int MemOperand, const MCInst &MI,
const MCInstrDesc &Desc,
raw_ostream &OS) const {
+ assert(!(TSFlags & X86II::LOCK) && "Can't have LOCK VEX.");
+
uint64_t Encoding = TSFlags & X86II::EncodingMask;
bool HasEVEX_K = TSFlags & X86II::EVEX_K;
bool HasVEX_4V = TSFlags & X86II::VEX_4V;
: X86II::OpSize16))
EmitByte(0x66, CurByte, OS);
+ // Emit the LOCK opcode prefix.
+ if (TSFlags & X86II::LOCK)
+ EmitByte(0xF0, CurByte, OS);
+
switch (TSFlags & X86II::OpPrefixMask) {
case X86II::PD: // 66
EmitByte(0x66, CurByte, OS);
int MemoryOperand = X86II::getMemoryOperandNo(TSFlags, Opcode);
if (MemoryOperand != -1) MemoryOperand += CurOp;
- // Emit the lock opcode prefix as needed.
- if (TSFlags & X86II::LOCK)
- EmitByte(0xF0, CurByte, OS);
-
// Emit segment override opcode prefix as needed.
if (MemoryOperand >= 0)
EmitSegmentOverridePrefix(CurByte, MemoryOperand+X86::AddrSegmentReg,
; X32: incw
%t2 = atomicrmw add i16* @sc16, i16 3 acquire
; X64: lock
-; X64: addw $3, {{.*}} # encoding: [0xf0,0x66
+; X64: addw $3, {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: addw $3
%t3 = atomicrmw add i16* @sc16, i16 5 acquire
; X64: lock
-; X64: xaddw {{.*}} # encoding: [0xf0,0x66
+; X64: xaddw {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: xaddw
%t4 = atomicrmw add i16* @sc16, i16 %t3 acquire
; X64: lock
-; X64: addw {{.*}} # encoding: [0xf0,0x66
+; X64: addw {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: addw
ret void
; X32: decw
%t2 = atomicrmw sub i16* @sc16, i16 3 acquire
; X64: lock
-; X64: subw $3, {{.*}} # encoding: [0xf0,0x66
+; X64: subw $3, {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: subw $3
%t3 = atomicrmw sub i16* @sc16, i16 5 acquire
; X64: lock
-; X64: xaddw {{.*}} # encoding: [0xf0,0x66
+; X64: xaddw {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: xaddw
%t4 = atomicrmw sub i16* @sc16, i16 %t3 acquire
; X64: lock
-; X64: subw {{.*}} # encoding: [0xf0,0x66
+; X64: subw {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: subw
ret void
; X32-LABEL: atomic_fetch_and16
%t1 = atomicrmw and i16* @sc16, i16 3 acquire
; X64: lock
-; X64: andw $3, {{.*}} # encoding: [0xf0,0x66
+; X64: andw $3, {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: andw $3
%t2 = atomicrmw and i16* @sc16, i16 5 acquire
; X32: cmpxchgw
%t3 = atomicrmw and i16* @sc16, i16 %t2 acquire
; X64: lock
-; X64: andw {{.*}} # encoding: [0xf0,0x66
+; X64: andw {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: andw
ret void
; X32-LABEL: atomic_fetch_or16
%t1 = atomicrmw or i16* @sc16, i16 3 acquire
; X64: lock
-; X64: orw $3, {{.*}} # encoding: [0xf0,0x66
+; X64: orw $3, {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: orw $3
%t2 = atomicrmw or i16* @sc16, i16 5 acquire
; X32: cmpxchgw
%t3 = atomicrmw or i16* @sc16, i16 %t2 acquire
; X64: lock
-; X64: orw {{.*}} # encoding: [0xf0,0x66
+; X64: orw {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: orw
ret void
; X32-LABEL: atomic_fetch_xor16
%t1 = atomicrmw xor i16* @sc16, i16 3 acquire
; X64: lock
-; X64: xorw $3, {{.*}} # encoding: [0xf0,0x66
+; X64: xorw $3, {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: xorw $3
%t2 = atomicrmw xor i16* @sc16, i16 5 acquire
; X32: cmpxchgw
%t3 = atomicrmw xor i16* @sc16, i16 %t2 acquire
; X64: lock
-; X64: xorw {{.*}} # encoding: [0xf0,0x66
+; X64: xorw {{.*}} # encoding: [0x66,0xf0
; X32: lock
; X32: xorw
ret void