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A robust solution to the timing convergence problem in high-performance design

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6 Author(s)
N. Shenoy ; Synopsys Inc., Mountain View, CA, USA ; M. Iyer ; R. Damiano ; K. Harer
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Traditional ASIC design flows have treated logic synthesis and physical design as separate steps in the flow. A recent trend in design automation has been to integrate placement and logic synthesis operations for designs that strive for high performance. The motivation for this is ascribed to achieving timing convergence. These efforts attempt a brute-force combination of techniques from the two fields. We present an architecture for combining synthesis transforms with rough placement. There are three main contributions of this paper. First we present a system architecture that permits a clean separation of placement and synthesis issues and combines the two solutions in an elegant manner. Second, we propose a minor modification to the current ASIC design flow to enable timing convergence. Third, we use design rules for correct circuit operation to drive the placement and the synthesis components of the system. We present results for a set of high performance ASIC designs which demonstrate the practicality of our method

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Computer Design, 1999. (ICCD '99) International Conference on

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