Carry Look-Ahead Adders -- Three-Bit Example

c0 = g0 (4.35)

s0 = p0

c1 = g1 + p1c0

= g1 + p1g0 (4.36)

s1 = p1 ? c0

c2 = g2 + p2c1

= g2 + p2(g1 + p1g0)

= g2 + p2g1 + p2p1g0 (4.37)

s2 = p2 ? c1

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