Add new prefix flag

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4794 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/Target/X86/X86InstrInfo.h b/lib/Target/X86/X86InstrInfo.h
index 65536818bf..a0454a652c 100644
--- a/lib/Target/X86/X86InstrInfo.h
+++ b/lib/Target/X86/X86InstrInfo.h
@@ -65,6 +65,11 @@ namespace X86II {
     // TB - TwoByte - Set if this instruction has a two byte opcode, which
     // starts with a 0x0F byte before the real opcode.
     TB          = 1 << 4,
+
+    // OpSize - Set if this instruction requires an operand size prefix (0x66),
+    // which most often indicates that the instruction operates on 16 bit data
+    // instead of 32 bit data.
+    OpSize      = 1 << 5,
   };
 }