-- +-----------------------------+
-- |     Library: arithmetic     |
-- |    designer : Tim Pagden    |
-- |     opened: 17 Aug 1995     |
-- +-----------------------------+
 
-- Architectures:
--   17.08.95 original
 
library cell_library;
 
architecture original of cla_3 is
 
begin
 
  p_c0: process (p(0), g(0), c_in)
  begin
    c(0) <= (p(0) and c_in) or 
            g(0);
  end process;

  p_c1: process (p(1 downto 0), g(1 downto 0), c_in)
  begin
    c(1) <= (p(1) and p(0) and c_in) or 
            (p(1) and g(0)) or  
            g(1); 
  end process;

  p_c2: process (p(2 downto 0), g(2 downto 0), c_in)
  begin
    c(2) <= (p(2) and p(1) and p(0) and c_in) or 
            (p(2) and p(1) and g(0)) or
            (p(2) and g(1)) or 
            g(2); 
  end process;

  p_propogate: process (p)
  begin
    p_out <= p(0) and p(1) and p(2);
  end process;
 
  p_generate: process (p(2 downto 1), g)
  begin
    g_out <= (p(2) and p(1) and g(0)) or 
             (p(2) and g(1)) or 
             g(2);
  end process; 
 
end original;

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