40 Figure 6.39 Alternative code for a 2-to-1 multiplexer LIBRARY ieee ; USE ieee.std_logic_1164.all ; ENTITY mux2to1 IS PORT ( w0, w1, s: IN STD_LOGIC ; f : OUT STD_LOGIC ) ; END mux2to1 ; ARCHITECTURE Behavior OF mux2to1 IS BEGIN PROCESS ( w0, w1, s ) BEGIN f <= w0 ; IF s = 1 THEN f <= w1 ; END IF ; END PROCESS ; END Behavior ;