mux.vhd

    library ieee;
    use ieee.std_logic_1164.all;
    use ieee.numeric_std.all; 
    use IEEE.math_real.all;

entity MUX is

	port(
		A: in std_logic_vector (31 downto 0);
		B: in std_logic_vector (31 downto 0);
		S: in std_logic;
		Z: out std_logic_vector (31 downto 0));
		
end MUX;
 
architecture main of MUX is
  
begin
	
	Z <= A when (S = '0') else B;
	
end main;