mul80.vhd

在gf(2^13)中

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-- Company: 
-- Engineer:
--
-- Create Date:    20:38:45 04/01/08
-- Design Name:    
-- Module Name:    mul80 - 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 mul80 is
port(
	mul80_in:in std_logic_vector(12 downto 0);	  --msb_lsb
	mul80_out:out std_logic_vector(12 downto 0)
	);
end mul80;

architecture Behavioral of mul80 is

begin

mul80_out(0)<=mul80_in(8) xor mul80_in(7) xor mul80_in(1) xor mul80_in(6) xor mul80_in(2) xor mul80_in(12);
mul80_out(1)<=mul80_in(3) xor mul80_in(12) xor mul80_in(1) xor mul80_in(9) xor mul80_in(6);
mul80_out(2)<=mul80_in(2) xor mul80_in(4) xor mul80_in(7) xor mul80_in(10);
mul80_out(3)<=mul80_in(2) xor mul80_in(0) xor mul80_in(7) xor mul80_in(11) xor mul80_in(12) xor mul80_in(5) xor mul80_in(3) xor mul80_in(1) xor mul80_in(6);
mul80_out(4)<=mul80_in(4) xor mul80_in(3);
mul80_out(5)<=mul80_in(5) xor mul80_in(4) xor mul80_in(0);
mul80_out(6)<=mul80_in(1) xor mul80_in(0) xor mul80_in(6) xor mul80_in(5);
mul80_out(7)<=mul80_in(6) xor mul80_in(7) xor mul80_in(0) xor mul80_in(1) xor mul80_in(2);
mul80_out(8)<=mul80_in(2) xor mul80_in(1) xor mul80_in(8) xor mul80_in(7) xor mul80_in(3);
mul80_out(9)<=mul80_in(3) xor mul80_in(9) xor mul80_in(4) xor mul80_in(2) xor mul80_in(8);
mul80_out(10)<=mul80_in(3) xor mul80_in(4) xor mul80_in(10) xor mul80_in(5) xor mul80_in(9);
mul80_out(11)<=mul80_in(0) xor mul80_in(6) xor mul80_in(5) xor mul80_in(11) xor mul80_in(10) xor mul80_in(4);
mul80_out(12)<=mul80_in(11) xor mul80_in(6) xor mul80_in(0) xor mul80_in(12) xor mul80_in(7) xor mul80_in(5) xor mul80_in(1);


end Behavioral;