DA算法中的使用的查找表模块

				LIBRARY IEEE;
				USE IEEE.STD_LOGIC_1164.ALL;
				ENTITY case1  IS
				PORT ( table_in:in std_logic_vector(3 downto 0);
				       table_out:out integer range -10 to 70);
				END case1;
				ARCHITECTURE behave OF case1 IS
				BEGIN
				  PROCESS (table_in)
				    BEGIN
				      case table_in is
				           when "0000"=>table_out				           when "0001"=>table_out				           when "0010"=>table_out				           when "0011"=>table_out				           when "0100"=>table_out				           when "0101"=>table_out				           when "0110"=>table_out				           when "0111"=>table_out				           when "1000"=>table_out				           when "1001"=>table_out				           when "1010"=>table_out				           when "1011"=>table_out				           when "1100"=>table_out				           when "1101"=>table_out				           when "1110"=>table_out				           when "1111"=>table_out				           when others=>table_out				
				      end case;
				  END PROCESS;
				END behave;