mul56.vhd

在gf(2^13)中

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-- Company: 
-- Engineer:
--
-- Create Date:    20:38:13 04/01/08
-- Design Name:    
-- Module Name:    mul56 - 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 mul56 is
	port(
	mul56_in:in std_logic_vector(12 downto 0);	  --msb_lsb
	mul56_out:out std_logic_vector(12 downto 0)
	);
end mul56;

architecture Behavioral of mul56 is

begin

mul56_out(0)<=mul56_in(10) xor mul56_in(3) xor mul56_in(2) xor mul56_in(7) xor mul56_in(11);
mul56_out(1)<=mul56_in(12) xor mul56_in(8) xor mul56_in(2) xor mul56_in(7) xor mul56_in(4) xor mul56_in(10);
mul56_out(2)<=mul56_in(8) xor mul56_in(11) xor mul56_in(9) xor mul56_in(5) xor mul56_in(3);
mul56_out(3)<=mul56_in(0) xor mul56_in(9) xor mul56_in(7) xor mul56_in(3) xor mul56_in(11) xor mul56_in(12) xor mul56_in(4) xor mul56_in(2) xor mul56_in(6);
mul56_out(4)<=mul56_in(1) xor mul56_in(11) xor mul56_in(2) xor mul56_in(12) xor mul56_in(5) xor mul56_in(8) xor mul56_in(4);
mul56_out(5)<=mul56_in(6) xor mul56_in(12) xor mul56_in(9) xor mul56_in(3) xor mul56_in(5) xor mul56_in(2);
mul56_out(6)<=mul56_in(10) xor mul56_in(0) xor mul56_in(7) xor mul56_in(4) xor mul56_in(6) xor mul56_in(3);
mul56_out(7)<=mul56_in(5) xor mul56_in(8) xor mul56_in(4) xor mul56_in(7) xor mul56_in(11) xor mul56_in(1);
mul56_out(8)<=mul56_in(8) xor mul56_in(5) xor mul56_in(2) xor mul56_in(6) xor mul56_in(12) xor mul56_in(9);
mul56_out(9)<=mul56_in(7) xor mul56_in(3) xor mul56_in(6) xor mul56_in(9) xor mul56_in(10);
mul56_out(10)<=mul56_in(4) xor mul56_in(11) xor mul56_in(0) xor mul56_in(10) xor mul56_in(8) xor mul56_in(7);
mul56_out(11)<=mul56_in(8) xor mul56_in(11) xor mul56_in(9) xor mul56_in(12) xor mul56_in(0) xor mul56_in(5) xor mul56_in(1);
mul56_out(12)<=mul56_in(10) xor mul56_in(6) xor mul56_in(12) xor mul56_in(2) xor mul56_in(9) xor mul56_in(1);


end Behavioral;