Layout compaction with attractive and repulsive constraints

  • Authors:
  • Akira Onozawa

  • Affiliations:
  • NTT LSI Laboratories, Atsugi-shi, Kanagawa, 243-01, Japan

  • Venue:
  • DAC '90 Proceedings of the 27th ACM/IEEE Design Automation Conference
  • Year:
  • 1991

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Abstract

A one-dimensional compaction algorithm with attractive and repulsive constraints is proposed. Depending on these constraints, the proposed algorithm shrinks[expands] the spaces among the specified layout elements without causing any design rule violations, as if some force were affecting them. It implies that the resultant layout has less cross talk and delay. The proposed network simplex algorithm experimentally proves to be efficient in both time and space.