mul33.vhd

bch 编码和译码

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-- Company: 
-- Engineer:
--
-- Create Date:    20:03:50 04/09/08
-- Design Name:    
-- Module Name:    mul33 - 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 mul33 is
	port(
			mul33_in:in std_logic_vector(12 downto 0);	  --msb_lsb
			mul33_out:out std_logic_vector(12 downto 0)
			);
end mul33;

architecture Behavioral of mul33 is

begin

mul33_out(0)<=mul33_in(4) xor mul33_in(6) xor mul33_in(7) xor mul33_in(0) xor mul33_in(11) xor mul33_in(12) xor mul33_in(8) xor mul33_in(9);
mul33_out(1)<=mul33_in(4) xor mul33_in(6) xor mul33_in(10) xor mul33_in(0) xor mul33_in(1) xor mul33_in(5) xor mul33_in(11);
mul33_out(2)<=mul33_in(6) xor mul33_in(12) xor mul33_in(7) xor mul33_in(0) xor mul33_in(11) xor mul33_in(2) xor mul33_in(1) xor mul33_in(5);
mul33_out(3)<=mul33_in(2) xor mul33_in(3) xor mul33_in(1) xor mul33_in(9) xor mul33_in(4) xor mul33_in(11);
mul33_out(4)<=mul33_in(5) xor mul33_in(2) xor mul33_in(0) xor mul33_in(6) xor mul33_in(3) xor mul33_in(7) xor mul33_in(8) xor mul33_in(10) xor mul33_in(9) xor mul33_in(11);
mul33_out(5)<=mul33_in(6) xor mul33_in(1) xor mul33_in(11) xor mul33_in(7) xor mul33_in(8) xor mul33_in(0) xor mul33_in(3) xor mul33_in(9) xor mul33_in(4) xor mul33_in(12) xor mul33_in(10);
mul33_out(6)<=mul33_in(0) xor mul33_in(1) xor mul33_in(8) xor mul33_in(4) xor mul33_in(7) xor mul33_in(10) xor mul33_in(9) xor mul33_in(5) xor mul33_in(11) xor mul33_in(2) xor mul33_in(12);
mul33_out(7)<=mul33_in(11) xor mul33_in(2) xor mul33_in(8) xor mul33_in(5) xor mul33_in(0) xor mul33_in(1) xor mul33_in(6) xor mul33_in(3) xor mul33_in(12) xor mul33_in(10) xor mul33_in(9);
mul33_out(8)<=mul33_in(1) xor mul33_in(7) xor mul33_in(12) xor mul33_in(10) xor mul33_in(11) xor mul33_in(4) xor mul33_in(6) xor mul33_in(9) xor mul33_in(2) xor mul33_in(3);
mul33_out(9)<=mul33_in(11) xor mul33_in(4) xor mul33_in(8) xor mul33_in(0) xor mul33_in(12) xor mul33_in(7) xor mul33_in(2) xor mul33_in(3) xor mul33_in(10) xor mul33_in(5);
mul33_out(10)<=mul33_in(11) xor mul33_in(3) xor mul33_in(9) xor mul33_in(4) xor mul33_in(1) xor mul33_in(5) xor mul33_in(12) xor mul33_in(8) xor mul33_in(6);
mul33_out(11)<=mul33_in(2) xor mul33_in(10) xor mul33_in(12) xor mul33_in(6) xor mul33_in(5) xor mul33_in(7) xor mul33_in(4) xor mul33_in(9);
mul33_out(12)<=mul33_in(5) xor mul33_in(6) xor mul33_in(11) xor mul33_in(7) xor mul33_in(8) xor mul33_in(3) xor mul33_in(10);


end Behavioral;