74X138 Using with – select statement in data flow model

74X138     Using with – select statement in data flow model

library IEEE;

use IEEE.std_logic_1164.all;

entity dec74x138 is

port ( G1, G2A_L, G2B_L : in  STD_LOGIC;

                    A, B, C : in   STD_LOGIC;

                    Y0_L, Y1_L, Y2_L, Y3_L, Y4_L, Y5_L, Y6_L, Y7_L:  out  STD_LOGIC);

end dec74x138;

architecture arch3 of dec74x138 is

begin

          with (G1 & G2A_L & G2B_L & A & B & C) select

Y0_L <= ‘0’ when “100000”,

               ‘1’ when others;

with (G1 & G2A_L & G2B_L & A & B & C) select

Y1_L <= ‘0’ when “100001”,

              ‘1’ when others;

          with (G1 & G2A_L & G2B_L & A & B & C) select

Y2_L <= ‘0’ when “100010”,

              ‘1’ when others;

          with (G1 & G2A_L & G2B_L & A & B & C) select

Y3_L <= ‘0’ when “100011”,

              ‘1’ when others;

          with (G1 & G2A_L & G2B_L & A & B & C) select

Y4_L <= ‘0’ when “100100”,

               ‘1’ when others;

with (G1 & G2A_L & G2B_L & A & B & C) select

Y5_L <= ‘0’ when “100101”,

              ‘1’ when others;

          with (G1 & G2A_L & G2B_L & A & B & C) select

Y6_L <= ‘0’ when “100110”,

              ‘1’ when others;

          with (G1 & G2A_L & G2B_L & A & B & C) select

Y7_L <= ‘0’ when “100111”,

              ‘1’ when others;

end arch3;