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fprem fix

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This commit is contained in:
Stanislav Shwartsman 2009-06-04 15:53:41 +00:00
parent e260f4c3cb
commit 2f4cc84f0e
1 changed files with 8 additions and 4 deletions
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12
bochs/fpu/fprem.cc
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@ -66,9 +66,7 @@ static floatx80 do_fprem(floatx80 a, floatx80 b, Bit64u &q, int rounding_mode, f
bExp = extractFloatx80Exp(b);
if (aExp == 0x7FFF) {
if ((Bit64u) (aSig0<<1)
|| ((bExp == 0x7FFF) && (Bit64u) (bSig<<1)))
{
if ((Bit64u) (aSig0<<1) || ((bExp == 0x7FFF) && (Bit64u) (bSig<<1))) {
return propagateFloatx80NaN(a, b, status);
}
float_raise(status, float_flag_invalid);
@ -76,6 +74,12 @@ static floatx80 do_fprem(floatx80 a, floatx80 b, Bit64u &q, int rounding_mode, f
}
if (bExp == 0x7FFF) {
if ((Bit64u) (bSig<<1)) return propagateFloatx80NaN(a, b, status);
if (aExp == 0 && aSig0) {
float_raise(status, float_flag_denormal);
normalizeFloatx80Subnormal(aSig0, &aExp, &aSig0);
return (a.fraction & BX_CONST64(0x8000000000000000)) ?
packFloatx80(aSign, aExp, aSig0) : a;
}
return a;
}
if (bExp == 0) {
@ -87,7 +91,7 @@ static floatx80 do_fprem(floatx80 a, floatx80 b, Bit64u &q, int rounding_mode, f
normalizeFloatx80Subnormal(bSig, &bExp, &bSig);
}
if (aExp == 0) {
if ((Bit64u) (aSig0<<1) == 0) return a;
if (aSig0 == 0) return a;
float_raise(status, float_flag_denormal);
normalizeFloatx80Subnormal(aSig0, &aExp, &aSig0);
}