NDLI: Multiple clock domain synchronization in a QBF-based verification environment

Content Provider	IEEE Xplore Digital Library
Author	Maksimovic, D. Bao Le Veneris, A.
Copyright Year	2014
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada (Maksimovic, D.; Bao Le; Veneris, A.)
Abstract	Modern designs are growing in size and complexity, becoming increasingly harder to verify. Today, they are architected to include multiple clock domains as a measure to reduce power consumption. Verifying them proves to be a computationally intensive and challenging task as it requires their clocks to be synchronized. To achieve synchronization, existing Boolean satisfiability-based methodologies add hardware to combine the clock domains before transforming them into their iterative logic array representation (ILA). As a consequence, this results in the addition of redundant time-frames adding overhead during verification. This paper introduces a novel framework to verify designs with multiple clocks using Quantified Boolean Formula satisfiability (QBF). We first present a formulation that models an ILA representation with symbolic universal quantification to achieve synchronization. This is later extended with the use of a clock divider to overcome inefficiencies. The net effect is the reduction in the number of redundant time-frames. Furthermore, the usage of QBF results in significant memory savings when compared to traditional methods. Experiments on bounded model checking demonstrate memory reductions of 76% on average with competitive run-time performance.
Starting Page	684
Ending Page	689
File Size	588639
Page Count	6
File Format	PDF
ISBN	9781479962785
DOI	10.1109/ICCAD.2014.7001426
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-11-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synchronization Clocks Multiplexing Arrays Hardware Memory management Frequency-domain analysis
Content Type	Text
Resource Type	Article

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