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x64ABI: enhance MOVTwo to take an offset

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This lets us merge displacements into MOVTwo in trampolines.
This commit is contained in:
Fiora
2015-01-02 15:32:23 -08:00
parent 2a8936312e
commit 53b44ccb3a
3 changed files with 25 additions and 16 deletions
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18
Source/Core/Common/x64ABI.cpp
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@ -181,20 +181,26 @@ void XEmitter::ABI_CallFunctionR(const void *func, X64Reg reg1)
// Pass two registers as parameters.
void XEmitter::ABI_CallFunctionRR(const void *func, X64Reg reg1, X64Reg reg2)
{
MOVTwo(64, ABI_PARAM1, reg1, ABI_PARAM2, reg2);
MOVTwo(64, ABI_PARAM1, reg1, 0, ABI_PARAM2, reg2);
ABI_CallFunction(func);
}
void XEmitter::MOVTwo(int bits, Gen::X64Reg dst1, Gen::X64Reg src1, Gen::X64Reg dst2, Gen::X64Reg src2)
void XEmitter::MOVTwo(int bits, Gen::X64Reg dst1, Gen::X64Reg src1, s32 offset1, Gen::X64Reg dst2, Gen::X64Reg src2)
{
if (dst1 == src2 && dst2 == src1)
{
XCHG(bits, R(src1), R(src2));
if (offset1)
ADD(bits, R(dst1), Imm32(offset1));
}
else if (src2 != dst1)
{
if (dst1 != src1)
if (dst1 != src1 && offset1)
LEA(bits, dst1, MDisp(src1, offset1));
else if (dst1 != src1)
MOV(bits, R(dst1), R(src1));
else if (offset1)
ADD(bits, R(dst1), Imm32(offset1));
if (dst2 != src2)
MOV(bits, R(dst2), R(src2));
}
@ -202,8 +208,12 @@ void XEmitter::MOVTwo(int bits, Gen::X64Reg dst1, Gen::X64Reg src1, Gen::X64Reg
{
if (dst2 != src2)
MOV(bits, R(dst2), R(src2));
if (dst1 != src1)
if (dst1 != src1 && offset1)
LEA(bits, dst1, MDisp(src1, offset1));
else if (dst1 != src1)
MOV(bits, R(dst1), R(src1));
else if (offset1)
ADD(bits, R(dst1), Imm32(offset1));
}
}