Subversion Repositories mips_fault_tolerant

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-- Company: 
-- Engineer:       Lazaridis Dimitris
-- 
-- Create Date:    22:19:25 04/25/2012 
-- Design Name: 
-- Module Name:    Shift_mux - 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 Shift_mux is
 
Port
(
	        A : in  STD_LOGIC_VECTOR (4 downto 0);
           Shamt : in  STD_LOGIC_VECTOR (4 downto 0);
           sv : in  STD_LOGIC;
			  lui : in  STD_LOGIC;
           Shamt_out : out  STD_LOGIC_VECTOR (4 downto 0)
);
end Shift_mux;
 
architecture Behavioral of Shift_mux is
begin
 
 
         Shamt_out <= "10000" when lui = '1' else
			               Shamt when sv = '0'  else
			                   A when sv = '1'  else
							  "00000";
 
end Behavioral;