mul25.vhd

在gf(2^13)中

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-- Company: 
-- Engineer:
--
-- Create Date:    10:08:23 04/09/08
-- Design Name:    
-- Module Name:    mul25 - Behavioral
-- Project Name:   
-- Target Device:  
-- Tool versions:  
-- Description:
--
-- 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 mul25 is
	port(
	mul25_in:in std_logic_vector(12 downto 0);	  --msb_lsb
	mul25_out:out std_logic_vector(12 downto 0)
	);
end mul25;

architecture Behavioral of mul25 is

begin

mul25_out(0)<=mul25_in(0) xor mul25_in(6) xor mul25_in(12) xor mul25_in(8) xor mul25_in(1);
mul25_out(1)<=mul25_in(7) xor mul25_in(2) xor mul25_in(12) xor mul25_in(6) xor mul25_in(8) xor mul25_in(0) xor mul25_in(9);
mul25_out(2)<=mul25_in(0) xor mul25_in(7) xor mul25_in(9) xor mul25_in(3) xor mul25_in(8) xor mul25_in(10) xor mul25_in(1);
mul25_out(3)<=mul25_in(4) xor mul25_in(2) xor mul25_in(10) xor mul25_in(6) xor mul25_in(11) xor mul25_in(0) xor mul25_in(12) xor mul25_in(9);
mul25_out(4)<=mul25_in(5) xor mul25_in(6) xor mul25_in(11) xor mul25_in(7) xor mul25_in(8) xor mul25_in(3) xor mul25_in(10);
mul25_out(5)<=mul25_in(11) xor mul25_in(4) xor mul25_in(8) xor mul25_in(0) xor mul25_in(12) xor mul25_in(7) xor mul25_in(9) xor mul25_in(6);
mul25_out(6)<=mul25_in(1) xor mul25_in(7) xor mul25_in(12) xor mul25_in(5) xor mul25_in(10) xor mul25_in(8) xor mul25_in(9);
mul25_out(7)<=mul25_in(8) xor mul25_in(11) xor mul25_in(0) xor mul25_in(10) xor mul25_in(6) xor mul25_in(9) xor mul25_in(2);
mul25_out(8)<=mul25_in(11) xor mul25_in(10) xor mul25_in(12) xor mul25_in(3) xor mul25_in(9) xor mul25_in(7) xor mul25_in(1);
mul25_out(9)<=mul25_in(12) xor mul25_in(8) xor mul25_in(11) xor mul25_in(10) xor mul25_in(4) xor mul25_in(2);
mul25_out(10)<=mul25_in(11) xor mul25_in(5) xor mul25_in(9) xor mul25_in(12) xor mul25_in(3);
mul25_out(11)<=mul25_in(12) xor mul25_in(10) xor mul25_in(4) xor mul25_in(6);
mul25_out(12)<=mul25_in(0) xor mul25_in(11) xor mul25_in(7) xor mul25_in(5);

end Behavioral;