A data-structuring technique for gridded VLSI layouts

  • Authors:
  • Saleem M. Haider;Peng H. Ang

  • Affiliations:
  • Western Software Lab, Digital Equipment Corp., Palo Alto, CA;Systems Research Lab, LSI Logic Corp., Menlo Park, CA

  • Venue:
  • EURO-DAC '90 Proceedings of the conference on European design automation
  • Year:
  • 1990

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Abstract

This paper presents the LINKED ARRAY data structure for storing rectangular structures which are constrained to a grid. The data structure is particularly useful in integrated layout systems for VLSI technologies like gate-arrays; it is also useful for building schematic editors. This data structure has been used to implement a prototype layout system which has significant memory usage and timing response advantages for large layouts (~ 100,000 used gates, running on a workstation like SUN 3/260). The paper describes how the data structure is created, how it operates, and how it compares with existing mechanisms.