?? ex_p4_20_l0_counter.vhd
字號:
--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;
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