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A hierarchical placement method for standard cell layout based on wire length driven clustering

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3 Author(s)
Kubota, H. ; Dept. of Artificial Complex Syst. Eng., Hiroshima Univ., Japan ; Wakabayashi, S. ; Koide, T.

This paper presents a new hierarchical placement method for standard cell layout. The proposed method consists of three phases, clustering of cells, hierarchical global cluster placement, and detailed cell placement. First, a set of clusters is constructed considering their internal structures. When cluster placement is determined based on simulated annealing, the wire length between clusters is estimated based on the structural information of each cluster so as to produce a good cluster placement. In the detailed cell placement phase, cells are placed in rows according to the global cluster placement, and cell placement is iteratively improved to get a final cell placement. Experimental results based on benchmark data demonstrate the effectiveness of the proposed method.

Published in:

Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on  (Volume:3 )

Date of Conference:

25-28 July 2004