Subversion Repositories mips_fault_tolerant

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-- Company: 

-- Engineer:       Lazaridis Dimitris

-- 

-- Create Date:    22:57:38 07/25/2012 

-- Design Name: 

-- Module Name:    Mult_out - 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;

--use IEEE.STD_LOGIC_ARITH.ALL;

--use IEEE.STD_LOGIC_UNSIGNED.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 Mult_out is

     port (

                clk : in std_logic;

                          rst,Mult_en : in  STD_LOGIC;

                          Mul_out_c : in STD_LOGIC_VECTOR (1 downto 0);

                          A_in : in STD_LOGIC_VECTOR (31 downto 0);

                Hi_to_out : in STD_LOGIC_VECTOR (31 downto 0);

                          Lo_to_out : in STD_LOGIC_VECTOR (31 downto 0);

                          Hi_out : out STD_LOGIC_VECTOR (31 downto 0);

                          Lo_out : out STD_LOGIC_VECTOR (31 downto 0)

                  );

end Mult_out;

architecture Behavioral of Mult_out is

begin

                process(clk,rst,Mult_en,Mul_out_c,A_in,Hi_to_out,Lo_to_out)

                 begin

                      If (RISING_EDGE(clk)) then

                                if rst = '0' then

                                    Lo_out <= (others => '0');

                                         Hi_out <= (others => '0');

                                else

              if Mult_en = '1' then

                                  case Mul_out_c is

                                    when "00" =>

                                    Hi_out <= Hi_to_out;

                                         Lo_out <= Lo_to_out;

                when "01" =>

                                         Lo_out <= A_in;

                                         when "10" =>

                                         Hi_out <= A_in;

                                         when others =>

                                         Hi_out <= (others => '0');

                                         Lo_out <= (others => '0');

                          end case;

                          end if;

           END IF;

           end if;

                 end process;

end Behavioral;