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-- VHDL structural description generated from `halfadder`
--              date : Sat Sep  8 00:30:52 2001


-- Entity Declaration

ENTITY halfadder IS
  PORT (
  a : in BIT;   -- a
  b : in BIT;   -- b
  cout : out BIT;       -- cout
  sout : out BIT;       -- sout
  vdd : in BIT; -- vdd
  vss : in BIT  -- vss
  );
END halfadder;

-- Architecture Declaration

ARCHITECTURE VST OF halfadder IS
  COMPONENT xr2_x1
    port (
    i0 : in BIT;        -- i0
    i1 : in BIT;        -- i1
    q : out BIT;        -- q
    vdd : in BIT;       -- vdd
    vss : in BIT        -- vss
    );
  END COMPONENT;

  COMPONENT a2_x2
    port (
    i0 : in BIT;        -- i0
    i1 : in BIT;        -- i1
    q : out BIT;        -- q
    vdd : in BIT;       -- vdd
    vss : in BIT        -- vss
    );
  END COMPONENT;


BEGIN

  sout : xr2_x1
    PORT MAP (
    vss => vss,
    vdd => vdd,
    q => sout,
    i1 => a,
    i0 => b);
  cout : a2_x2
    PORT MAP (
    vss => vss,
    vdd => vdd,
    q => cout,
    i1 => a,
    i0 => b);

end VST;