-- Multiplexer 16-to-4 using if-then-elsif-else Statement
ibrary ieee;
use ieee.std_log_1164.all;
entity mux is port(
a, b, c, d: in std_logic_vector(3 downto 0);
s: in std_logic_vector(1 downto 0);
x: out std_logic_vector(3 downto 0));
end mux;
architecture archmux of mux is
begin
mux4_1: process (a, b, c, d)
begin
if s = "00" then
x <= a;
elsif s = "01" then
x <= b;
elsif s = "10" then
x <= c;
else
x <= d;
end if;
end process mux4_1;
end archmux;
