Carry-skip calculates the result for groups of bits rather than each bit individually. Again, it will reduce gate delays, at the cost of real estate. The actual Z80 implementation uses a mix of ...

This paper focuses on the implementation and simulation of 4-bit, 8-bit and 16-bit carry look-ahead adder based on Verilog code and compared for their performance in Xilinx.

This paper investigates four types of carry-tree adders the Brent-Kung, Kogge-Stone, the Slansky and Han-Carlson adder and compares them to the simple Ripple Carry Adder (RCA).