From 0498b88d4810552fbba36261b76809b18edf0ad3 Mon Sep 17 00:00:00 2001 From: Craig Topper Date: Mon, 18 Mar 2013 03:34:55 +0000 Subject: [PATCH] Post process ADC/SBB and use a shorter encoding if they use a sign extended immediate. llvm-svn: 177243 --- llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp | 6 ++++++ llvm/test/MC/X86/intel-syntax-encoding.s | 14 ++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp index 5f6c110..4ed5534a6 100644 --- a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp +++ b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp @@ -1801,6 +1801,12 @@ processInstruction(MCInst &Inst, case X86::SUB16i16: return convert16i16to16ri8(Inst, X86::SUB16ri8); case X86::SUB32i32: return convert32i32to32ri8(Inst, X86::SUB32ri8); case X86::SUB64i32: return convert64i32to64ri8(Inst, X86::SUB64ri8); + case X86::ADC16i16: return convert16i16to16ri8(Inst, X86::ADC16ri8); + case X86::ADC32i32: return convert32i32to32ri8(Inst, X86::ADC32ri8); + case X86::ADC64i32: return convert64i32to64ri8(Inst, X86::ADC64ri8); + case X86::SBB16i16: return convert16i16to16ri8(Inst, X86::SBB16ri8); + case X86::SBB32i32: return convert32i32to32ri8(Inst, X86::SBB32ri8); + case X86::SBB64i32: return convert64i32to64ri8(Inst, X86::SBB64ri8); } } diff --git a/llvm/test/MC/X86/intel-syntax-encoding.s b/llvm/test/MC/X86/intel-syntax-encoding.s index 1350364..9806ac3 100644 --- a/llvm/test/MC/X86/intel-syntax-encoding.s +++ b/llvm/test/MC/X86/intel-syntax-encoding.s @@ -31,6 +31,20 @@ // CHECK: encoding: [0x48,0x83,0xc0,0xf4] add rax, -12 +// CHECK: encoding: [0x66,0x83,0xd0,0xf4] + adc ax, -12 +// CHECK: encoding: [0x83,0xd0,0xf4] + adc eax, -12 +// CHECK: encoding: [0x48,0x83,0xd0,0xf4] + adc rax, -12 + +// CHECK: encoding: [0x66,0x83,0xd8,0xf4] + sbb ax, -12 +// CHECK: encoding: [0x83,0xd8,0xf4] + sbb eax, -12 +// CHECK: encoding: [0x48,0x83,0xd8,0xf4] + sbb rax, -12 + // CHECK: encoding: [0x66,0x83,0xf8,0xf4] cmp ax, -12 // CHECK: encoding: [0x83,0xf8,0xf4] -- 2.7.4