-- +-----------------------------+
-- |    Copyright 1996 DOULOS    |
-- |     Library: arithmetic     |
-- |    designer : Tim Pagden    |
-- |     opened: 28 Jul 1996     |
-- +-----------------------------+

-- Architectures:
--   28.07.96 low_level

library arithmetic;

architecture low_level of cla_25 is
  use arithmetic.cla_5_cmpt.all;

  -- signal c0 : std_logic_vector(21 downto 0);
  signal p0, g0, c1 : std_logic_vector(4 downto 0);

begin

  -- 0th rank, a set of 5 cla cells, 5-5-4-4-4 format
  i0_0: cla_5
  port map (
    c_in  => c_in,
    p     => p(4 downto 0),
    g     => g(4 downto 0),
    c     => c(4 downto 0),
    p_out => p0(0),
    g_out => g0(0)
  );

  i0_1: cla_5
  port map (
    c_in  => c1(0),
    p     => p(9 downto 5),
    g     => g(9 downto 5),
    c     => c(9 downto 5),
    p_out => p0(1),
    g_out => g0(1)
  );

  i0_2: cla_5
  port map (
    c_in  => c1(1),
    p     => p(14 downto 10),
    g     => g(14 downto 10),
    c     => c(14 downto 10),
    p_out => p0(2),
    g_out => g0(2)
  );

  i0_3: cla_5
  port map (
    c_in  => c1(2),
    p     => p(19 downto 15),
    g     => g(19 downto 15),
    c     => c(19 downto 15),
    p_out => p0(3),
    g_out => g0(3)
  );

  i0_4: cla_5
  port map (
    c_in  => c1(3),
    p     => p(24 downto 20),
    g     => g(24 downto 20),
    c     => c(24 downto 20),
    p_out => p0(4),
    g_out => g0(4)
  );

  -- 1st rank, a single cla cell
  i1_0: cla_5
  port map (
    c_in  => c_in,
    p     => p0,
    g     => g0,
    c     => c1,
    p_out => p_out,
    g_out => g_out
  );

end low_level;