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JIT64: faster implementation of mtcrf and mcrxr

This commit is contained in:
Fiora 2014-08-06 09:17:10 -04:00
parent c936984c96
commit 1cb50c9609
1 changed files with 30 additions and 73 deletions
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101
Source/Core/Core/PowerPC/Jit64/Jit_SystemRegisters.cpp
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@ -284,6 +284,15 @@ void Jit64::mfcr(UGeckoInstruction inst)
gpr.UnlockAllX();
}
// convert flags into 64-bit CR values with a lookup table
static const u64 m_crTable[16] =
{
PPCCRToInternal(0x0), PPCCRToInternal(0x1), PPCCRToInternal(0x2), PPCCRToInternal(0x3),
PPCCRToInternal(0x4), PPCCRToInternal(0x5), PPCCRToInternal(0x6), PPCCRToInternal(0x7),
PPCCRToInternal(0x8), PPCCRToInternal(0x9), PPCCRToInternal(0xA), PPCCRToInternal(0xB),
PPCCRToInternal(0xC), PPCCRToInternal(0xD), PPCCRToInternal(0xE), PPCCRToInternal(0xF),
};
void Jit64::mtcrf(UGeckoInstruction inst)
{
INSTRUCTION_START
@ -300,59 +309,37 @@ void Jit64::mtcrf(UGeckoInstruction inst)
if ((crm & (0x80 >> i)) != 0)
{
u8 newcr = (gpr.R(inst.RS).offset >> (28 - (i * 4))) & 0xF;
MOV(64, R(RAX), Imm64(PPCCRToInternal(newcr)));
u64 newcrval = PPCCRToInternal(newcr);
if ((s64)newcrval == (s32)newcrval)
{
MOV(64, M(&PowerPC::ppcState.cr_val[i]), Imm32(newcrval));
}
else
{
MOV(64, R(RAX), Imm64(newcrval));
MOV(64, M(&PowerPC::ppcState.cr_val[i]), R(RAX));
}
}
}
}
else
{
gpr.Lock(inst.RS);
gpr.BindToRegister(inst.RS, true, false);
gpr.FlushLockX(ABI_PARAM1, ABI_PARAM2);
for (int i = 0; i < 8; i++)
{
if ((crm & (0x80 >> i)) != 0)
{
MOVZX(64, 32, EAX, gpr.R(inst.RS));
SHR(64, R(EAX), Imm8(28 - (i * 4)));
AND(64, R(EAX), Imm32(0xF));
X64Reg cr_val = ABI_PARAM1;
X64Reg tmp = ABI_PARAM2;
MOV(64, R(cr_val), Imm64(1ull << 32));
// SO
MOV(64, R(tmp), R(EAX));
SHL(64, R(tmp), Imm8(63));
SHR(64, R(tmp), Imm8(63 - 61));
OR(64, R(cr_val), R(tmp));
// EQ
MOV(64, R(tmp), R(EAX));
NOT(64, R(tmp));
AND(64, R(tmp), Imm8(CR_EQ));
OR(64, R(cr_val), R(tmp));
// GT
MOV(64, R(tmp), R(EAX));
NOT(64, R(tmp));
AND(64, R(tmp), Imm8(CR_GT));
SHL(64, R(tmp), Imm8(63 - 2));
OR(64, R(cr_val), R(tmp));
// LT
MOV(64, R(tmp), R(EAX));
AND(64, R(tmp), Imm8(CR_LT));
SHL(64, R(tmp), Imm8(62 - 3));
OR(64, R(cr_val), R(tmp));
MOV(64, M(&PowerPC::ppcState.cr_val[i]), R(cr_val));
MOV(32, R(EAX), gpr.R(inst.RS));
if (i != 7)
SHR(32, R(EAX), Imm8(28 - (i * 4)));
if (i != 0)
AND(32, R(EAX), Imm8(0xF));
MOV(64, R(EAX), MScaled(EAX, SCALE_8, (u32)(u64)m_crTable));
MOV(64, M(&PowerPC::ppcState.cr_val[i]), R(EAX));
}
}
gpr.UnlockAll();
gpr.UnlockAllX();
}
}
}
@ -378,41 +365,11 @@ void Jit64::mcrxr(UGeckoInstruction inst)
// USES_CR
// Copy XER[0-3] into CR[inst.CRFD]
MOVZX(64, 32, EAX, M(&PowerPC::ppcState.spr[SPR_XER]));
SHR(64, R(EAX), Imm8(28));
MOV(32, R(EAX), M(&PowerPC::ppcState.spr[SPR_XER]));
SHR(32, R(EAX), Imm8(28));
gpr.FlushLockX(ABI_PARAM1, ABI_PARAM2);
X64Reg cr_val = ABI_PARAM1;
X64Reg tmp = ABI_PARAM2;
MOV(64, R(cr_val), Imm64(1ull << 32));
// SO
MOV(64, R(tmp), R(EAX));
SHL(64, R(tmp), Imm8(63));
SHR(64, R(tmp), Imm8(63 - 61));
OR(64, R(cr_val), R(tmp));
// EQ
MOV(64, R(tmp), R(EAX));
AND(64, R(tmp), Imm8(0x2));
OR(64, R(cr_val), R(tmp));
// GT
MOV(64, R(tmp), R(EAX));
NOT(64, R(tmp));
AND(64, R(tmp), Imm8(0x4));
SHL(64, R(tmp), Imm8(63 - 2));
OR(64, R(cr_val), R(tmp));
// LT
MOV(64, R(tmp), R(EAX));
AND(64, R(tmp), Imm8(0x8));
SHL(64, R(tmp), Imm8(62 - 3));
OR(64, R(cr_val), R(tmp));
MOV(64, M(&PowerPC::ppcState.cr_val[inst.CRFD]), R(cr_val));
gpr.UnlockAllX();
MOV(64, R(EAX), MScaled(EAX, SCALE_8, (u32)(u64)m_crTable));
MOV(64, M(&PowerPC::ppcState.cr_val[inst.CRFD]), R(EAX));
// Clear XER[0-3]
AND(32, M(&PowerPC::ppcState.spr[SPR_XER]), Imm32(0x0FFFFFFF));