softfloat: Implement flushing input denormals to zero
Add support to softfloat for flushing input denormal float32 and float64 to zero. softfloat's existing 'flush_to_zero' flag only flushes denormals to zero on output. Some CPUs need input denormals to be flushed before processing as well. Implement this, using a new status flag to enable it and a new exception status bit to indicate when it has happened. Existing CPUs should be unaffected as there is no behaviour change unless the mode is enabled. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell
Aurelien Jarno
parent
838fa72d0b
commit
37d18660bb
104
fpu/softfloat.c
104
fpu/softfloat.c
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@ -30,8 +30,6 @@ these four paragraphs for those parts of this code that are retained.
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=============================================================================*/
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/* FIXME: Flush-To-Zero only effects results. Denormal inputs should also
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be flushed to zero. */
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#include "softfloat.h"
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/*----------------------------------------------------------------------------
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@ -203,6 +201,21 @@ INLINE flag extractFloat32Sign( float32 a )
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}
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/*----------------------------------------------------------------------------
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| If `a' is denormal and we are in flush-to-zero mode then set the
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| input-denormal exception and return zero. Otherwise just return the value.
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*----------------------------------------------------------------------------*/
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static float32 float32_squash_input_denormal(float32 a STATUS_PARAM)
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{
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if (STATUS(flush_inputs_to_zero)) {
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if (extractFloat32Exp(a) == 0 && extractFloat32Frac(a) != 0) {
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float_raise(float_flag_input_denormal STATUS_VAR);
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return make_float32(float32_val(a) & 0x80000000);
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}
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}
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return a;
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}
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/*----------------------------------------------------------------------------
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| Normalizes the subnormal single-precision floating-point value represented
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| by the denormalized significand `aSig'. The normalized exponent and
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@ -367,6 +380,21 @@ INLINE flag extractFloat64Sign( float64 a )
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}
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/*----------------------------------------------------------------------------
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| If `a' is denormal and we are in flush-to-zero mode then set the
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| input-denormal exception and return zero. Otherwise just return the value.
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*----------------------------------------------------------------------------*/
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static float64 float64_squash_input_denormal(float64 a STATUS_PARAM)
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{
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if (STATUS(flush_inputs_to_zero)) {
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if (extractFloat64Exp(a) == 0 && extractFloat64Frac(a) != 0) {
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float_raise(float_flag_input_denormal STATUS_VAR);
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return make_float64(float64_val(a) & (1ULL << 63));
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}
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}
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return a;
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}
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/*----------------------------------------------------------------------------
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| Normalizes the subnormal double-precision floating-point value represented
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| by the denormalized significand `aSig'. The normalized exponent and
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@ -1298,6 +1326,7 @@ int32 float32_to_int32( float32 a STATUS_PARAM )
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bits32 aSig;
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bits64 aSig64;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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aSign = extractFloat32Sign( a );
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@ -1327,6 +1356,7 @@ int32 float32_to_int32_round_to_zero( float32 a STATUS_PARAM )
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int16 aExp, shiftCount;
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bits32 aSig;
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int32 z;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -1418,6 +1448,7 @@ int64 float32_to_int64( float32 a STATUS_PARAM )
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int16 aExp, shiftCount;
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bits32 aSig;
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bits64 aSig64, aSigExtra;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -1455,6 +1486,7 @@ int64 float32_to_int64_round_to_zero( float32 a STATUS_PARAM )
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bits32 aSig;
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bits64 aSig64;
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int64 z;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -1496,6 +1528,7 @@ float64 float32_to_float64( float32 a STATUS_PARAM )
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flag aSign;
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int16 aExp;
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bits32 aSig;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -1528,6 +1561,7 @@ floatx80 float32_to_floatx80( float32 a STATUS_PARAM )
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int16 aExp;
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bits32 aSig;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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aSign = extractFloat32Sign( a );
