mul64.vhd

bch 编码和译码

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-- Company: 
-- Engineer:
--
-- Create Date:    20:38:24 04/01/08
-- Design Name:    
-- Module Name:    mul64 - Behavioral
-- Project Name:   
-- Target Device:  
-- Tool versions:  
-- Description:
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-- Dependencies:
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-- 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 mul64 is
	port(
	mul64_in:in std_logic_vector(12 downto 0);	  --msb_lsb
	mul64_out:out std_logic_vector(12 downto 0)
	);
end mul64;

architecture Behavioral of mul64 is

begin

mul64_out(0)<=mul64_in(6) xor mul64_in(9) xor mul64_in(2) xor mul64_in(5) xor mul64_in(3) xor mul64_in(12);
mul64_out(1)<=mul64_in(0) xor mul64_in(2) xor mul64_in(10) xor mul64_in(4) xor mul64_in(5) xor mul64_in(9) xor mul64_in(7) xor mul64_in(12);
mul64_out(2)<=mul64_in(10) xor mul64_in(3) xor mul64_in(0) xor mul64_in(8) xor mul64_in(6) xor mul64_in(11) xor mul64_in(1) xor mul64_in(5);
mul64_out(3)<=mul64_in(4) xor mul64_in(3) xor mul64_in(11) xor mul64_in(7) xor mul64_in(5) xor mul64_in(1);
mul64_out(4)<=mul64_in(9) xor mul64_in(3) xor mul64_in(0) xor mul64_in(4) xor mul64_in(8);
mul64_out(5)<=mul64_in(4) xor mul64_in(5) xor mul64_in(1) xor mul64_in(10) xor mul64_in(9);
mul64_out(6)<=mul64_in(2) xor mul64_in(5) xor mul64_in(10) xor mul64_in(11) xor mul64_in(6);
mul64_out(7)<=mul64_in(11) xor mul64_in(0) xor mul64_in(6) xor mul64_in(7) xor mul64_in(12) xor mul64_in(3);
mul64_out(8)<=mul64_in(7) xor mul64_in(12) xor mul64_in(1) xor mul64_in(8) xor mul64_in(0) xor mul64_in(4);
mul64_out(9)<=mul64_in(8) xor mul64_in(5) xor mul64_in(2) xor mul64_in(9) xor mul64_in(1);
mul64_out(10)<=mul64_in(3) xor mul64_in(2) xor mul64_in(0) xor mul64_in(9) xor mul64_in(6) xor mul64_in(10);
mul64_out(11)<=mul64_in(7) xor mul64_in(1) xor mul64_in(10) xor mul64_in(0) xor mul64_in(4) xor mul64_in(3) xor mul64_in(11);
mul64_out(12)<=mul64_in(1) xor mul64_in(11) xor mul64_in(2) xor mul64_in(12) xor mul64_in(5) xor mul64_in(8) xor mul64_in(4);


end Behavioral;