Using the simple estimate of hardware speed above with gate delays, what is the relative performance of a ripple carry 8-bit add versus a 64-bit add using carry- lookahead logic? 1. A 64-bit...

Using the simple estimate of hardware speed above with gate delays, what is the relative performance of a ripple carry 8-bit add versus a 64-bit add using carry- lookahead logic?



1. A 64-bit carry-lookahead adder is three times faster: 8-bit adds are 16 gate delays and 64-bit adds are 7 gate delays.

2. They are about the same speed, since 64-bit adds need more levels of logic in the 16-bit adder.

3. 8-bit adds are faster than 64 bits, even with carry lookahead.