Fast algorithm for performance-oriented Steiner routing

We present a routing algorithm which minimizes the Elmore delay to the identified critical sinks while producing routes comparable to the best previously existing Steiner router. Since performance oriented layout generators employ iterative techniques that require a large number of calls to the routing algorithm for layout evaluation, a fast algorithm for routing is desirable. Our algorithm has a fast (O(n/sup 2/), where n is the number of points) and practical implementation using simple data structures and techniques. Comparisons with other existing algorithms are presented along with results from a performance driven layout generator using our routing algorithm.