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  5. Fast Compiled Logic Simulation Using Linear BDDs

Fast Compiled Logic Simulation Using Linear BDDs

File(s)
95-214.ps (394.48 KB)
95-214.pdf (266.71 KB)
Permanent Link(s)
https://hdl.handle.net/1813/5550
Collections
Cornell Theory Center Technical Reports
Author
Gupta, Sudeep
Pingali, Keshav
Abstract

This paper presents a new technique for compiled zero delay logic simulation, and includes extensive experiments that demonstrate its performance on standard benchmarks. Our compiler partitions the circuit into fanout-freeregions (FFRs), transforms each FFR into a linear sized BDD, and converts each BDD into executable code. In our approach, the computation is sublinear in the number of variables within each partition because only one path, from root to leaf, of the BDD is executed; therefore in many cases, substantial computation is avoided. In this way, our approach gets dome to the advantages of oblivious as well as demand-driven evaluation. We investigated the impact of the various heuristics on performance, and based on this data, we recommend good values for design parameters. A performance improvement of up to 67% over oblivious simulation is observed for our benchmarks.

Date Issued
1995-06
Publisher
Cornell University
Keywords
theory center
Previously Published as
http://techreports.library.cornell.edu:8081/Dienst/UI/1.0/Display/cul.tc/95-214
Type
technical report

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