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STG optimisation in the direct mapping of asynchronous circuits

Lookup NU author(s): Dr Danil Sokolov, Dr Alex Bystrov, Professor Alex Yakovlev


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Direct mapping from Petri nets (PN) and Signal Transition Graphs (STG) avoids algorithmic complexity inherent in logic synthesis methods based on optimal state encoding. However it may lead to inefficient implementation, both in size and performance, due to excessive use of state-holding elements. This paper presents a set of tools that optimise logic produced by the direct mapping technique by means of: exposure of outputs, detection and elimination of redundant places. Output exposure is an approach to explicitly model output signals as STG places, which can be directly mapped into output flip-flops. The STG can be simplified after output exposure. The detection of redundant places is a computationally hard problem with multiple solutions. The tool solves this problem by using several heuristics aimed at speed and size. All operations preserve behavioural equivalence. The efficiency of the overall algorithm and individual heuristics is analysed using a number of benchmarks. (11 References).

Publication metadata

Author(s): Sokolov D, Bystrov A, Yakovlev A

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Design, Automation and Test in Europe Conference and Exhibition

Year of Conference: 2003

Pages: 932-937

ISSN: 0-7695-1870-2

Publisher: IEEE Computer Society


DOI: 10.1109/DATE.2003.1253725

Notes: Wehn N Verkest D Los Alamitos, CA, USA. 6th Design Automation and Test in Europe (DATE 03). Munich, Germany. EDAA. EDA Consortium. IEEE Comput. Soc. TTTC. IEEE Comput. Soc. DATC. ECSI. ACM/SIGDA. RAS. 3-7 March 2003.

Library holdings: Search Newcastle University Library for this item

ISBN: 15301591