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Add JITTed version of subfex, disabled for now since it requires us to set the CR0 flag correctly, which I currently don't have working with 64bit build. It will improve performance in RE0 which will be nice. Can probably be done more efficiently as well

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5180 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Sonicadvance1 2010-03-09 21:22:09 +00:00
parent 2049caa9fc
commit 3754bf5d06
1 changed files with 64 additions and 11 deletions
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75
Source/Core/Core/Src/PowerPC/Jit64/Jit_Integer.cpp
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@ -403,19 +403,72 @@ void Jit64::subfcx(UGeckoInstruction inst)
void Jit64::subfex(UGeckoInstruction inst)
{
INSTRUCTION_START;
INSTRUCTION_START;
JITDISABLE(Integer)
Default(inst);
return;
/*
u32 a = m_GPR[_inst.RA];
u32 b = m_GPR[_inst.RB];
int carry = GetCarry();
m_GPR[_inst.RD] = (~a) + b + carry;
SetCarry(Helper_Carry(~a, b) || Helper_Carry((~a) + b, carry));
if (_inst.OE) PanicAlert("OE: subfcx");
if (_inst.Rc) Helper_UpdateCR0(m_GPR[_inst.RD]);
*/
int a = inst.RA, b = inst.RB, d = inst.RD;
gpr.FlushLockX(ECX);
gpr.Lock(a, b, d);
if(d != a && d != b)
gpr.LoadToX64(d, false, true);
else
gpr.LoadToX64(d, true, true);
MOV(32, R(EAX), gpr.R(b));
SUB(32, R(EAX), gpr.R(a));
MOV(32, gpr.R(d), R(EAX));
MOV(32, R(EAX), gpr.R(a));
MOV(32, R(ECX), gpr.R(b));
CMP(32, R(EAX), Imm8(0));
FixupBranch cpLesser = J_CC(CC_L);
FixupBranch cpGreater = J_CC(CC_G);
// Equal
JitSetCA();
FixupBranch continue1 = J();
// Lesser and greater
SetJumpTarget(cpGreater);
SetJumpTarget(cpLesser);
NEG(32, R(EAX));
NOT(32, R(ECX));
CMP(32, R(EAX), R(ECX));
FixupBranch pLesser = J_CC(CC_L);
FixupBranch pGreater = J_CC(CC_G);
// Equal
JitClearCA();
FixupBranch continue2 = J();
// Greater
SetJumpTarget(pGreater);
JitSetCA();
FixupBranch continue3 = J();
// Less than
SetJumpTarget(pLesser);
JitClearCA();
SetJumpTarget(continue1);
SetJumpTarget(continue2);
SetJumpTarget(continue3);
gpr.UnlockAll();
gpr.UnlockAllX();
if (inst.OE) PanicAlert("OE: subfcx");
if (inst.Rc) {
MOV(32, R(EAX), gpr.R(d));
CALL((u8*)asm_routines.computeRc);
// Doesn't yet work for 64bit machines
//CALL((u8*)asm_routines.computeCr);
}
}
void Jit64::subfx(UGeckoInstruction inst)