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VLSI Design
Volume 5 (1997), Issue 2, Pages 211-221

Layout Modeling and Design Space Exploration in Pss1 System

Department of Computer Science, University of California, Riverside, CA 92521, USA

Copyright © 1997 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents the design methodology used in PSS1, a high level synthesis system designed for computation dominated applications. It includes a behavior synthesizer and an area optimizer. Based on a pre-defined architecture, the behavior synthesizer translates a description into a number of designs with different delays and hardware costs. Based on a two-level layout model, the area optimizer fine-tunes the physical design using the information feedback from the layout tools. All the tools are linked by an X-window interface in which users can traverse among different tools and interactively change the design parameters. The output is linked to Lager system [7], a silicon assembler. The layout model allows a designer to interactively merge/split modules, change the shape of modules, and define the pin positions of modules. Experiments show that a considerable area improvement has been achieved using this methodology.