... PROCESS (rx_clk135) BEGIN IF (rx_clk135 = '1' AND rx_clk135'event) THEN n1iO0l51 <= n1iO0l49; n1iO0O46 <= n1iO0O48; n1iO0O47 <= (n1iO0O48 XOR n1iO0O46); END IF; END PROCESS; ....