专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07073144B2 Stability metrics for placement to quantify the stability of placement algorithms 有权
标题翻译：放置的稳定性指标来量化放置算法的稳定性
公开(公告)号：US07073144B2
公开(公告)日：2006-07-04
申请号：US10825148
申请日：2004-04-15
申请人： Charles Jay Alpert , Gi-Joon Nam , Paul Gerard Villarrubia , Mehmet Can Yildiz
发明人： Charles Jay Alpert , Gi-Joon Nam , Paul Gerard Villarrubia , Mehmet Can Yildiz
IPC分类号： G06F17/50
CPC分类号： G06F17/5072
摘要： A method of assessing the stability of a placement tool used in designing the physical layout of an integrated circuit chip, by constructing different layouts of cells using the placement tool with different sets of input parameters, and calculating a stability value based on the movement of respective cell locations between the layouts. The stability value can be normalized based on cell locations in a random placement. One stability metric measures absolute movement of individual cells in the layouts, weighted by cell area. The cell movements can be squared in calculating the stability value. Another stability metric measures the relative movement of cells with respect to their nets. Shifting of cells and symmetric reversal of cells about a net center does not contribute to this relative movement, but spreading of cells and rotation of cells with respect to the net center does contribute to the relative movement. Relative cell movements can again be squared in calculating the stability value. Many different layouts can be designed using the same placement tool with a range of different input parameters and different movement metrics to build a collection of comparative values that can be used to identify stability characteristics for that tool.
摘要翻译：一种评估用于设计集成电路芯片的物理布局的放置工具的稳定性的方法，通过使用具有不同输入参数集合的放置工具构造不同的单元布局，以及基于相应的运动来计算稳定性值单元格位置之间的布局。稳定性值可以根据随机位置中的单元格位置进行归一化。一个稳定度度量衡量单元格在布局中的绝对运动，由单元格区域加权。在计算稳定性值时，单元格移动可以平方。另一个稳定度量度衡量细胞相对于网的相对运动。细胞的移位和细胞对网络中心的对称反转对这种相对运动没有贡献，但是细胞的扩散和细胞的相对于网络中心的旋转确实有助于相对运动。在计算稳定性值时，相对单元移动可以再次平方。可以使用具有一系列不同输入参数和不同运动度量的相同放置工具来设计许多不同的布局，以构建可用于识别该工具的稳定性特征的比较值集合。

IPRDB

热门服务

关于我们

友情链接

联系方式