A Heuristic Scheduler for Port-Constrained Floating-Point Pipelines

Autor: Zheming Jin, Jason D. Bakos
Jazyk: angličtina
Rok vydání: 2013
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Zdroj: International Journal of Reconfigurable Computing, Vol 2013 (2013)
Druh dokumentu: article
ISSN: 1687-7195
1687-7209
85494178
DOI: 10.1155/2013/849545
Popis: We describe a heuristic scheduling approach for optimizing floating-point pipelines subject to input port constraints. The objective of our technique is to maximize functional unit reuse while minimizing the following performance metrics in the generated circuit: (1) maximum multiplexer fanin, (2) datapath fanout, (3) number of multiplexers, and (4) number of registers. For a set of systems biology markup language (SBML) benchmark expressions, we compare the resource usages given by our method to those given by a branch-and-bound enumeration of all valid schedules. Compared with the enumeration results, our heuristic requires on average 33.4% less multiplexer bits and 32.9% less register bits than the worse case, while only requiring 14% more multiplexer bits and 4.5% more register bits than the optimal case. We also compare our results against those given by the state-of-art high-level synthesis tool Xilinx AutoESL. For the most complex of our benchmark expressions, our synthesis technique requires 20% less FPGA slices than AutoESL.
Databáze: Directory of Open Access Journals
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