A BBL Placement Algorithm Incorporating Two Hierarchical Design Methods
一种有效地综合两种分级设计方法的BBL布局算法

This paper presents a new approach for building block placement.The main idea is theintroduction of multi-target shapes in the placement procedure, which incorporates the bottomupand top-down design manners effectively and make the placement results be satisfactoryThis placement algorithm has been implemented in C language.This placement system is runningsteadily on SUN 3/60, VAX-785, HP 9000-800 and GPX computers under the UNIXoperating system.The experimental results show our placement apporach outperforins theBEAR placement algorithm.Our placement system is a subsystem of national VLSICAD system(named PANDA system) being developed.