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library ieee;
use ieee.std_logic_1164.all;
entity if01 is
port (a : std_logic;
b : std_logic;
en1 : std_logic;
sel1 : std_logic;
clk : std_logic;
s1 : out std_logic;
s2 : out std_logic);
end if01;
architecture behav of if01 is
begin
process (clk) is
variable t : std_logic;
begin
if rising_edge(clk) then
if en1 = '1' then
t := b;
s1 <= a;
end if;
s2 <= t;
end if;
end process;
end behav;
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