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一种基于敏感度的时延驱动快速布局算法
A Sensitivity-Based Timing-Driven Fast Placement Algorithm
【摘要】 本文提出了一种基于敏感度的时延驱动的快速布局算法.该算法在解方程和单元扩散这两个阶段同时优化关键线网时延.其中基于敏感度的线网权重模型用于解方程阶段,基于关键路径的启发式单元优化算法用于单元扩散阶段.静态时延分析工具Astro分析结果表明:与FastPlace相比,最小负松弛量(worst negative slack)平均提高了25.82%,负松弛量总和(total negative slack)平均提高了20.53%,同时总线长仅平均增加3.14%且运行时间没有明显增加.
【Abstract】 This paper presents a sensitivity-based timing-driven fast placement algorithm,which considers the critical net delay optimization in both the equation solving stage and the cell shifting stage.A sensitivity net-based weighting model is used in equation solving stage and a heuristic critical path based algorithm is used in cell shifting stage.Experimental results show that worst negative slack (WNS) and total negative slack(TNS) are improved by 25.82% and 20.53% respectively using the static timing analysis tool Astro.Meanwhile,average wire length is only increased by 3.14% and the runtime is not increased significantly in comparison with FastPlace.
- 【文献出处】 电子学报 ,Acta Electronica Sinica , 编辑部邮箱 ,2012年12期
- 【分类号】TN402
- 【被引频次】2
- 【下载频次】91