return OPT_MemoryOperand.D(Address.fromIntSignExtend(disp), size, loc, guard);
return OPT_MemoryOperand.D(disp.toWord().toAddress(), size, loc, guard);
  protected final OPT_MemoryOperand MO_D(int disp,                                          byte size, OPT_LocationOperand loc,                                         OPT_Operand guard) {    return OPT_MemoryOperand.D(Address.fromIntSignExtend(disp), size, loc, guard);  }