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1998
ACM

On wirelength estimations for row-based placement

9 years 8 months ago
On wirelength estimations for row-based placement
Wirelength estimation in VLSI layout is fundamental to any pre-detailed routing estimate of timing or routability. In this paper, we develop e cient wirelength estimation techniques appropriate for wirelength estimation during topdown oorplanning and placement of cell-based designs. Our methods give accurate, linear-time approaches, typically with sublinear time complexity for dynamic updating of estimates e.g., for annealing placement. Our techniques o er advantages not only for early on-line wirelength estimation during top-down placement, but also for a posteriori estimation of routed wirelength given a nal placement. In developing these new estimators, we have made several contributions, including i insight into the contrast between region-based and bounding box-based RStMT estimation techniques; ii empirical assessment of the correlations between pin placements of a multi-pin net that is contained in a block; and iii new wirelength estimates that are functions of a block&...
Andrew E. Caldwell, Andrew B. Kahng, Stefanus Mant
Added 05 Aug 2010
Updated 05 Aug 2010
Type Conference
Year 1998
Where ISPD
Authors Andrew E. Caldwell, Andrew B. Kahng, Stefanus Mantik, Igor L. Markov, Alexander Zelikovsky
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