5 tick 16 bit solid state adder

[Cutlassw30]

Ooh fancy What exactly is the difference between a "Proper look ahead adder" and an LFA. Does it take advantage of some CLE logic to reach later bits while still using mostly BK cells? (This is how I've heard it)

PLA logic uses a lot of things. For one it uses 1 tick BK cells in alternating inverted inputs and inverted outputs. Then it combines the first and second stages into 1 stage. And it dose use CLE carry lines for the propagate calculations.