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library ieee;
use ieee.std_logic_1164.all;
entity if02 is
port (c : std_logic_vector(7 downto 0);
s : std_logic;
r : out std_logic_vector(7 downto 0));
end if02;
architecture behav of if02 is
begin
process (c, s)
begin
if s = '0' then
r (6 downto 0) <= c (7 downto 1);
r (7) <= c (0);
else
r (0) <= c (7);
r (7 downto 1) <= c (6 downto 0);
end if;
end process;
end behav;
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