mul16.vhd

在gf(2^13)中

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-- Company: 
-- Engineer:
--
-- Create Date:    16:23:37 04/01/08
-- Design Name:    
-- Module Name:    mul16 - 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;


---a^16:(b6+b8+b9+b5)*x^12+(b5+b8+b4+b7)*x^11+(b4+b6+b12+b7+b3)*x^10+(b11+b3+b5+b6+b2)*x^9+(b2+b5+b4+b12+b1+b10)*x^8
--+(b11+b1+b0+b9+b3+b4)*x^7+(b3+b10+b8+b2+b0)*x^6+(b9+b7+b2+b1)*x^5+(b6+b12+b8+b1+b0)*x^4+(b8+b9+b11+b0+b7+b6)*x^3+(b10+b7+b12+b9)*x^2+(b6+b11+b8+b9)*x+b7+b9+b10+b6


entity mul16 is
	port(mul16_in:in std_logic_vector(12 downto 0);	  --msb_lsb
	     mul16_out:out std_logic_vector(12 downto 0)
		  );
end mul16;

architecture Behavioral of mul16 is

begin

mul16_out(0)<=mul16_in(6) xor mul16_in(7) xor mul16_in(9) xor mul16_in(10);
mul16_out(1)<=mul16_in(6) xor mul16_in(8) xor mul16_in(9) xor mul16_in(11);
mul16_out(2)<=mul16_in(7) xor mul16_in(9) xor mul16_in(10) xor mul16_in(12);
mul16_out(3)<=mul16_in(0) xor mul16_in(6) xor mul16_in(7) xor mul16_in(8) xor mul16_in(9) xor mul16_in(11);
mul16_out(4)<=mul16_in(0) xor mul16_in(1) xor mul16_in(6) xor mul16_in(8) xor mul16_in(12);
mul16_out(5)<=mul16_in(1) xor mul16_in(2) xor mul16_in(7) xor mul16_in(9);
mul16_out(6)<=mul16_in(0) xor mul16_in(2) xor mul16_in(3) xor mul16_in(8) xor mul16_in(10);
mul16_out(7)<=mul16_in(0) xor mul16_in(1) xor mul16_in(3) xor mul16_in(4) xor mul16_in(9) xor mul16_in(11);
mul16_out(8)<=mul16_in(1) xor mul16_in(2) xor mul16_in(4) xor mul16_in(5) xor mul16_in(10) xor mul16_in(12);
mul16_out(9)<=mul16_in(2) xor mul16_in(3) xor mul16_in(5) xor mul16_in(6) xor mul16_in(11);
mul16_out(10)<=mul16_in(3) xor mul16_in(4) xor mul16_in(6) xor mul16_in(7) xor mul16_in(12);
mul16_out(11)<=mul16_in(4) xor mul16_in(5) xor mul16_in(7) xor mul16_in(8);
mul16_out(12)<=mul16_in(5) xor mul16_in(6) xor mul16_in(8) xor mul16_in(9);

end Behavioral;