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JIT: reorder blr comparisons 

This should allow macro-op fusion in blr instructions.
This commit is contained in:
Fiora 2014-10-08 19:41:51 -07:00
parent 7388c62439
commit 5b5e462200
2 changed files with 5 additions and 5 deletions
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4
Source/Core/Core/PowerPC/Jit64/Jit.cpp
View File

@ -414,10 +414,10 @@ void Jit64::WriteBLRExit()
bool disturbed = Cleanup();
if (disturbed)
MOV(32, R(RSCRATCH), PPCSTATE(pc));
MOV(32, R(RSCRATCH2), Imm32(js.downcountAmount));
CMP(64, R(RSCRATCH), MDisp(RSP, 8));
MOV(32, R(RSCRATCH), Imm32(js.downcountAmount));
J_CC(CC_NE, asm_routines.dispatcherMispredictedBLR);
SUB(32, PPCSTATE(downcount), R(RSCRATCH));
SUB(32, PPCSTATE(downcount), R(RSCRATCH2));
RET();
}

6
Source/Core/Core/PowerPC/Jit64/JitAsm.cpp
View File

@ -52,14 +52,14 @@ void Jit64AsmRoutineManager::Generate()
#if 0 // debug mispredicts
MOV(32, R(ABI_PARAM1), MDisp(RSP, 8)); // guessed_pc
ABI_PushRegistersAndAdjustStack(1 << RSCRATCH, 0);
ABI_PushRegistersAndAdjustStack(1 << RSCRATCH2, 0);
CALL(reinterpret_cast<void *>(&ReportMispredict));
ABI_PopRegistersAndAdjustStack(1 << RSCRATCH, 0);
ABI_PopRegistersAndAdjustStack(1 << RSCRATCH2, 0);
#endif
ResetStack();
SUB(32, PPCSTATE(downcount), R(RSCRATCH));
SUB(32, PPCSTATE(downcount), R(RSCRATCH2));
dispatcher = GetCodePtr();
// The result of slice decrementation should be in flags if somebody jumped here