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mips3drc: Generate -0.0 for NEG.S/D of 0.0 as FNEG does not on x86 [MooglyGuy]

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mooglyguy 2014-11-03 11:10:35 +01:00
parent f1af40c4d7
commit 583ee09cf4
1 changed files with 8 additions and 0 deletions
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8
src/emu/cpu/mips/mips3drc.c
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@ -2764,9 +2764,17 @@ int mips3_device::generate_cop1(drcuml_block *block, compiler_state *compiler, c
case 0x07:
if (IS_SINGLE(op)) /* NEG.S - MIPS I */
{
UML_FSNEG(block, FPR32(FDREG), FPR32(FSREG)); // fsneg <fdreg>,<fsreg>
UML_CMP(block, FPR32(FSREG), 0); // cmp <fsreg>,0.0
UML_MOVc(block, COND_E, FPR32(FDREG), 0x80000000); // mov <fdreg>,-0.0,e
}
else /* NEG.D - MIPS I */
{
UML_FDNEG(block, FPR64(FDREG), FPR64(FSREG)); // fdneg <fdreg>,<fsreg>
UML_CMP(block, FPR64(FSREG), 0); // cmp <fsreg>,0.0
UML_DMOVc(block, COND_E, FPR64(FDREG), 0x8000000000000000L);// dmov <fdreg>,-0.0,e
}
return TRUE;
case 0x08: