if val(7 downto 4)+ flag >"1001" then
					val(7 downto 4)<=val(7 downto 4)-"1001";
					flag<='1';
				else 
					val(7 downto 4)<=val(7 downto 4)+flag;
					flag<='0';
				end if;	
				
				if val(11 downto 8)+ flag >"1001" then
					val(11 downto 8)<=val(11 downto 8)-"1001";
					flag<='1';
				else 
					val(11 downto 8)<=val(11 downto 8)+flag;
					flag<='0';
				end if;	

				if val(15 downto 12)+ flag >"1001" then
					val(15 downto 12)<=val(15 downto 12)-"1001";
					flag<='1';
				else 
					val(15 downto 12)<=val(15 downto 12)+flag;
					flag<='0';
				end if;	
				

				val(19 downto 16)<=val(19 downto 16)+flag;
				flag<='0';