------
@@ -224,29 +280,43 @@ static float64 commonNaNToFloat64( commonNaNT a )
static float64 propagateFloat64NaN( float64 a, float64 b STATUS_PARAM)
{
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
+ bits64 av, bv, res;
aIsNaN = float64_is_nan( a );
aIsSignalingNaN = float64_is_signaling_nan( a );
bIsNaN = float64_is_nan( b );
bIsSignalingNaN = float64_is_signaling_nan( b );
- a |= LIT64( 0x0008000000000000 );
- b |= LIT64( 0x0008000000000000 );
+ av = float64_val(a);
+ bv = float64_val(b);
+#if SNAN_BIT_IS_ONE
+ av &= ~LIT64( 0x0008000000000000 );
+ bv &= ~LIT64( 0x0008000000000000 );
+#else
+ av |= LIT64( 0x0008000000000000 );
+ bv |= LIT64( 0x0008000000000000 );
+#endif
if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid STATUS_VAR);
if ( aIsSignalingNaN ) {
if ( bIsSignalingNaN ) goto returnLargerSignificand;
- return bIsNaN ? b : a;
+ res = bIsNaN ? bv : av;
}
else if ( aIsNaN ) {
- if ( bIsSignalingNaN | ! bIsNaN ) return a;
+ if ( bIsSignalingNaN | ! bIsNaN )
+ res = av;
+ else {
returnLargerSignificand:
- if ( (bits64) ( a<<1 ) < (bits64) ( b<<1 ) ) return b;
- if ( (bits64) ( b<<1 ) < (bits64) ( a<<1 ) ) return a;
- return ( a < b ) ? a : b;
+ if ( (bits64) ( av<<1 ) < (bits64) ( bv<<1 ) )
+ res = bv;
+ else if ( (bits64) ( bv<<1 ) < (bits64) ( av<<1 ) )
+ res = av;
+ else
+ res = ( av < bv ) ? av : bv;
+ }
}
else {
- return b;
+ res = bv;
}
-
+ return make_float64(res);
}
#ifdef FLOATX80
@@ -256,19 +326,32 @@ 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.
*----------------------------------------------------------------------------*/
-flag floatx80_is_nan( floatx80 a )
+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
}
/*----------------------------------------------------------------------------
@@ -276,8 +359,11 @@ flag floatx80_is_nan( floatx80 a )
| signaling NaN; otherwise returns 0.
*----------------------------------------------------------------------------*/
-flag floatx80_is_signaling_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 );
@@ -285,7 +371,7 @@ flag floatx80_is_signaling_nan( floatx80 a )
( ( a.high & 0x7FFF ) == 0x7FFF )
&& (bits64) ( aLow<<1 )
&& ( a.low == aLow );
-
+#endif
}
/*----------------------------------------------------------------------------
@@ -301,9 +387,8 @@ static commonNaNT floatx80ToCommonNaN( floatx80 a STATUS_PARAM)
if ( floatx80_is_signaling_nan( a ) ) float_raise( float_flag_invalid STATUS_VAR);
z.sign = a.high>>15;
z.low = 0;
- z.high = a.low<<1;
+ z.high = a.low;
return z;
-
}
/*----------------------------------------------------------------------------
@@ -315,10 +400,12 @@ static floatx80 commonNaNToFloatx80( commonNaNT a )
{
floatx80 z;
- z.low = LIT64( 0xC000000000000000 ) | ( a.high>>1 );
+ if (a.high)
+ z.low = a.high;
+ else
+ z.low = floatx80_default_nan_low;
z.high = ( ( (bits16) a.sign )<<15 ) | 0x7FFF;
return z;
-
}
/*----------------------------------------------------------------------------
@@ -335,8 +422,13 @@ 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;
@@ -352,7 +444,6 @@ static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b STATUS_PARAM)
else {
return b;
}
-
}
#endif
@@ -363,21 +454,30 @@ 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.
*----------------------------------------------------------------------------*/
-flag float128_is_nan( float128 a )
+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
}
/*----------------------------------------------------------------------------
@@ -385,13 +485,17 @@ flag float128_is_nan( float128 a )
| signaling NaN; otherwise returns 0.
*----------------------------------------------------------------------------*/
-flag float128_is_signaling_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
}
/*----------------------------------------------------------------------------
@@ -408,7 +512,6 @@ static commonNaNT float128ToCommonNaN( float128 a STATUS_PARAM)
z.sign = a.high>>63;
shortShift128Left( a.high, a.low, 16, &z.high, &z.low );
return z;
-
}
/*----------------------------------------------------------------------------
@@ -421,9 +524,8 @@ static float128 commonNaNToFloat128( commonNaNT a )
float128 z;
shift128Right( a.high, a.low, 16, &z.high, &z.low );
- z.high |= ( ( (bits64) a.sign )<<63 ) | LIT64( 0x7FFF800000000000 );
+ z.high |= ( ( (bits64) a.sign )<<63 ) | LIT64( 0x7FFF000000000000 );
return z;
-
}
/*----------------------------------------------------------------------------
@@ -440,8 +542,13 @@ 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;
@@ -457,8 +564,6 @@ static float128 propagateFloat128NaN( float128 a, float128 b STATUS_PARAM)
else {
return b;
}
-
}
#endif
-
generated by cgit v1.1 at 2024-05-15 23:56:01 +0000