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The Sklansky Adder is not as heavily impacted by wire delay in comparison to similar prefix adder such as Kogge-Stone. We assume the critical path in an adder is determined by the time required to pass the carry-bit from the least significant bit to most significant bit,illustrates the critical path of Sklansky adder.







The sutra we will be making use of in this series is the “Nikhilam Navatashcaramam Dashatah”, which translates to “All From 9 the Last From 10.”


The reason we use this formula because the complexity will be diminished by this. What we will be doing here is subtracting numbers from bases such as 10, 100, 1000, etc. using “All From 9 the Last From 10.” In this case “Last” refers to the last digit of the number you are subtracting, and “All” corresponds to all the previous digits in the number you are subtracting.