TUTCRIS - Tampereen teknillinen yliopisto


AEx: Automated Customization of Exposed Datapath Soft-Cores



OtsikkoProceedings - Euromicro Conference on Digital System Design, DSD 2019
ToimittajatNikos Konofaos, Paris Kitsos
ISBN (elektroninen)9781728128610
DOI - pysyväislinkit
TilaJulkaistu - elokuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaEuromicro Conference on Digital System Design - Kallithea, Chalkidiki, Kreikka
Kesto: 28 elokuuta 201930 elokuuta 2019


NimiProceedings - Euromicro Conference on Digital System Design, DSD 2019


ConferenceEuromicro Conference on Digital System Design
KaupunkiKallithea, Chalkidiki


High-level synthesis tools aim to produce hardware designs out of software descriptions with a goal to lower the bar in FPGA usage for software engineers. Despite their recent progress, however, HLS tools still require FPGA target specific pragmas and other modifications to the originally processor-targeting source code descriptions. Customized soft core based overlay architectures provide a software programmable layer on top of the FPGA fabric. The benefit of this approach is that a platform independent compiler target is presented to the programs, which lowers the porting burden, and online repurposing the same configuration is natural by just switching the executed program. The main drawback, like with any overlay architecture, are the additional implementation overheads the overlay imposes to the resource consumption and the maximum operating frequency. In this paper we show how by utilizing the efficient structure of Transport-Triggered Architectures (TTA), soft-cores can be customized automatically to benefit from the flexible FPGA fabric while still presenting a comfortable software layer to the users. The results compared to previously published non-specialized TTA soft cores indicate equal or better execution times, while the program image size is reduced by up to 49%, and overall resource utilization improved from 10% to 60%.