A novel fixed-outline floorplanner with zero deadspace for hierarchical design

Ou He, Sheqin Dong, Jinian Bian, Satoshi Goto, Chung Kuan Cheng

    研究成果: Conference contribution

    22 被引用数 (Scopus)

    抄録

    Fixed-outline floorplanning, which enables hierarchical design, is considered more and more important nowadays. In this paper, a novel SA-based Fixed-outline Floorplanner with the Optimal Area utilization named SAFFOA is introduced to improve the total wirelength. The basic idea is to build and solve a group of four quadratic equations in four variables iteratively, which can handle the fixed-outline constraint of any aspect ratio. A new topological representation called Ordered Quadtree is then custom-made for this basic idea to facilitate its integration into SA iterations. After the fixed-outline constraint with 100% area utilization is achieved, we will solve the tradeoff between the chip area and wirelength and thus concentrate on the latter in SA process. Experimental results show that the chip wirelength is decreased by about 16.8% and 8.6% on average, compared with two previous fixed-outline floorplanners on soft modules, which are both proved to be better than Parquet. Besides, our method is still competitive on the wirelength, even if compared with some leading-edge outline-free floorplanners. At last, Local Refinement is also adopted to guide the SA process and reshape soft modules to meet the constraint on their aspect ratios (ARs). With its help, SAFFOA can still generate feasible floorplans with no deadspace under a strict AR constraint such as [0.5,2].

    本文言語English
    ホスト出版物のタイトルIEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers, ICCAD
    ページ16-23
    ページ数8
    DOI
    出版ステータスPublished - 2008
    イベント2008 International Conference on Computer-Aided Design, ICCAD - San Jose, CA
    継続期間: 2008 11 102008 11 13

    Other

    Other2008 International Conference on Computer-Aided Design, ICCAD
    CitySan Jose, CA
    Period08/11/1008/11/13

    ASJC Scopus subject areas

    • Computer Graphics and Computer-Aided Design
    • Computer Science Applications
    • Software

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