--Leading zero counterentity L0CNTR is	PORT (N:  in bit_vector(15 downto 0);		   NZ:out bit_vector(4  downto 0));end L0CNTR;architecture DF of L0CNTR isbegin    NZ <= "00000" when N(15) = '1' else          "00001" when N(14) = '1' else          "00010" when N(13) = '1' else          "00011" when N(12) = '1' else          "00100" when N(11) = '1' else          "00101" when N(10) = '1' else          "00110" when N(9) = '1' else          "00111" when N(8) = '1' else          "01000" when N(7) = '1' else          "01001" when N(6) = '1' else          "01010" when N(5) = '1' else          "01011" when N(4) = '1' else          "01100" when N(3) = '1' else          "01101" when N(2) = '1' else          "01110" when N(1) = '1' else          "01111" when N(0) = '1' else          "10000";end DF;