mul4112.vhd

bch 编码和译码

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-- Company: 
-- Engineer:
--
-- Create Date:    20:33:47 04/09/08
-- Design Name:    
-- Module Name:    mul4112 - Behavioral
-- Project Name:   
-- Target Device:  
-- 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 instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity mul4112 is
		port(
				mul4112_in:in std_logic_vector(12 downto 0);	  --msb_lsb
	     		mul4112_out:out std_logic_vector(12 downto 0)
		  );
end mul4112;

architecture Behavioral of mul4112 is

begin
  
mul4112_out(0)<=mul4112_in(2) xor mul4112_in(3) xor mul4112_in(6) xor mul4112_in(1) xor mul4112_in(10) xor mul4112_in(9);
mul4112_out(1)<=mul4112_in(1) xor mul4112_in(7) xor mul4112_in(6) xor mul4112_in(9) xor mul4112_in(11) xor mul4112_in(4);
mul4112_out(2)<=mul4112_in(7) xor mul4112_in(8) xor mul4112_in(2) xor mul4112_in(5) xor mul4112_in(12) xor mul4112_in(10);
mul4112_out(3)<=mul4112_in(2) xor mul4112_in(10) xor mul4112_in(1) xor mul4112_in(8) xor mul4112_in(11);
mul4112_out(4)<=mul4112_in(0) xor mul4112_in(6) xor mul4112_in(11) xor mul4112_in(12) xor mul4112_in(1) xor mul4112_in(10);
mul4112_out(5)<=mul4112_in(2) xor mul4112_in(7) xor mul4112_in(11) xor mul4112_in(12) xor mul4112_in(1);
mul4112_out(6)<=mul4112_in(3) xor mul4112_in(2) xor mul4112_in(12) xor mul4112_in(8);
mul4112_out(7)<=mul4112_in(9) xor mul4112_in(4) xor mul4112_in(0) xor mul4112_in(3);
mul4112_out(8)<=mul4112_in(1) xor mul4112_in(10) xor mul4112_in(5) xor mul4112_in(4);
mul4112_out(9)<=mul4112_in(11) xor mul4112_in(2) xor mul4112_in(6) xor mul4112_in(5);
mul4112_out(10)<=mul4112_in(12) xor mul4112_in(7) xor mul4112_in(3) xor mul4112_in(0) xor mul4112_in(6);
mul4112_out(11)<=mul4112_in(4) xor mul4112_in(7) xor mul4112_in(1) xor mul4112_in(0) xor mul4112_in(8);
mul4112_out(12)<=mul4112_in(5) xor mul4112_in(9) xor mul4112_in(0) xor mul4112_in(2) xor mul4112_in(1) xor mul4112_in(8);



end Behavioral;