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x64Emitter: Add the MOVBE instruction.

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This commit is contained in:
Pierre Bourdon
2014-03-16 03:43:12 +01:00
parent d2de1ddabc
commit b2597739ff
2 changed files with 35 additions and 0 deletions
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32
Source/Core/Common/x64Emitter.cpp
View File

@ -804,6 +804,38 @@ void XEmitter::MOVZX(int dbits, int sbits, X64Reg dest, OpArg src)
src.WriteRest(this); src.WriteRest(this);
} }
void XEmitter::MOVBE(int bits, const OpArg& dest, const OpArg& src)
{
_assert_msg_(DYNA_REC, cpu_info.bMOVBE, "Generating MOVBE on a system that does not support it.");
if (bits == 8)
{
MOV(bits, dest, src);
return;
}
if (bits == 16)
Write8(0x66);
if (dest.IsSimpleReg())
{
_assert_msg_(DYNA_REC, !src.IsSimpleReg() && !src.IsImm(), "MOVBE: Loading from !mem");
src.WriteRex(this, bits, bits, dest.GetSimpleReg());
Write8(0x0F); Write8(0x38); Write8(0xF0);
src.WriteRest(this, 0, dest.GetSimpleReg());
}
else if (src.IsSimpleReg())
{
_assert_msg_(DYNA_REC, !dest.IsSimpleReg() && !dest.IsImm(), "MOVBE: Storing to !mem");
dest.WriteRex(this, bits, bits, src.GetSimpleReg());
Write8(0x0F); Write8(0x38); Write8(0xF1);
dest.WriteRest(this, 0, src.GetSimpleReg());
}
else
{
_assert_msg_(DYNA_REC, 0, "MOVBE: Not loading or storing to mem");
}
}
void XEmitter::LEA(int bits, X64Reg dest, OpArg src) void XEmitter::LEA(int bits, X64Reg dest, OpArg src)
{ {

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

@ -427,6 +427,9 @@ public:
void MOVSX(int dbits, int sbits, X64Reg dest, OpArg src); //automatically uses MOVSXD if necessary void MOVSX(int dbits, int sbits, X64Reg dest, OpArg src); //automatically uses MOVSXD if necessary
void MOVZX(int dbits, int sbits, X64Reg dest, OpArg src); void MOVZX(int dbits, int sbits, X64Reg dest, OpArg src);
// Available only on Atom or >= Haswell so far. Test with cpu_info.bMOVBE.
void MOVBE(int dbits, const OpArg& dest, const OpArg& src);
// WARNING - These two take 11-13 cycles and are VectorPath! (AMD64) // WARNING - These two take 11-13 cycles and are VectorPath! (AMD64)
void STMXCSR(OpArg memloc); void STMXCSR(OpArg memloc);
void LDMXCSR(OpArg memloc); void LDMXCSR(OpArg memloc);