Abstract
Field Programmable Gate Arrays (FPGAs) are becoming an appealing technology in datacenters and High Performance Computing. High-Level Synthesis (HLS) of multi-threaded parallel programs is increasingly used to extract parallelism. Despite great leaps forward in HLS and related debugging methodologies, there is a lack of contributions in automated bug identification for HLS of multi-threaded programs. This work defines a methodology to automatically detect and isolate bugs in parallel circuits generated with HLS. The technique relies on hardware/software Discrepancy Analysis and exploits a pattern-matching algorithm based on Finite State Automata to compare multiple hardware and software threads. Overhead, advantages, and limitations are evaluated on designs generated with an open-source HLS compiler supporting OpenMP.
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