diff options
| author | comex <comexk@gmail.com> | 2015-04-23 16:34:23 -0400 |
|---|---|---|
| committer | comex <comexk@gmail.com> | 2015-04-23 16:34:23 -0400 |
| commit | b3aaa46d42a8236cfb0ac985378ded8392b29cee (patch) | |
| tree | 7646e2d5dbb396bf8ff5db13291b63c757c41cec /Source/Core/Common | |
| parent | e4b5637c3ac997de162a5fd08a36b4b787cb54d8 (diff) | |
| parent | c19482c9a39f420b769ba9386bd4254fbcb309b9 (diff) | |
Merge pull request #2088 from Sintendo/diecmp
Emit 'TEST reg, reg' for 'CMP reg, 0' automatically
Diffstat (limited to 'Source/Core/Common')
| -rw-r--r-- | Source/Core/Common/x64Emitter.cpp | 12 | ||||
| -rw-r--r-- | Source/Core/Common/x64Emitter.h | 2 |
2 files changed, 14 insertions, 0 deletions
diff --git a/Source/Core/Common/x64Emitter.cpp b/Source/Core/Common/x64Emitter.cpp index 277443efca..0219f9798a 100644 --- a/Source/Core/Common/x64Emitter.cpp +++ b/Source/Core/Common/x64Emitter.cpp @@ -1274,6 +1274,18 @@ void XEmitter::MOV (int bits, const OpArg &a1, const OpArg &a2) void XEmitter::TEST(int bits, const OpArg &a1, const OpArg &a2) {CheckFlags(); WriteNormalOp(bits, nrmTEST, a1, a2);} void XEmitter::CMP (int bits, const OpArg &a1, const OpArg &a2) {CheckFlags(); WriteNormalOp(bits, nrmCMP, a1, a2);} void XEmitter::XCHG(int bits, const OpArg &a1, const OpArg &a2) {WriteNormalOp(bits, nrmXCHG, a1, a2);} +void XEmitter::CMP_or_TEST(int bits, const OpArg &a1, const OpArg &a2) +{ + CheckFlags(); + if (a1.IsSimpleReg() && a2.IsImm() && a2.offset == 0) // turn 'CMP reg, 0' into shorter 'TEST reg, reg' + { + WriteNormalOp(bits, nrmTEST, a1, a1); + } + else + { + WriteNormalOp(bits, nrmCMP, a1, a2); + } +} void XEmitter::IMUL(int bits, X64Reg regOp, OpArg a1, OpArg a2) { diff --git a/Source/Core/Common/x64Emitter.h b/Source/Core/Common/x64Emitter.h index c726fa6cbc..a1bc0301d1 100644 --- a/Source/Core/Common/x64Emitter.h +++ b/Source/Core/Common/x64Emitter.h @@ -484,6 +484,8 @@ public: void MOV (int bits, const OpArg &a1, const OpArg &a2); void TEST(int bits, const OpArg &a1, const OpArg &a2); + void CMP_or_TEST(int bits, const OpArg &a1, const OpArg &a2); + // Are these useful at all? Consider removing. void XCHG(int bits, const OpArg &a1, const OpArg &a2); void XCHG_AHAL(); |