fulladder_xor.vhd.bak

application of a galois field multiplication and normal multiplication

Library ieee ;
use ieee.std_logic_1164.all;

entity FLA_XOR is	   -- full-adder or XOR
   port (
            --cont = 1 : fulladder else xor if ci = 0 
            cont : in std_logic;
            a  : in  std_logic;
            b  : in  std_logic;
            ci : in  std_logic;
            s  : out std_logic;
            co : out std_logic
         );
end FLA_XOR;

architecture FLA_XOR_RTL of FLA_XOR is

begin

        s     <=  a xor b xor ci;
        co    <=  (a AND b) OR ( ci AND ((a OR b) and cont ));
end FLA_XOR_RTL;