Rotate & Shift

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

entity zw_decoder is
  port (
    a : in  unsigned(7 downto 0);
    z : out unsigned(7 downto 0));
end zw_decoder;

architecture rotate of zw_decoder is

  signal z_out : unsigned(7 downto 0) ;

begin  -- rotate
  z_out <= a rol 1;
  z <=  z_out;
end rotate;