COHERENT OPTIMIZATION STRATEGIES FOR MULTILEVEL SYNTHESIS

This paper shows that coherent optimization strategies for multilevel systhesis should rely on a good link between the factorization, the te chnology mapping and the netlist optimization. Factorization options a re shown to play a key role. The technology mapping should optimize bo th area and critical path and only ''netlist structure preserving'' op timization techniques (buffer insertion, gate replication) should be a pplied first to preserve the factorization decision. Only in a last st ep resynthesis of critical areas based on a local view is applied. The approach has been experimented on a set of large combinational benchm arks.