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@ -1561,6 +1595,7 @@ float128 float32_to_float128( float32 a STATUS_PARAM )
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int16 aExp;
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bits32 aSig;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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aSign = extractFloat32Sign( a );
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@ -1593,6 +1628,7 @@ float32 float32_round_to_int( float32 a STATUS_PARAM)
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bits32 lastBitMask, roundBitsMask;
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int8 roundingMode;
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bits32 z;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aExp = extractFloat32Exp( a );
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if ( 0x96 <= aExp ) {
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@ -1796,6 +1832,8 @@ static float32 subFloat32Sigs( float32 a, float32 b, flag zSign STATUS_PARAM)
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float32 float32_add( float32 a, float32 b STATUS_PARAM )
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{
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flag aSign, bSign;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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aSign = extractFloat32Sign( a );
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bSign = extractFloat32Sign( b );
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@ -1817,6 +1855,8 @@ float32 float32_add( float32 a, float32 b STATUS_PARAM )
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float32 float32_sub( float32 a, float32 b STATUS_PARAM )
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{
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flag aSign, bSign;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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aSign = extractFloat32Sign( a );
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bSign = extractFloat32Sign( b );
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@ -1843,6 +1883,9 @@ float32 float32_mul( float32 a, float32 b STATUS_PARAM )
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bits64 zSig64;
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bits32 zSig;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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aSign = extractFloat32Sign( a );
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@ -1900,6 +1943,8 @@ float32 float32_div( float32 a, float32 b STATUS_PARAM )
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flag aSign, bSign, zSign;
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int16 aExp, bExp, zExp;
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bits32 aSig, bSig, zSig;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -1966,6 +2011,8 @@ float32 float32_rem( float32 a, float32 b STATUS_PARAM )
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bits64 aSig64, bSig64, q64;
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bits32 alternateASig;
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sbits32 sigMean;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -2062,6 +2109,7 @@ float32 float32_sqrt( float32 a STATUS_PARAM )
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int16 aExp, zExp;
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bits32 aSig, zSig;
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bits64 rem, term;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -2148,6 +2196,7 @@ float32 float32_exp2( float32 a STATUS_PARAM )
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bits32 aSig;
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float64 r, x, xn;
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int i;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -2194,6 +2243,7 @@ float32 float32_log2( float32 a STATUS_PARAM )
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int16 aExp;
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bits32 aSig, zSig, i;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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aSign = extractFloat32Sign( a );
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@ -2238,6 +2288,8 @@ float32 float32_log2( float32 a STATUS_PARAM )
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int float32_eq( float32 a, float32 b STATUS_PARAM )
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{
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
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|| ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
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@ -2263,6 +2315,8 @@ int float32_le( float32 a, float32 b STATUS_PARAM )
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{
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flag aSign, bSign;
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bits32 av, bv;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
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|| ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
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@ -2289,6 +2343,8 @@ int float32_lt( float32 a, float32 b STATUS_PARAM )
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{
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flag aSign, bSign;
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bits32 av, bv;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
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|| ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
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@ -2315,6 +2371,8 @@ int float32_lt( float32 a, float32 b STATUS_PARAM )
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int float32_eq_signaling( float32 a, float32 b STATUS_PARAM )
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{
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bits32 av, bv;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
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|| ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
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@ -2339,6 +2397,8 @@ int float32_le_quiet( float32 a, float32 b STATUS_PARAM )
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{
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flag aSign, bSign;
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bits32 av, bv;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
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|| ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
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@ -2368,6 +2428,8 @@ int float32_lt_quiet( float32 a, float32 b STATUS_PARAM )
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{
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flag aSign, bSign;
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bits32 av, bv;
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a = float32_squash_input_denormal(a STATUS_VAR);
