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Don't special case XS, XD prefixes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26183 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-02-14 21:52:51 +00:00
parent 576c141921
commit ee50a1ae27
1 changed files with 9 additions and 14 deletions
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23
lib/Target/X86/X86CodeEmitter.cpp
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@ -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!
}