compare.vhd

VHDL子程序集,包括各种例程资料以及源码.

--**************************
--*    2 Bit Comparator    *
--*   Filename : COMPARE   *
--**************************

library IEEE;
use IEEE.std_logic_1164.all;

entity COMPARE is
    port (
          A:     in STD_LOGIC;
          B:     in STD_LOGIC;
          LARGE: out STD_LOGIC;
          EQV:   out STD_LOGIC;
          SMALL: out STD_LOGIC
         );
end COMPARE;

architecture COMPARE_arch of COMPARE is

begin
    LARGE <= A and (not B);
    EQV   <= ((not A) and (not B)) or (A and B);
    SMALL <= (not A ) and B;
end COMPARE_arch;