Subversion Repositories mips_fault_tolerant

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-- Company: 

-- Engineer: 

-- 

-- Create Date:    20:45:11 04/22/2012 

-- Design Name: 

-- Module Name:    Mux_4_1 - Behavioral 

-- Project Name: 

-- Target Devices: 

-- Tool versions: 

-- Description: 

--

-- Dependencies: 

--

-- Revision: 

-- Revision 0.01 - File Created

-- Additional Comments: 

--

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library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

-- Uncomment the following library declaration if using

-- arithmetic functions with Signed or Unsigned values

--use IEEE.NUMERIC_STD.ALL;

-- Uncomment the following library declaration if instantiating

-- any Xilinx primitives in this code.

--library UNISIM;

--use UNISIM.VComponents.all;

entity Mux_4_1 is

Generic (

         busw : integer := 31

);

    Port (

                Logic_out : in  std_logic_vector(busw downto 0);

           Adder_out : in  std_logic_vector(busw downto 0);

                          Shift_out : in  std_logic_vector(busw downto 0);

                          Slt_out : in  std_logic_vector(busw downto 0);

           ALUmux : in  std_logic_vector(1 downto 0);

           Mux_out : out std_logic_vector(busw downto 0));

end Mux_4_1;

architecture Behavioral of Mux_4_1 is

begin

mux_4_1:process(ALUmux,Logic_out,Adder_out,Shift_out,Slt_out)

begin

                  case ALUmux is

                       when "10"   => Mux_out <=  Adder_out;

                                 when "01"   => Mux_out <=  Slt_out;

                                 when "00"   => Mux_out <=  Shift_out;

                                 when "11"   => Mux_out <=  Logic_out;

                                 when others => Mux_out <= (others =>'0');

                        end case;

end process mux_4_1;

end Behavioral;