Subversion Repositories generic_booth_multipler

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

entity RightShiftReg is

        generic(

                size : integer := 4

        );

        port(

                clock    :in    std_logic;

                enable :in      std_logic;

                shift    :in    std_logic;

                din      :in    std_logic_vector(size-1 downto 0);

                dout     :out std_logic_vector(1 downto 0));

end RightShiftReg;

architecture Behavioral of RightShiftReg is

        signal data : std_logic_vector(din'length-1 downto 0);

begin

        process(clock, enable, shift)

        begin

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

                        if(enable = '1')then

                                data <= din;

                        elsif(shift = '1') then

                                data <= '0' & data(din'length-1 downto 1);

                        else

                                data <= data;

                        end if;

                end if;

        end process;

        dout <= data(1 downto 0);

end Behavioral;