Fast and Efficient Construction of BDDs by Reordering Based Synthesis

  • Authors:
  • A. Hett;R. Drechsler;B. Becker

  • Affiliations:
  • Institute of Computer Science, Albert-Ludwigs-University, 79110 Freiburg im Breisgau, Germany;Institute of Computer Science, Albert-Ludwigs-University, 79110 Freiburg im Breisgau, Germany;Institute of Computer Science, Albert-Ludwigs-University, 79110 Freiburg im Breisgau, Germany

  • Venue:
  • EDTC '97 Proceedings of the 1997 European conference on Design and Test
  • Year:
  • 1997

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Abstract

We present a new approach to symbolic simulation with BDDs. Our method uses Reordering Based Synthesis (RBS) which allows the integration of dynamic variable ordering (even) within a single synthesis operation (e.g. an AND-operation). Thus, huge peak sizes during the construction can often be avoided, and we obtain a method that, with no penalty in runtime, is more memory efficient than traditional ITE operator based symbolic simulation. The results are confirmed by experiments on a large set of benchmarks: We give a comparison to previously published approaches and also consider some industrial benchmarks which are known to be hard to handle.