--	Multiplexeur

ENTITY mux IS
  PORT (
		a 	: in bit_vector(3 downto 0);
		b 	: in bit_vector(3 downto 0);
		sel 	: in bit;
		s	: out bit_vector(3 downto 0);
                vdd     : in bit;
                vss     : in bit
    );
END mux;


-- Architecture Declaration

ARCHITECTURE behaviour_data_flow OF mux IS


BEGIN

with sel select
	s <= 	a 	when '0',
		b 	when '1';
END;