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 pr es ented 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 performa nce,the algorithm can improve permissible skew range distribution evidently.