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A practical cut-based physical retiming algorithm for field programmable gate arrays

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3 Author(s)
Suaris, P. ; Mentor Graphics Corp., Wilsonville, OR, USA ; Dongsheng Wang ; Nan-Chi Chou

This paper presents a heuristic cut-based retiming algorithm for FPGA designs. It handles complex retiming constraints including timing, architectural and structural constraints; improves retimeability by incorporating logic resynthesis; and efficiently integrates with incremental placement. Thus, the algorithm improves timing compliance by allowing groups of registers to be rapidly retimed across blocks of combinational logic in the physical domain without violating any complex constraints. Experiments have shown that this algorithm can improve the performance of FPGA designs by 16% on average, while achieving a 61.7% speedup in terms of runtime compared with classic retiming algorithms.

Published in:

Design Automation Conference, 2005. Proceedings of the ASP-DAC 2005. Asia and South Pacific  (Volume:2 )

Date of Conference:

18-21 Jan. 2005

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