Faster goal-oriented shortest path search for bulk and incremental detailed routing

• 成果类型: Article
• 署名作者: Ahrens, Markus; Henke, Dorothee; Rabenstein, Stefan; Vygen, Jens
• 署名单位: Dortmund University of Technology; University of Bonn
• 刊物名称: MATHEMATICAL PROGRAMMING
• ISSN/ISSBN: 0025-5610
• DOI: 10.1007/s10107-023-01962-4
• 发表日期: 2024
• 页码: 3-32
• 关键词: point location

摘要

We develop new algorithmic techniques for VLSI detailed routing. First, we improve the goal-oriented version of Dijkstra's algorithm to find shortest paths in huge incomplete grid graphs with edge costs depending on the direction and the layer, and possibly on rectangular regions. We devise estimates of the distance to the targets that offer better trade-offs between running time and quality than previously known methods, leading to an overall speed-up. Second, we combine the advantages of the two classical detailed routing approaches-global shortest path search and track assignment with local corrections-by treating input wires (such as the output of track assignment) as reservations that can be used at a discount by the respective net. We show how to implement this new approach efficiently.