Coherent optimization strategies for multilevel synthesis

It is shown that coherent optimization strategies for multilevel synthesis should rely on a good link between the factorization, the technology mapping and the netlist optimization. Factorization options are shown to play a key role. The technology mapping should optimize both area and critical path and only netlist structure preserving optimization techniques (buffer insertion, gate replication) should be applied first. Only in a last step resynthesis of critical areas based on a local view is applied. The approach has been experimented on set of large combinational benchmarks