MAC dodatak, za direktnu, last section

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

use IEEE.NUMERIC_STD.ALL;

entity mac_last is
    generic (input_data_width : natural :=12);
    Port ( u_i : in STD_LOGIC_VECTOR (input_data_width-1 downto 0);
           b_i : in STD_LOGIC_VECTOR (input_data_width-1 downto 0);
           mac_i : in STD_LOGIC_VECTOR (2*input_data_width-1 downto 0);
           mac_o : out STD_LOGIC_VECTOR (2*input_data_width-1 downto 0));
end mac_last;

architecture Behavioral of mac_last is

begin

    mac_o <= std_logic_vector(signed(mac_i) + (signed(u_i) * signed(b_i)));

end Behavioral;