orgate

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity orgate is
    Port ( a : in  STD_LOGIC;
           b : in  STD_LOGIC;
           c : in  STD_LOGIC;
           d : out  STD_LOGIC);
end orgate;

architecture Behavioral of orgate is

begin
    d <= a or b or c;

end Behavioral;