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authorEvan Cheng <evan.cheng@apple.com>2006-02-14 21:52:51 +0000
committerEvan Cheng <evan.cheng@apple.com>2006-02-14 21:52:51 +0000
commitee50a1ae27a9d50dc292ef7ae9a902a9bdd1a1b4 (patch)
tree473df8cf0d3dd78cda78b94f2cb6a14399f49a36 /lib/Target/X86/X86CodeEmitter.cpp
parent576c1419215b9f3b421ab74ff97acb3f2503c904 (diff)
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Don't special case XS, XD prefixes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26183 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86CodeEmitter.cpp')
-rw-r--r--lib/Target/X86/X86CodeEmitter.cpp23
1 files changed, 9 insertions, 14 deletions
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp
index 5ef53d3..5208f52 100644
--- a/lib/Target/X86/X86CodeEmitter.cpp
+++ b/lib/Target/X86/X86CodeEmitter.cpp
@@ -362,30 +362,25 @@ void Emitter::emitInstruction(const MachineInstr &MI) {
// Emit the operand size opcode prefix as needed.
if (Desc.TSFlags & X86II::OpSize) MCE.emitByte(0x66);
- // Emit the double precision sse fp opcode prefix as needed.
- if ((Desc.TSFlags & X86II::Op0Mask) == X86II::XD) {
- MCE.emitByte(0xF2); MCE.emitByte(0x0F);
- }
-
- // Emit the double precision sse fp opcode prefix as needed.
- if ((Desc.TSFlags & X86II::Op0Mask) == X86II::XS) {
- MCE.emitByte(0xF3); MCE.emitByte(0x0F);
- }
-
switch (Desc.TSFlags & X86II::Op0Mask) {
case X86II::TB:
MCE.emitByte(0x0F); // Two-byte opcode prefix
break;
+ case X86II::REP: break; // already handled.
+ case X86II::XS: // F3 0F
+ MCE.emitByte(0xF3);
+ MCE.emitByte(0x0F);
+ break;
+ case X86II::XD: // F2 0F
+ MCE.emitByte(0xF2);
+ MCE.emitByte(0x0F);
+ break;
case X86II::D8: case X86II::D9: case X86II::DA: case X86II::DB:
case X86II::DC: case X86II::DD: case X86II::DE: case X86II::DF:
MCE.emitByte(0xD8+
(((Desc.TSFlags & X86II::Op0Mask)-X86II::D8)
>> X86II::Op0Shift));
break; // Two-byte opcode prefix
- case X86II::REP:
- case X86II::XS:
- case X86II::XD:
- break; // already handled.
default: assert(0 && "Invalid prefix!");
case 0: break; // No prefix!
}