// Classify VEX_B, VEX_4V, VEX_R, VEX_X
unsigned CurOp = 0;
switch (TSFlags & X86II::FormMask) {
- case X86II::MRMInitReg: llvm_unreachable("FIXME: Remove this!");
+ case X86II::MRMInitReg:
+ // Duplicate register.
+ if (X86II::isX86_64ExtendedReg(MI.getOperand(CurOp).getReg()))
+ VEX_R = 0x0;
+
+ if (HasVEX_4V)
+ VEX_4V = getVEXRegisterEncoding(MI, CurOp);
+ if (X86II::isX86_64ExtendedReg(MI.getOperand(CurOp).getReg()))
+ VEX_B = 0x0;
+ if (HasVEX_4VOp3)
+ VEX_4V = getVEXRegisterEncoding(MI, CurOp);
+ break;
case X86II::MRMDestMem: {
// MRMDestMem instructions forms:
// MemAddr, src1(ModR/M)