diff options
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat-specialize.h | 59 |
1 files changed, 16 insertions, 43 deletions
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index b1acc45aba..3ce5bb53bf 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -161,7 +161,8 @@ static float32 commonNaNToFloat32( commonNaNT a ) | The routine is passed various bits of information about the | two NaNs and should return 0 to select NaN a and 1 for NaN b. | Note that signalling NaNs are always squashed to quiet NaNs -| by the caller, by flipping the SNaN bit before returning them. +| by the caller, by calling floatXX_maybe_silence_nan() before +| returning them. | | aIsLargerSignificand is only valid if both a and b are NaNs | of some kind, and is true if a has the larger significand, @@ -233,7 +234,7 @@ static float32 propagateFloat32NaN( float32 a, float32 b STATUS_PARAM) { flag aIsQuietNaN, aIsSignalingNaN, bIsQuietNaN, bIsSignalingNaN; flag aIsLargerSignificand; - bits32 av, bv, res; + bits32 av, bv; if ( STATUS(default_nan_mode) ) return float32_default_nan; @@ -244,13 +245,7 @@ static float32 propagateFloat32NaN( float32 a, float32 b STATUS_PARAM) bIsSignalingNaN = float32_is_signaling_nan( b ); 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 ((bits32)(av<<1) < (bits32)(bv<<1)) { @@ -263,12 +258,10 @@ static float32 propagateFloat32NaN( float32 a, float32 b STATUS_PARAM) if (pickNaN(aIsQuietNaN, aIsSignalingNaN, bIsQuietNaN, bIsSignalingNaN, aIsLargerSignificand)) { - res = bv; + return float32_maybe_silence_nan(b); } else { - res = av; + return float32_maybe_silence_nan(a); } - - return make_float32(res); } /*---------------------------------------------------------------------------- @@ -386,7 +379,7 @@ static float64 propagateFloat64NaN( float64 a, float64 b STATUS_PARAM) { flag aIsQuietNaN, aIsSignalingNaN, bIsQuietNaN, bIsSignalingNaN; flag aIsLargerSignificand; - bits64 av, bv, res; + bits64 av, bv; if ( STATUS(default_nan_mode) ) return float64_default_nan; @@ -397,13 +390,7 @@ static float64 propagateFloat64NaN( float64 a, float64 b STATUS_PARAM) bIsSignalingNaN = float64_is_signaling_nan( b ); 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 ((bits64)(av<<1) < (bits64)(bv<<1)) { @@ -416,12 +403,10 @@ static float64 propagateFloat64NaN( float64 a, float64 b STATUS_PARAM) if (pickNaN(aIsQuietNaN, aIsSignalingNaN, bIsQuietNaN, bIsSignalingNaN, aIsLargerSignificand)) { - res = bv; + return float64_maybe_silence_nan(b); } else { - res = av; + return float64_maybe_silence_nan(a); } - - return make_float64(res); } #ifdef FLOATX80 @@ -557,13 +542,7 @@ static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b STATUS_PARAM) aIsSignalingNaN = floatx80_is_signaling_nan( a ); bIsQuietNaN = floatx80_is_quiet_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 (a.low < b.low) { @@ -576,9 +555,9 @@ static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b STATUS_PARAM) if (pickNaN(aIsQuietNaN, aIsSignalingNaN, bIsQuietNaN, bIsSignalingNaN, aIsLargerSignificand)) { - return b; + return floatx80_maybe_silence_nan(b); } else { - return a; + return floatx80_maybe_silence_nan(a); } } @@ -708,13 +687,7 @@ static float128 propagateFloat128NaN( float128 a, float128 b STATUS_PARAM) aIsSignalingNaN = float128_is_signaling_nan( a ); bIsQuietNaN = float128_is_quiet_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 (lt128(a.high<<1, a.low, b.high<<1, b.low)) { @@ -727,9 +700,9 @@ static float128 propagateFloat128NaN( float128 a, float128 b STATUS_PARAM) if (pickNaN(aIsQuietNaN, aIsSignalingNaN, bIsQuietNaN, bIsSignalingNaN, aIsLargerSignificand)) { - return b; + return float128_maybe_silence_nan(b); } else { - return a; + return float128_maybe_silence_nan(a); } } |