NDLI: An algorithm for simultaneous pin assignment and routing

Content Provider	IEEE Xplore Digital Library
Author	Hua Xiang Xiaoping Tang Wong, D.F.
Copyright Year	2001
Description	Author affiliation: Texas Univ., Austin, TX, USA (Hua Xiang)
Abstract	Macro-block pin assignment and routing are important tasks in physical design planning. Existing algorithms for these problems can be classified into two categories: 1) a two-step approach where pin assignment is followed by routing, and 2) a net-by-net approach where pin assignment and routing for a single net are performed simultaneously. None of the existing algorithms is "exact" in the sense that the algorithm may fail to route all nets even though a feasible solution exists. This remains to be true even if only 2-pin nets between two blocks are concerned. In this paper, we present the first polynomial-time exact algorithm for simultaneous pin assignment and routing for 2-pin nets from one block (source block) to all other blocks. In addition to finding a feasible solution whenever one exists, it guarantees to find a pin-assignment/routing solution with minimum cost /spl alpha//spl middot/W + /spl beta//spl middot/V, where W is the total wirelength and V is the total number of vias. Our algorithm has various applications and is applicable to both global and detailed routing with arbitrary routing obstacles on multiple layers. Experimental results demonstrate its efficiency and effectiveness.
Starting Page	232
Ending Page	238
File Size	1250043
Page Count	7
File Format	PDF
ISBN	0780372476
ISSN	10923152
DOI	10.1109/ICCAD.2001.968623
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Routing Pins Polynomials Costs Algorithm design and analysis Design engineering Very large scale integration Runtime Circuits Shape
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Computer Science Applications Software

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