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Jit64: some byte-swapping changes

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This commit is contained in:
Tillmann Karras
2015-08-21 21:49:09 +02:00
parent 6015e2d812
commit ee4a12ffe2
5 changed files with 69 additions and 103 deletions
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45
Source/Core/Common/x64Emitter.cpp
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@ -887,21 +887,46 @@ void XEmitter::WriteMOVBE(int bits, u8 op, X64Reg reg, const OpArg& arg)
void XEmitter::MOVBE(int bits, X64Reg dest, const OpArg& src) {WriteMOVBE(bits, 0xF0, dest, src);}
void XEmitter::MOVBE(int bits, const OpArg& dest, X64Reg src) {WriteMOVBE(bits, 0xF1, src, dest);}
void XEmitter::LoadAndSwap(int size, X64Reg dst, const OpArg& src)
void XEmitter::LoadAndSwap(int size, X64Reg dst, const OpArg& src, bool sign_extend)
{
if (cpu_info.bMOVBE)
switch (size)
{
MOVBE(size, dst, src);
}
else
{
MOV(size, R(dst), src);
BSWAP(size, dst);
case 8:
if (sign_extend)
MOVSX(32, 8, dst, src);
else
MOVZX(32, 8, dst, src);
break;
case 16:
MOVZX(32, 16, dst, src);
if (sign_extend)
{
BSWAP(32, dst);
SAR(32, R(dst), Imm8(16));
}
else
{
ROL(16, R(dst), Imm8(8));
}
break;
case 32:
case 64:
if (cpu_info.bMOVBE)
{
MOVBE(size, dst, src);
}
else
{
MOV(size, R(dst), src);
BSWAP(size, dst);
}
break;
}
}
void XEmitter::SwapAndStore(int size, const OpArg& dst, X64Reg src)
u8* XEmitter::SwapAndStore(int size, const OpArg& dst, X64Reg src)
{
u8* mov_location = GetWritableCodePtr();
if (cpu_info.bMOVBE)
{
MOVBE(size, dst, src);
@ -909,8 +934,10 @@ void XEmitter::SwapAndStore(int size, const OpArg& dst, X64Reg src)
else
{
BSWAP(size, src);
mov_location = GetWritableCodePtr();
MOV(size, dst, R(src));
}
return mov_location;
}