library ieee; use ieee.std_logic_1164.all; library ieee; use ieee.numeric_std.all; entity mul_215 is port ( result : out std_logic_vector(31 downto 0); in_a : in std_logic_vector(31 downto 0); in_b : in std_logic_vector(15 downto 0) ); end mul_215; architecture augh of mul_215 is signal tmp_res : signed(47 downto 0); begin -- The actual multiplication tmp_res <= signed(in_a) * signed(in_b); -- Set the output result <= std_logic_vector(tmp_res(31 downto 0)); end architecture;