intptr_t PCAdj = 0);
void emitRegModRMByte(unsigned ModRMReg, unsigned RegOpcodeField);
intptr_t PCAdj = 0);
void emitRegModRMByte(unsigned ModRMReg, unsigned RegOpcodeField);
+ void emitRegModRMByte(unsigned RegOpcodeField);
void emitSIBByte(unsigned SS, unsigned Index, unsigned Base);
void emitConstant(uint64_t Val, unsigned Size);
void emitSIBByte(unsigned SS, unsigned Index, unsigned Base);
void emitConstant(uint64_t Val, unsigned Size);
MCE.emitByte(ModRMByte(3, RegOpcodeFld, getX86RegNum(ModRMReg)));
}
MCE.emitByte(ModRMByte(3, RegOpcodeFld, getX86RegNum(ModRMReg)));
}
+void Emitter::emitRegModRMByte(unsigned RegOpcodeFld) {
+ MCE.emitByte(ModRMByte(3, RegOpcodeFld, 0));
+}
+
void Emitter::emitSIBByte(unsigned SS, unsigned Index, unsigned Base) {
// SIB byte is in the same format as the ModRMByte...
MCE.emitByte(ModRMByte(SS, Index, Base));
void Emitter::emitSIBByte(unsigned SS, unsigned Index, unsigned Base) {
// SIB byte is in the same format as the ModRMByte...
MCE.emitByte(ModRMByte(SS, Index, Base));
case X86II::MRM0r: case X86II::MRM1r:
case X86II::MRM2r: case X86II::MRM3r:
case X86II::MRM4r: case X86II::MRM5r:
case X86II::MRM0r: case X86II::MRM1r:
case X86II::MRM2r: case X86II::MRM3r:
case X86II::MRM4r: case X86II::MRM5r:
- case X86II::MRM6r: case X86II::MRM7r:
+ case X86II::MRM6r: case X86II::MRM7r: {
MCE.emitByte(BaseOpcode);
MCE.emitByte(BaseOpcode);
- emitRegModRMByte(MI.getOperand(CurOp++).getReg(),
- (Desc->TSFlags & X86II::FormMask)-X86II::MRM0r);
+
+ // Special handling of lfence and mfence.
+ if (Desc->getOpcode() == X86::LFENCE ||
+ Desc->getOpcode() == X86::MFENCE)
+ emitRegModRMByte((Desc->TSFlags & X86II::FormMask)-X86II::MRM0r);
+ else
+ emitRegModRMByte(MI.getOperand(CurOp++).getReg(),
+ (Desc->TSFlags & X86II::FormMask)-X86II::MRM0r);
if (CurOp != NumOps) {
const MachineOperand &MO1 = MI.getOperand(CurOp++);
if (CurOp != NumOps) {
const MachineOperand &MO1 = MI.getOperand(CurOp++);
case X86II::MRM0m: case X86II::MRM1m:
case X86II::MRM2m: case X86II::MRM3m:
case X86II::MRM0m: case X86II::MRM1m:
case X86II::MRM2m: case X86II::MRM3m:
TB, Requires<[HasSSE2]>;
// Load, store, and memory fence
TB, Requires<[HasSSE2]>;
// Load, store, and memory fence
-def LFENCE : I<0xAE, MRM5m, (outs), (ins),
+def LFENCE : I<0xAE, MRM5r, (outs), (ins),
"lfence", [(int_x86_sse2_lfence)]>, TB, Requires<[HasSSE2]>;
"lfence", [(int_x86_sse2_lfence)]>, TB, Requires<[HasSSE2]>;
-def MFENCE : I<0xAE, MRM6m, (outs), (ins),
+def MFENCE : I<0xAE, MRM6r, (outs), (ins),
"mfence", [(int_x86_sse2_mfence)]>, TB, Requires<[HasSSE2]>;
//TODO: custom lower this so as to never even generate the noop
"mfence", [(int_x86_sse2_mfence)]>, TB, Requires<[HasSSE2]>;
//TODO: custom lower this so as to never even generate the noop