piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-07-23 14:19:46 -06:00
Code Issues Packages Projects Releases Wiki Activity

Added emitters for BT/BTR/BTS/BTC x86 instructions, optimized extended arithmetic PowerPC instructions

Browse Source
This commit is contained in:
calc84maniac
2012-01-05 22:36:27 -05:00
parent a7a6a1859e
commit 5a15d58964
4 changed files with 111 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
Source/Core/Common/Src/x64Emitter.cpp
View File

@ -834,6 +834,39 @@ void XEmitter::SHL(int bits, OpArg dest, OpArg shift) {WriteShift(bits, dest, sh
void XEmitter::SHR(int bits, OpArg dest, OpArg shift) {WriteShift(bits, dest, shift, 5);}
void XEmitter::SAR(int bits, OpArg dest, OpArg shift) {WriteShift(bits, dest, shift, 7);}
// index can be either imm8 or register, don't use memory destination because it's slow
void XEmitter::WriteBitTest(int bits, OpArg &dest, OpArg &index, int ext)
{
if (dest.IsImm())
{
_assert_msg_(DYNA_REC, 0, "WriteBitTest - can't test imms");
}
if ((index.IsImm() && index.GetImmBits() != 8))
{
_assert_msg_(DYNA_REC, 0, "WriteBitTest - illegal argument");
}
if (bits == 16) Write8(0x66);
if (index.IsImm())
{
dest.WriteRex(this, bits, bits);
Write8(0x0F); Write8(0xBA);
dest.WriteRest(this, 1, (X64Reg)ext);
Write8((u8)index.offset);
}
else
{
X64Reg operand = index.GetSimpleReg();
dest.WriteRex(this, bits, bits, operand);
Write8(0x0F); Write8(0x83 + 8*ext);
dest.WriteRest(this, 1, operand);
}
}
void XEmitter::BT(int bits, OpArg dest, OpArg index) {WriteBitTest(bits, dest, index, 4);}
void XEmitter::BTS(int bits, OpArg dest, OpArg index) {WriteBitTest(bits, dest, index, 5);}
void XEmitter::BTR(int bits, OpArg dest, OpArg index) {WriteBitTest(bits, dest, index, 6);}
void XEmitter::BTC(int bits, OpArg dest, OpArg index) {WriteBitTest(bits, dest, index, 7);}
void OpArg::WriteSingleByteOp(XEmitter *emit, u8 op, X64Reg _operandReg, int bits)
{
if (bits == 16)