Decomposition strategies and their performance in FPGA-based technology mapping

Existing FPGA-oriented algorithms can be divided into two categories: minimising the number of LUTs in the solution (MIS-pga, Trade, and ASYL); and minimising the delay in the solution (DAG-Map, SWEEP, and Flow-map). Several algorithms have been implemented with both area and delay minimisation versions, for example MIS-pga and ASYL. Two collaborating groups from Warsaw University of Technology, Poland and Monash University, Australia have developed decomposition theory and procedures for single and multiple-output Boolean functions. These include a balanced decomposition algorithm which applies either parallel or serial decomposition at each phase of the synthesis process. The algorithm has been implemented in an experimental logic synthesis tool DEMAIN. Recent tests on MCNC and industrial benchmarks show that DEMAIN produces much more economical designs than major FPGA vendors software.