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b = float32_squash_input_denormal(b STATUS_VAR);
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if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
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|| ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
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@ -2401,6 +2463,7 @@ int32 float64_to_int32( float64 a STATUS_PARAM )
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flag aSign;
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int16 aExp, shiftCount;
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bits64 aSig;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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@ -2429,6 +2492,7 @@ int32 float64_to_int32_round_to_zero( float64 a STATUS_PARAM )
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int16 aExp, shiftCount;
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bits64 aSig, savedASig;
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int32 z;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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@ -2525,6 +2589,7 @@ int64 float64_to_int64( float64 a STATUS_PARAM )
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flag aSign;
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int16 aExp, shiftCount;
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bits64 aSig, aSigExtra;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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@ -2568,6 +2633,7 @@ int64 float64_to_int64_round_to_zero( float64 a STATUS_PARAM )
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int16 aExp, shiftCount;
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bits64 aSig;
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int64 z;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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@ -2617,6 +2683,7 @@ float32 float64_to_float32( float64 a STATUS_PARAM )
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int16 aExp;
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bits64 aSig;
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bits32 zSig;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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@ -2694,6 +2761,7 @@ bits16 float32_to_float16( float32 a, flag ieee STATUS_PARAM)
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bits32 mask;
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bits32 increment;
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int8 roundingMode;
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a = float32_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat32Frac( a );
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aExp = extractFloat32Exp( a );
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@ -2788,6 +2856,7 @@ floatx80 float64_to_floatx80( float64 a STATUS_PARAM )
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int16 aExp;
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bits64 aSig;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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aSign = extractFloat64Sign( a );
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@ -2822,6 +2891,7 @@ float128 float64_to_float128( float64 a STATUS_PARAM )
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int16 aExp;
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bits64 aSig, zSig0, zSig1;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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aSign = extractFloat64Sign( a );
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@ -2855,6 +2925,7 @@ float64 float64_round_to_int( float64 a STATUS_PARAM )
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bits64 lastBitMask, roundBitsMask;
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int8 roundingMode;
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bits64 z;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aExp = extractFloat64Exp( a );
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if ( 0x433 <= aExp ) {
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@ -3071,6 +3142,8 @@ static float64 subFloat64Sigs( float64 a, float64 b, flag zSign STATUS_PARAM )
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float64 float64_add( float64 a, float64 b STATUS_PARAM )
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{
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flag aSign, bSign;
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a = float64_squash_input_denormal(a STATUS_VAR);
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b = float64_squash_input_denormal(b STATUS_VAR);
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aSign = extractFloat64Sign( a );
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bSign = extractFloat64Sign( b );
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@ -3092,6 +3165,8 @@ float64 float64_add( float64 a, float64 b STATUS_PARAM )
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float64 float64_sub( float64 a, float64 b STATUS_PARAM )
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{
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flag aSign, bSign;
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a = float64_squash_input_denormal(a STATUS_VAR);
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b = float64_squash_input_denormal(b STATUS_VAR);
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aSign = extractFloat64Sign( a );
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bSign = extractFloat64Sign( b );
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@ -3116,6 +3191,9 @@ float64 float64_mul( float64 a, float64 b STATUS_PARAM )
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int16 aExp, bExp, zExp;
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bits64 aSig, bSig, zSig0, zSig1;
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a = float64_squash_input_denormal(a STATUS_VAR);
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b = float64_squash_input_denormal(b STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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aSign = extractFloat64Sign( a );
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@ -3175,6 +3253,8 @@ float64 float64_div( float64 a, float64 b STATUS_PARAM )
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bits64 aSig, bSig, zSig;
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bits64 rem0, rem1;
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bits64 term0, term1;
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a = float64_squash_input_denormal(a STATUS_VAR);
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b = float64_squash_input_denormal(b STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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@ -3246,6 +3326,8 @@ float64 float64_rem( float64 a, float64 b STATUS_PARAM )
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bits64 q, alternateASig;
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sbits64 sigMean;
