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MIS: A Multiple-Level Logic Optimization System

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4 Author(s)
R. K. Brayton ; Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, USA ; R. Rudell ; A. Sangiovanni-Vincentelli ; A. R. Wang

MIS is both an interactive and a batch-oriented multilevel logic synthesis and minimization system. MIS starts from the combinational logic extracted, typically, from a high-level description of a macrocell. It produces a multilevel set of optimized logic equations preserving the input-output behavior. The system includes both fast and slower (but more optimal) versions of algorithms for minimizing the area, and global timing optimization algorithms to meet system-level timing constraints. This paper provides an overview of the system and a description of the algorithms used. Included are some examples illustrating an input language used for specifying logic and don't-cares. Parts on an industrial chip have been re-synthesized using MIS with favorable results as compared to equivalent manual designs.

Published in:

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:6 ,  Issue: 6 )