return !(isRegInd(op) || isRegDisp(op) || isRegOff(op));
return !(isAbs(op) || isRegInd(op) || isRegDisp(op) || isRegOff(op));
    static boolean isRegIdx(OPT_Operand op) {	if (op instanceof OPT_MemoryOperand) 	    return !(isRegInd(op) || isRegDisp(op) || isRegOff(op));	else	    return false;    }