Fuzzy logic approach to VLSI placement

  • Authors:
  • Eric Q. Kang;Rung-Bin Lin;Eugene Shragowitz

  • Affiliations:
  • -;-;-

  • Venue:
  • IEEE Transactions on Very Large Scale Integration (VLSI) Systems - Special issue on low-power design
  • Year:
  • 1994

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Abstract

A contemporary definition of VLSI placement problem is characterized by multiple objectives. These objectives are: timing, chip area, interconnection length and possibly others. In this paper, fuzzy logic has been used to facilitate multiobjective decision-making in placement for standard cell design style. A placement process has been defined in terms of linguistic variables, linguistic values and membership functions. Various objectives have been related by hierarchical fuzzy logic rules implemented as object-oriented programming objects. It is demonstrated that a designed fuzzy logic system is flexible in selecting goals and considering tradeoffs. Details of implementation, experimental results and comparisons with other systems are provided.