Design of a low-latency asynchronous adder using speculative completion

A new general method for designing asynchronous datapath components, called speculative completion, is introduced. The method has many of the advantages of a bundled data approach, such as the use of single-rail synchronous datapaths, but it also allows early completion. As a case study, the method is applied to the high-performance parallel BLC adder design of Brent and Kung (1982). Through careful gate-level analysis, performance improvements of up to 30% over a comparable synchronous implementation are expected