ISEGEN: Generation of High-Quality Instruction Set Extensions by Iterative ImprovementReport as inadecuate

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1 CECS - Center for Embedded Computer Systems Irvine 2 School of Computer and Communication Sciences - EPFL

Abstract : Customization of processor architectures through Instruction Set Extensions ISEs is an effective way to meet the growing performance demands of embedded applications. A high-quality ISE generation approach needs to obtain results close to those achieved by experienced designers, particularly for complex applications that exhibit regularity: expert designers are able to exploit manually such regularity in the data flow graphs to generate high-quality ISEs. In this paper, we present ISEGEN, an approach that identifies high-quality ISEs by iterative improvement following the basic principles of the well-known Kernighan-Lin K-L min-cut heuristic. Experimental results on a number of MediaBench, EEMBC and cryptographic applications show that our approach matches the quality of the optimal solution obtained by exhaustive search. We also show that our ISEGEN technique is on average 20x faster than a genetic formulation that generates equivalent solutions. Furthermore, the ISEs identified by our technique exhibit 35% more speedup than the genetic solution on a large cryptographic application AES by effectively exploiting its regular structure.

Author: Partha Biswas - Sudarshan Banerjee - Nikil Dutt - Laura Pozzi - Paolo Ienne -



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