BINARY to GREY CODE CONVERTERS-(Dataflow)

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

entity B_G is

    Port ( B3,B2,B1,B0 : in  STD_LOGIC;

           G3,G2,G1,G0 : out  STD_LOGIC);

end B_G;

architecture Dataflow of B_G is

begin

G3<=B3;
G2<=B3 xor B2;
G1<=B2 xor B1;
G0<=B1 xor B0;

end  Dataflow;