Subversion Repositories generic_booth_multipler

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

entity LeftShiftReg is

                port(

                        clock    :in    std_logic;

                        enable :in      std_logic;

                        shift    :in    std_logic;

                        din      :in    std_logic_vector;

                        dout     :out std_logic_vector);

end LeftShiftReg;

architecture Behavioral of LeftShiftReg is

        signal data : std_logic_vector(din'range);

begin

        process(clock,enable,shift)

        begin

                if(clock'event and clock = '1')then

                        if(enable = '1')then

                                data <= din;

                        elsif(shift = '1') then

                                data <= data(din'length-2 downto 0) & '0';

                        else

                                data <= data;

                        end if;

                end if;

        end process;

        dout <= data;

end Behavioral;