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    • 3. 发明授权
    • Method and apparatus for hierarchical global routing descend
    • 分级全局路由下降的方法和装置
    • US06175950B1
    • 2001-01-16
    • US09062217
    • 1998-04-17
    • Ranko ScepanovicAlexander E. AndreevElyar E. GasanovPedja Raspopovic
    • Ranko ScepanovicAlexander E. AndreevElyar E. GasanovPedja Raspopovic
    • G06F1750
    • G06F17/5077
    • Net routing is optimized in an integrated circuit device by dividing an integrated circuit design with a first group of substantially parallel lines in a first direction and with a group of substantially parallel lines in a second direction, with the second direction being substantially perpendicular to the first direction. A first routing graph is formed with vertices corresponding to locations where lines in the first direction and lines in the second direction cross, and nets are globally routed as a function of the first routing graph. The integrated circuit design is further subdivided with a second group of substantially parallel lines in the first direction, and a second routing graph is formed with vertices corresponding to locations where lines in the first and second groups of substantially parallel lines in the first direction cross lines in the group of substantially parallel lines in the second direction. For a net globally routed using the first routing graph, a first local net is formed in a first fragment of the second routing graph, and the first local net is rerouted within the first fragment by computing edge penalty values for edges in the first fragment and rerouting the first local net as a function of the edge penalty values.
    • 通过将集成电路设计与第一方向上的第一组基本上平行的线分隔开并且在第二方向上与一组基本上平行的线分开,使得第二方向基本上垂直于第一方向 方向。 第一路由图形成为与第一方向上的线和第二方向上的线交叉的位置相对应的顶点,并且网络作为第一路由图的函数被全局路由。 集成电路设计在第一方向上被进一步细分为第二组基本上平行的线,并且第二路由图形成为与第一方向交叉线上的基本上平行的第一组和第二组中的线对应的顶点 在第二方向上基本平行的线组。 对于使用第一路由图全局路由的网络,在第二路由图的第一片段中形成第一本地网,并且通过计算第一片段中的边缘的边缘惩罚值,在第一片段内重新路由第一本地网, 作为边缘惩罚值的函数重新路由第一个本地网络。