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JIT: this should remove bclrx from TD's profiles...

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3861 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard
2009-07-20 19:48:45 +00:00
parent 2569ca60c0
commit a1904ba721
1 changed files with 30 additions and 3 deletions
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33
Source/Core/Core/Src/PowerPC/Jit64/Jit_Branch.cpp
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@ -263,15 +263,15 @@ void Jit64::bcctrx(UGeckoInstruction inst)
void Jit64::bclrx(UGeckoInstruction inst) void Jit64::bclrx(UGeckoInstruction inst)
{ {
if(Core::g_CoreStartupParameter.bJITOff || Core::g_CoreStartupParameter.bJITBranchOff) if (Core::g_CoreStartupParameter.bJITOff || Core::g_CoreStartupParameter.bJITBranchOff)
{Default(inst); return;} // turn off from debugger {Default(inst); return;} // turn off from debugger
INSTRUCTION_START; INSTRUCTION_START;
gpr.Flush(FLUSH_ALL); gpr.Flush(FLUSH_ALL);
fpr.Flush(FLUSH_ALL); fpr.Flush(FLUSH_ALL);
//Special case BLR //Special case BLR & BLRL
if (inst.hex == 0x4e800020) if ((inst.hex & ~1) == 0x4e800020)
{ {
//CDynaRegCache::Flush(); //CDynaRegCache::Flush();
// This below line can be used to prove that blr "eats flags" in practice. // This below line can be used to prove that blr "eats flags" in practice.
@ -281,6 +281,33 @@ void Jit64::bclrx(UGeckoInstruction inst)
#endif #endif
MOV(32, R(EAX), M(&LR)); MOV(32, R(EAX), M(&LR));
MOV(32, M(&PC), R(EAX)); MOV(32, M(&PC), R(EAX));
if (inst.LK)
MOV(32, M(&LR), Imm32(js.compilerPC + 4)); // LR = PC + 4;
WriteExitDestInEAX(0);
return;
} else if ((inst.BO & 4) == 0) {
// Decrement CTR?? in bclrx?? this goes to fallback.
} else if ((inst.BO & 16) == 0) {
// Test a CR bit. Not too hard.
// beqlr- 4d820020
// blelr- 4c810020
// blrl 4e800021
// bnelr 4c820020
// etc...
TEST(8, M(&PowerPC::ppcState.cr_fast[inst.BI >> 2]), Imm8(8 >> (inst.BI & 3)));
Gen::CCFlags branch;
if (inst.BO & 8)
branch = CC_Z;
else
branch = CC_NZ;
MOV(32, R(EAX), Imm32(js.compilerPC + 4));
FixupBranch b = J_CC(branch, false);
MOV(32, R(EAX), M(&LR));
MOV(32, M(&PC), R(EAX));
if (inst.LK)
MOV(32, M(&LR), Imm32(js.compilerPC + 4)); // LR = PC + 4;
// Would really like to continue the block here, but it ends. TODO.
SetJumpTarget(b);
WriteExitDestInEAX(0); WriteExitDestInEAX(0);
return; return;
} }