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| author | Anton Korobeynikov <asl@math.spbu.ru> | 2008-10-11 19:09:15 +0000 |
|---|---|---|
| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2008-10-11 19:09:15 +0000 |
| commit | ef93cecd80ebdecb0ea2b2c316370998151308e2 (patch) | |
| tree | 76f2a76d2e54855b6868f413cd463c8b2288c000 /lib/Target/X86/X86CodeEmitter.cpp | |
| parent | b7dfaf955b7fc5dfa72514d7e5427939d33a5033 (diff) | |
Add ability to override segment (mostly for code emitter purposes).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57380 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86CodeEmitter.cpp')
| -rw-r--r-- | lib/Target/X86/X86CodeEmitter.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp index 37c1e99aeb..16124fa8a8 100644 --- a/lib/Target/X86/X86CodeEmitter.cpp +++ b/lib/Target/X86/X86CodeEmitter.cpp @@ -412,6 +412,16 @@ void Emitter::emitInstruction(const MachineInstr &MI, // Emit the lock opcode prefix as needed. if (Desc->TSFlags & X86II::LOCK) MCE.emitByte(0xF0); + // Emit segment overrid opcode prefix as needed. + switch (Desc->TSFlags & X86II::SegOvrMask) { + case X86II::FS: + MCE.emitByte(0x64); + break; + case X86II::GS: + MCE.emitByte(0x65); + break; + } + // Emit the repeat opcode prefix as needed. if ((Desc->TSFlags & X86II::Op0Mask) == X86II::REP) MCE.emitByte(0xF3); |