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[¿¹]shift
# 74 JMJS    02.6.19 09:51

library IEEE;
use IEEE.Std_Logic_1164.all;
use IEEE.std_logic_unsigned.all;
use IEEE.Numeric_STD.all;
use IEEE.std_logic_arith.all;

entity shift is
        port(
                A : in std_logic_vector (7 downto 0);
                Y1,Y2,Y3,Y4,Y5,Y6 : out std_logic_vector (7 downto 0)
        );
end shift;

architecture logic of shift is
        constant B: integer := 3;
begin
        process (A, B) begin
                Y1 <= A sll B; --Logical shift left
                Y2 <= A srl B; --Logical shift right
                Y3 <= A rol B; --Logical rotate left
                Y4 <= A ror B; --Logical rotate right

                Y5 <= A sla B; --Arithmetic shift left
                Y6 <= A sra B; --Arithmetic shift right
        end process

end logic;

----------------------------------------------------------------------

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.Numeric_STD.all;
--use IEEE.std_logic_arith.all;
--use IEEE.std_logic_unsigned.all;

entity shift_tb is
end shift_tb;

architecture logic of shift_tb is
        component shift
                port(
                        A: in unsigned(7 downto 0);
                        Y1,Y2,Y3,Y4,Y5,Y6: out unsigned(7 downto 0)
                );
        end component;
        signal A: unsigned (7 downto 0);
        signal Y1,Y2,Y3,Y4,Y5,Y6: unsigned (7 downto 0);
begin
        UUT : shift port map (
                A  => A,  
                Y1 => Y1,
                Y2 => Y2,
                Y3 => Y3,
                Y4 => Y4,
                Y5 => Y5,
                Y6 => Y6
        );

        process begin
                A <= "00000000";
                wait for 10 ns;

                A <= "01110110";
                wait for 10 ns;

                A <= "00000000";
                wait for 10 ns;
        end process;

end t1;

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