NDLI: A new incremental placement algorithm and its application to congestion-aware divisor extraction

Content Provider	IEEE Xplore Digital Library
Author	Chatterjee, S. Brayton, R.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA (Chatterjee, S.; Brayton, R.)
Abstract	This work presents two contributions. The first is an incremental placement algorithm for placement-aware logic synthesis along with a proof of optimality. The algorithm can efficiently compute the optimum location for a newly introduced node in a network that minimizes the incremental increase in the total half-perimeter wire-length of the network. The algorithm can be applied in a variety of placement-aware optimization contexts. The second contribution is a specific application of this algorithm to placement-aware common divisor extraction. We evaluate the effectiveness of the proposed extraction procedure by using it in an otherwise non-placement-aware flow with two different final placers. The first flow uses an industrial congestion-driven placer and results in an average reduction of 21% in congestion as measured by the global router. The second flow uses an academic wire-length-driven placer and results in an average reduction of 11% for a tool-specific measure of congestion estimated from the placement. Our experiments also reveal a rather surprising phenomenon: in many cases the attempt to minimize the wire-length results in fewer literals after extraction than with a conventional literal-driven approach.
Starting Page	541
Ending Page	548
File Size	603708
Page Count	8
File Format	PDF
ISBN	0780387023
ISSN	10923152
DOI	10.1109/ICCAD.2004.1382637
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Network synthesis Wires Data mining Delay Logic design Computer networks Fluid flow measurement Very large scale integration Joining processes Timing
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Computer Science Applications Software

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