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Abstract

A method for a logic optimization in a logic synthesis comprises the following steps. Prior to an actual execution of a logic flattening process, a scale of unoptimized circuits is estimated assuming that the unoptimized circuits have already been subjected to the logical flattening. The unoptimized circuits are subjected to a two-level logic optimization only when an estimated scale of the unoptimized circuits exceeds a predetermined threshold value. Prior to an actual execution of a logic flattening process, a scale of the optimized circuits is estimated assuming that the optimized circuits have already been subjected to the logic flattening. The optimized circuits are subjected to the logic flattening if an estimated scale of the optimized circuits does not exceed the predetermined threshold value.

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