一种新的基于查找表的时钟性能驱动的增量式布局算法

提出了一种新的时钟性能驱动的增量式布局算法,它针对目前工业界较为流行的标准单元布局,应用查找表模型来计算延迟.由于在布局阶段较早地考虑到时钟信息,可以通过调整单元位置,更有利于后续的有用偏差时钟布线和偏差优化问题.来自于工业界的测试用例结果表明,该算法可以有效地改善合理偏差范围的分布,而对电路的其它性能影响很小.

A New Clock-Driven ECO Placement Algorithm Based on Table-Lookup Delay Model

A new clock-driven ECO placement algorithm is presented for standard-cell layout design based on the table-lookup delay model.It considers useful clock skew information in the placement stage.It also modifies the positions of cells locally to make better preparation for the clock routing.Experimental results show that with little influence to other circuit performance,the algorithm can improve permissible skew range distribution evidently.