Ripple: A robust and effective routability-driven placer
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摘要The significant mismatch between the objective of wirelength and routing congestion makes the routability issue even more important in placement. In this paper, we describe a routability-driven placer called Ripple. Each step, including global placement, legalization, and detailed placement, is made to trade-off between routability and wirelength. We propose a robust and effective flow by using cell inflation to relieve routing congestion. Cell inflation has traditionally been used to deal with congestion and we will discuss how this technique can be used easily and robustly in the global placement. Besides, unlike many previous works that focus on different types of swapping strategies, we analyze and propose some simple and effective approaches when considering routability in the legalization and detailed placement steps. Experimental results show that Ripple is particularly effective in improving routability. When compared to the top results in the ISPD 2011 Contest and SimPLR, Ripple can obtain the smallest overflow and half-perimeter wirelength on average, while the congestion hot spots are also distributed sparsely in Ripple. © 2013 IEEE.
著者He X., Huang T., Xiao L., Tian H., Young E.F.Y.
期刊名稱IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
出版年份2013
月份9
日期30
卷號32
期次10
出版社Institute of Electrical and Electronics Engineers
出版地United States
頁次1546 - 1556
國際標準期刊號0278-0070
電子國際標準期刊號1937-4151
語言英式英語
關鍵詞Placement and routing

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