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Factor code from ABI_CallFunctionRR and GetWriteTrampoline into a helper, and fix a special case.

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The special case is where the registers are actually to be swapped (i.e.
func(ABI_PARAM2, ABI_PARAM1); this was previously impossible but would
be ugly not to handle anyway.
This commit is contained in:
comex 2014-09-04 01:02:21 -04:00
parent 487eb967eb
commit 67cdb6e07a
3 changed files with 29 additions and 30 deletions
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39
Source/Core/Common/x64ABI.cpp
View file

@ -353,20 +353,7 @@ void XEmitter::ABI_CallFunctionR(void *func, X64Reg reg1)
void XEmitter::ABI_CallFunctionRR(void *func, X64Reg reg1, X64Reg reg2, bool noProlog)
{
ABI_AlignStack(0, noProlog);
if (reg2 != ABI_PARAM1)
{
if (reg1 != ABI_PARAM1)
MOV(64, R(ABI_PARAM1), R(reg1));
if (reg2 != ABI_PARAM2)
MOV(64, R(ABI_PARAM2), R(reg2));
}
else
{
if (reg2 != ABI_PARAM2)
MOV(64, R(ABI_PARAM2), R(reg2));
if (reg1 != ABI_PARAM1)
MOV(64, R(ABI_PARAM1), R(reg1));
}
MOVTwo(64, ABI_PARAM1, reg1, ABI_PARAM2, reg2, ABI_PARAM3);
u64 distance = u64(func) - (u64(code) + 5);
if (distance >= 0x0000000080000000ULL &&
distance < 0xFFFFFFFF80000000ULL)
@ -382,6 +369,30 @@ void XEmitter::ABI_CallFunctionRR(void *func, X64Reg reg1, X64Reg reg2, bool noP
ABI_RestoreStack(0, noProlog);
}
void XEmitter::MOVTwo(int bits, Gen::X64Reg dst1, Gen::X64Reg src1, Gen::X64Reg dst2, Gen::X64Reg src2, X64Reg temp)
{
if (dst1 == src2 && dst2 == src1)
{
// need a temporary
MOV(bits, R(temp), R(src1));
src1 = temp;
}
if (src2 != dst1)
{
if (dst1 != src1)
MOV(bits, R(dst1), R(src1));
if (dst2 != src2)
MOV(bits, R(dst2), R(src2));
}
else
{
if (dst2 != src2)
MOV(bits, R(dst2), R(src2));
if (dst1 != src1)
MOV(bits, R(dst1), R(src1));
}
}
void XEmitter::ABI_CallFunctionAC(void *func, const Gen::OpArg &arg1, u32 param2)
{
ABI_AlignStack(0);

3
Source/Core/Common/x64Emitter.h
View file

@ -753,6 +753,9 @@ public:
void ABI_CallFunctionR(void *func, X64Reg reg1);
void ABI_CallFunctionRR(void *func, X64Reg reg1, X64Reg reg2, bool noProlog = false);
// Helper method for the above, or can be used separately.
void MOVTwo(int bits, Gen::X64Reg dst1, Gen::X64Reg src1, Gen::X64Reg dst2, Gen::X64Reg src2, Gen::X64Reg temp);
// A function that doesn't have any control over what it will do to regs,
// such as the dispatcher, should be surrounded by these.
void ABI_PushAllCalleeSavedRegsAndAdjustStack();

17
Source/Core/Core/PowerPC/JitCommon/JitBackpatch.cpp
View file

@ -115,22 +115,7 @@ const u8 *TrampolineCache::GetWriteTrampoline(const InstructionInfo &info, u32 r
// PC is used by memory watchpoints (if enabled) or to print accurate PC locations in debug logs
MOV(32, PPCSTATE(pc), Imm32(pc));
if (dataReg == ABI_PARAM2)
PanicAlert("Incorrect use of SafeWriteRegToReg");
if (addrReg != ABI_PARAM1)
{
if (ABI_PARAM1 != dataReg)
MOV(64, R(ABI_PARAM1), R((X64Reg)dataReg));
if (ABI_PARAM2 != addrReg)
MOV(64, R(ABI_PARAM2), R((X64Reg)addrReg));
}
else
{
if (ABI_PARAM2 != addrReg)
MOV(64, R(ABI_PARAM2), R((X64Reg)addrReg));
if (ABI_PARAM1 != dataReg)
MOV(64, R(ABI_PARAM1), R((X64Reg)dataReg));
}
MOVTwo(64, ABI_PARAM1, dataReg, ABI_PARAM2, addrReg, ABI_PARAM3);
if (info.displacement)
{