if (op.equals("=")) return EQ; if (op.equals("!=")) return NEQ; if (op.equals(">")) return GT; if (op.equals("<")) return LT; if (op.equals(">=")) return GEQ; if (op.equals("<=")) return LEQ;
if (op.equals("EQ")) return EQ; if (op.equals("NE")) return NEQ; if (op.equals("GT")) return GT; if (op.equals("LT")) return LT; if (op.equals("GE")) return GEQ; if (op.equals("LE")) return LEQ;
        private int genOpCode(String op) {            if (op.equals("=")) return EQ;            if (op.equals("!=")) return NEQ;            if (op.equals(">")) return GT;            if (op.equals("<")) return LT;            if (op.equals(">=")) return GEQ;            if (op.equals("<=")) return LEQ;            return NOP;        }