and_mode.vhd

使用加法器树乘法器实现8位乘法运算

library IEEE; 
use IEEE.STD_LOGIC_1164.ALL;  
use IEEE.STD_LOGIC_UNSIGNED.ALL; 

entity and_mode is
port 
       ( 
         and1: in std_logic_vector(7 downto 0);
         and2: in std_logic;
         out1: out std_logic_vector(7 downto 0)
       );
end and_mode;

architecture answer2 of and_mode is
   begin
   process (and1,and2)
   begin

      if and2 ='0' then
         out1<="00000000";
      else
         out1<=and1;
      end if;

   end process;
end answer2;