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| author | Devang Patel <dpatel@apple.com> | 2012-01-19 18:40:55 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2012-01-19 18:40:55 +0000 |
| commit | f83dcfd052e07418daa410f08c66101d40c41757 (patch) | |
| tree | ae7fdce0d7122ff31554299808be78f5aefa26e1 /llvm | |
| parent | 2e93a2ad2148d19337bf5f9885e46e3c00e8ab82 (diff) | |
| download | bcm5719-llvm-f83dcfd052e07418daa410f08c66101d40c41757.tar.gz bcm5719-llvm-f83dcfd052e07418daa410f08c66101d40c41757.zip | |
Post process 'and', 'sub' instructions and select better encoding, if available.
llvm-svn: 148489
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp | 78 | ||||
| -rw-r--r-- | llvm/test/MC/X86/intel-syntax-encoding.s | 8 |
2 files changed, 86 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp index 1763419408d..67c4a647e55 100644 --- a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp +++ b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp @@ -1331,6 +1331,84 @@ processInstruction(MCInst &Inst, Inst = TmpInst; return true; } + case X86::ADD16i16: { + if (!Inst.getOperand(0).isImm() || + !isImmSExti16i8Value(Inst.getOperand(0).getImm())) + return false; + + MCInst TmpInst; + TmpInst.setOpcode(X86::ADD16ri8); + TmpInst.addOperand(MCOperand::CreateReg(X86::AX)); + TmpInst.addOperand(MCOperand::CreateReg(X86::AX)); + TmpInst.addOperand(Inst.getOperand(0)); + Inst = TmpInst; + return true; + } + case X86::ADD32i32: { + if (!Inst.getOperand(0).isImm() || + !isImmSExti32i8Value(Inst.getOperand(0).getImm())) + return false; + + MCInst TmpInst; + TmpInst.setOpcode(X86::ADD32ri8); + TmpInst.addOperand(MCOperand::CreateReg(X86::EAX)); + TmpInst.addOperand(MCOperand::CreateReg(X86::EAX)); + TmpInst.addOperand(Inst.getOperand(0)); + Inst = TmpInst; + return true; + } + case X86::ADD64i32: { + if (!Inst.getOperand(0).isImm() || + !isImmSExti64i8Value(Inst.getOperand(0).getImm())) + return false; + + MCInst TmpInst; + TmpInst.setOpcode(X86::ADD64ri8); + TmpInst.addOperand(MCOperand::CreateReg(X86::RAX)); + TmpInst.addOperand(MCOperand::CreateReg(X86::RAX)); + TmpInst.addOperand(Inst.getOperand(0)); + Inst = TmpInst; + return true; + } + case X86::SUB16i16: { + if (!Inst.getOperand(0).isImm() || + !isImmSExti16i8Value(Inst.getOperand(0).getImm())) + return false; + + MCInst TmpInst; + TmpInst.setOpcode(X86::SUB16ri8); + TmpInst.addOperand(MCOperand::CreateReg(X86::AX)); + TmpInst.addOperand(MCOperand::CreateReg(X86::AX)); + TmpInst.addOperand(Inst.getOperand(0)); + Inst = TmpInst; + return true; + } + case X86::SUB32i32: { + if (!Inst.getOperand(0).isImm() || + !isImmSExti32i8Value(Inst.getOperand(0).getImm())) + return false; + + MCInst TmpInst; + TmpInst.setOpcode(X86::SUB32ri8); + TmpInst.addOperand(MCOperand::CreateReg(X86::EAX)); + TmpInst.addOperand(MCOperand::CreateReg(X86::EAX)); + TmpInst.addOperand(Inst.getOperand(0)); + Inst = TmpInst; + return true; + } + case X86::SUB64i32: { + if (!Inst.getOperand(0).isImm() || + !isImmSExti64i8Value(Inst.getOperand(0).getImm())) + return false; + + MCInst TmpInst; + TmpInst.setOpcode(X86::SUB64ri8); + TmpInst.addOperand(MCOperand::CreateReg(X86::RAX)); + TmpInst.addOperand(MCOperand::CreateReg(X86::RAX)); + TmpInst.addOperand(Inst.getOperand(0)); + Inst = TmpInst; + return true; + } } return false; } diff --git a/llvm/test/MC/X86/intel-syntax-encoding.s b/llvm/test/MC/X86/intel-syntax-encoding.s index 23eff016910..c81636bcbbd 100644 --- a/llvm/test/MC/X86/intel-syntax-encoding.s +++ b/llvm/test/MC/X86/intel-syntax-encoding.s @@ -24,3 +24,11 @@ // CHECK: encoding: [0x48,0x89,0x44,0x24,0xf0] mov QWORD PTR [RSP - 16], RAX +// CHECK: encoding: [0x66,0x83,0xc0,0xf4] + add ax, -12 +// CHECK: encoding: [0x83,0xc0,0xf4] + add eax, -12 +// CHECK: encoding: [0x48,0x83,0xc0,0xf4] + add rax, -12 + + |
