protected final OPT_IntConstantOperand CAU16 (OPT_Operand o) { return  IC(OPT_Bits.PPCMaskUpper16(IV(o)));
protected final OPT_IntConstantOperand CAU16 (Address a) { return  IC(OPT_Bits.PPCMaskUpper16(a.toWord().toOffset()));
  protected final OPT_IntConstantOperand CAU16 (OPT_Operand o) {    return  IC(OPT_Bits.PPCMaskUpper16(IV(o)));  }