Carry Look-Ahead Addition

A B Cin S Cout

0 0 0 0 0

0 0 1 1 0

0 1 0 1 0

0 1 1 0 1

1 0 0 1 0

1 0 1 0 1

1 1 0 0 1

1 1 1 1 1

Pi = Ai?? Bi

=> Ci = Gi + PiCi-1

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