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a = float64_squash_input_denormal(a STATUS_VAR);
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b = float64_squash_input_denormal(b STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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aSign = extractFloat64Sign( a );
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@ -3328,6 +3410,7 @@ float64 float64_sqrt( float64 a STATUS_PARAM )
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int16 aExp, zExp;
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bits64 aSig, zSig, doubleZSig;
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bits64 rem0, rem1, term0, term1;
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a = float64_squash_input_denormal(a STATUS_VAR);
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aSig = extractFloat64Frac( a );
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aExp = extractFloat64Exp( a );
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@ -3377,6 +3460,7 @@ float64 float64_log2( float64 a STATUS_PARAM )
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flag aSign, zSign;
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int16 aExp;
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bits64 aSig, aSig0, aSig1, zSig, i;
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
|
||||
aSig = extractFloat64Frac( a );
|
||||
aExp = extractFloat64Exp( a );
|
||||
|
|
@ -3422,6 +3506,8 @@ float64 float64_log2( float64 a STATUS_PARAM )
|
|||
int float64_eq( float64 a, float64 b STATUS_PARAM )
|
||||
{
|
||||
bits64 av, bv;
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
b = float64_squash_input_denormal(b STATUS_VAR);
|
||||
|
||||
if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
|
||||
|| ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
|
||||
|
|
@ -3448,6 +3534,8 @@ int float64_le( float64 a, float64 b STATUS_PARAM )
|
|||
{
|
||||
flag aSign, bSign;
|
||||
bits64 av, bv;
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
b = float64_squash_input_denormal(b STATUS_VAR);
|
||||
|
||||
if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
|
||||
|| ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
|
||||
|
|
@ -3475,6 +3563,8 @@ int float64_lt( float64 a, float64 b STATUS_PARAM )
|
|||
flag aSign, bSign;
|
||||
bits64 av, bv;
|
||||
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
b = float64_squash_input_denormal(b STATUS_VAR);
|
||||
if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
|
||||
|| ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
|
||||
) {
|
||||
|
|
@ -3500,6 +3590,8 @@ int float64_lt( float64 a, float64 b STATUS_PARAM )
|
|||
int float64_eq_signaling( float64 a, float64 b STATUS_PARAM )
|
||||
{
|
||||
bits64 av, bv;
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
b = float64_squash_input_denormal(b STATUS_VAR);
|
||||
|
||||
if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
|
||||
|| ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
|
||||
|
|
@ -3524,6 +3616,8 @@ int float64_le_quiet( float64 a, float64 b STATUS_PARAM )
|
|||
{
|
||||
flag aSign, bSign;
|
||||
bits64 av, bv;
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
b = float64_squash_input_denormal(b STATUS_VAR);
|
||||
|
||||
if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
|
||||
|| ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
|
||||
|
|
@ -3553,6 +3647,8 @@ int float64_lt_quiet( float64 a, float64 b STATUS_PARAM )
|
|||
{
|
||||
flag aSign, bSign;
|
||||
bits64 av, bv;
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
b = float64_squash_input_denormal(b STATUS_VAR);
|
||||
|
||||
if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
|
||||
|| ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
|
||||
|
|
@ -5833,6 +5929,8 @@ INLINE int float ## s ## _compare_internal( float ## s a, float ## s b, \
|
|||
{ \
|
||||
flag aSign, bSign; \
|
||||
bits ## s av, bv; \
|
||||
a = float ## s ## _squash_input_denormal(a STATUS_VAR); \
|
||||
b = float ## s ## _squash_input_denormal(b STATUS_VAR); \
|
||||
\
|
||||
if (( ( extractFloat ## s ## Exp( a ) == nan_exp ) && \
|
||||
extractFloat ## s ## Frac( a ) ) || \
|
||||
|
|
@ -5929,6 +6027,7 @@ float32 float32_scalbn( float32 a, int n STATUS_PARAM )
|
|||
int16 aExp;
|
||||
bits32 aSig;
|
||||
|
||||
a = float32_squash_input_denormal(a STATUS_VAR);
|
||||
aSig = extractFloat32Frac( a );
|
||||
aExp = extractFloat32Exp( a );
|
||||
aSign = extractFloat32Sign( a );
|
||||
|
|
@ -5952,6 +6051,7 @@ float64 float64_scalbn( float64 a, int n STATUS_PARAM )
|
|||
int16 aExp;
|
||||
bits64 aSig;
|
||||
|
||||
a = float64_squash_input_denormal(a STATUS_VAR);
|
||||
aSig = extractFloat64Frac( a );
|
||||
aExp = extractFloat64Exp( a );
|
||||
aSign = extractFloat64Sign( a );
|
||||
|
|
|
|||
|
|
@ -180,7 +180,8 @@ enum {
|
|||
float_flag_divbyzero = 4,
|
||||
float_flag_overflow = 8,
|
||||
float_flag_underflow = 16,
|
||||
float_flag_inexact = 32
|
||||
float_flag_inexact = 32,
|
||||
float_flag_input_denormal = 64
|
||||
};
|
||||
|
||||
typedef struct float_status {
|
||||
|
|
@ -190,7 +191,10 @@ typedef struct float_status {
|
|||
#ifdef FLOATX80
|
||||
signed char floatx80_rounding_precision;
|
||||
#endif
|
||||
/* should denormalised results go to zero and set the inexact flag? */
|
||||
flag flush_to_zero;
|
||||
/* should denormalised inputs go to zero and set the input_denormal flag? */
|
||||
flag flush_inputs_to_zero;
|
||||
flag default_nan_mode;
|
||||
} float_status;
|
||||
|
||||
|
|
@ -200,6 +204,10 @@ INLINE void set_flush_to_zero(flag val STATUS_PARAM)
|
|||
{
|
||||
STATUS(flush_to_zero) = val;
|
||||
}
|
||||
INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
|
||||
{
|
||||
STATUS(flush_inputs_to_zero) = val;
|
||||
}
|
||||
INLINE void set_default_nan_mode(flag val STATUS_PARAM)
|
||||
{
|
||||
STATUS(default_nan_mode) = val;
|
||||
|
|
@ -294,11 +302,17 @@ float32 float32_scalbn( float32, int STATUS_PARAM );
|
|||
|
||||
INLINE float32 float32_abs(float32 a)
|
||||
{
|
||||
/* Note that abs does *not* handle NaN specially, nor does
|
||||
* it flush denormal inputs to zero.
|
||||
*/
|
||||
return make_float32(float32_val(a) & 0x7fffffff);
|
||||
}
|
||||
|
||||
INLINE float32 float32_chs(float32 a)
|
||||
{
|
||||
/* Note that chs does *not* handle NaN specially, nor does
|
||||
* it flush denormal inputs to zero.
|
||||
*/
|
||||
return make_float32(float32_val(a) ^ 0x80000000);
|
||||
}
|
||||
|
||||
|
|
@ -374,11 +388,17 @@ float64 float64_scalbn( float64, int STATUS_PARAM );
|
|||
|
||||
INLINE float64 float64_abs(float64 a)
|
||||
{
|
||||
/* Note that abs does *not* handle NaN specially, nor does
|
||||
* it flush denormal inputs to zero.
|
||||
*/
|
||||
return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
|
||||
}
|
||||
|
||||
INLINE float64 float64_chs(float64 a)
|
||||
{
|
||||
/* Note that chs does *not* handle NaN specially, nor does
|
||||
* it flush denormal inputs to zero.
|
||||
*/
|
||||
return make_float64(float64_val(a) ^ 0x8000000000000000LL);
|
||||
}
|
||||
|
||||
|
|
|
|||
Reference in New Issue