Hitachi, Ltd.

Kazuhiko Eguchi

Ko Miyazaki

Tadaaki Tanimoto

The optimization algorithm candidate of a plurality of circuit blocks given with the logic circuit description based on the hardware description language is determined considering the Hamming distance of circuit block (S to S ). The common circuit blocks of the optimization algorithm candidate determined in the first process are then grouped considering the coupling degree among circuit blocks (S to S ). Result of grouping is the result for the circuit blocks having apparent characteristic in the algorithm candidate and coupling degree and the circuit blocks having uncertain characteristics are also left. In view of optimizing the grouping for the circuit blocks having uncertain characteristics, the grouping of a plurality of circuit blocks is optimized with the hereditary algorithm by reflecting the result of grouping on the initial condition. Thereby, the logical composition for the logic circuit description based on the hardware description language can be optimized and the necessary time can be shortened.

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Nagoya, Japan

Kazuhiko Eguchi