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jit: Update rounding mode immediately on ctc1.

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Unknown W. Brackets 2014-08-30 23:48:27 -07:00
parent e8cdbcc33f
commit 5f6f6827b5
2 changed files with 15 additions and 16 deletions
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24
Core/MIPS/ARM/ArmCompFPU.cpp
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@ -406,23 +406,7 @@ void Jit::Comp_mxc1(MIPSOpcode op)
} else {
gpr.MapDirtyIn(MIPS_REG_FPCOND, rt);
}
// Hardware rounding method.
// Left here in case it is faster than conditional method.
/*
AND(SCRATCHREG1, gpr.R(rt), Operand2(3));
// MIPS Rounding Mode <-> ARM Rounding Mode
// 0, 1, 2, 3 <-> 0, 3, 1, 2
CMP(SCRATCHREG1, Operand2(1));
SetCC(CC_EQ); ADD(SCRATCHREG1, SCRATCHREG1, Operand2(2));
SetCC(CC_GT); SUB(SCRATCHREG1, SCRATCHREG1, Operand2(1));
SetCC(CC_AL);
// Load and Store RM to FPSCR
VMRS(SCRATCHREG2);
BIC(SCRATCHREG2, SCRATCHREG2, Operand2(0x3 << 22));
ORR(SCRATCHREG2, SCRATCHREG2, Operand2(SCRATCHREG1, ST_LSL, 22));
VMSR(SCRATCHREG2);
*/
// Update MIPS state
// TODO: Technically, should mask by 0x0181FFFF. Maybe just put all of FCR31 in the reg?
STR(gpr.R(rt), CTXREG, offsetof(MIPSState, fcr31));
@ -433,6 +417,14 @@ void Jit::Comp_mxc1(MIPSOpcode op)
MOV(SCRATCHREG1, Operand2(gpr.R(rt), ST_LSR, 23));
AND(gpr.R(MIPS_REG_FPCOND), SCRATCHREG1, Operand2(1));
#endif
SetRoundingMode();
} else {
if ((gpr.GetImm(rt) & 3) == 0) {
// Default nearest mode, let's do this the fast way.
ClearRoundingMode();
} else {
SetRoundingMode();
}
}
} else {
Comp_Generic(op);

7
Core/MIPS/x86/CompFPU.cpp
View File

@ -383,6 +383,12 @@ void Jit::Comp_mxc1(MIPSOpcode op)
if (gpr.IsImm(rt)) {
gpr.SetImm(MIPS_REG_FPCOND, (gpr.GetImm(rt) >> 23) & 1);
MOV(32, M(&mips_->fcr31), Imm32(gpr.GetImm(rt) & 0x0181FFFF));
if ((gpr.GetImm(rt) & 3) == 0) {
// Default nearest mode, let's do this the fast way.
ClearRoundingMode();
} else {
SetRoundingMode();
}
} else {
gpr.Lock(rt, MIPS_REG_FPCOND);
gpr.MapReg(rt, true, false);
@ -393,6 +399,7 @@ void Jit::Comp_mxc1(MIPSOpcode op)
MOV(32, M(&mips_->fcr31), gpr.R(rt));
AND(32, M(&mips_->fcr31), Imm32(0x0181FFFF));
gpr.UnlockAll();
SetRoundingMode();
}
} else {
Comp_Generic(op);