Programme en C: Additionneur complet 4 bits ac4
- 1. Additionneur complet 4 bits AC4 library ieee; use ieee.std_logic_1164.all; entity AC4 is port( A,B: in std_logic_vector(3 downto 0); som : out std_logic_vector(3 downto 0); Ret: out std_logic ); end AC4; architecture arch of AC4 is component da is port ( A,B : in std_logic; sigma, R : out std_logic ); end component; component ac1 is port ( a,b,r: in std_logic; S, Ro: out std_logic ); end component;
- 2. signal x:std_logic_vector (3 downto 0); begin objet1: da port map ( A(0),B(0),som(0),x(0)); objet2: ac1 port map ( A(1),B(1),x(0),som(1),x(1)); objet3: ac1 port map ( A(2),B(2),x(1),som(2),x(2)); objet4: ac1 port map ( A(3),B(3),x(2),som(3),x(3)); Ret<=x(3); end arch;