diff options
| -rw-r--r-- | fpu/softfloat.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index f164b5c..ab50088 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -5706,7 +5706,7 @@ floatx80 floatx80_modrem(floatx80 a, floatx80 b, bool mod, float_status *status) { bool aSign, zSign; - int32_t aExp, bExp, expDiff; + int32_t aExp, bExp, expDiff, aExpOrig; uint64_t aSig0, aSig1, bSig; uint64_t q, term0, term1, alternateASig0, alternateASig1; @@ -5715,7 +5715,7 @@ floatx80 floatx80_modrem(floatx80 a, floatx80 b, bool mod, return floatx80_default_nan(status); } aSig0 = extractFloatx80Frac( a ); - aExp = extractFloatx80Exp( a ); + aExpOrig = aExp = extractFloatx80Exp( a ); aSign = extractFloatx80Sign( a ); bSig = extractFloatx80Frac( b ); bExp = extractFloatx80Exp( b ); @@ -5730,6 +5730,13 @@ floatx80 floatx80_modrem(floatx80 a, floatx80 b, bool mod, if ((uint64_t)(bSig << 1)) { return propagateFloatx80NaN(a, b, status); } + if (aExp == 0 && aSig0 >> 63) { + /* + * Pseudo-denormal argument must be returned in normalized + * form. + */ + return packFloatx80(aSign, 1, aSig0); + } return a; } if ( bExp == 0 ) { @@ -5749,7 +5756,16 @@ floatx80 floatx80_modrem(floatx80 a, floatx80 b, bool mod, expDiff = aExp - bExp; aSig1 = 0; if ( expDiff < 0 ) { - if ( mod || expDiff < -1 ) return a; + if ( mod || expDiff < -1 ) { + if (aExp == 1 && aExpOrig == 0) { + /* + * Pseudo-denormal argument must be returned in + * normalized form. + */ + return packFloatx80(aSign, aExp, aSig0); + } + return a; + } shift128Right( aSig0, 0, 1, &aSig0, &aSig1 ); expDiff = 0; } |