Large-scale placement by grid-warping

Zhong Xiu, James D. Ma, Suzanne M. Fowler, Rob A. Rutenbar

Research output: Contribution to journalConference articlepeer-review


Grid-warping is a new placement algorithm based on a strikingly simple idea: rather than move the gates to optimize their location, we elasticaily deform a model of the 2-D chip surface on which the gates have been roughly placed, "stretching" it until the gates arrange themselves to our liking. Put simply: we move the grid, not the gates. Deforming the elastic grid is a surprisingly simple, low-dimensional nonlinear optimization, and augments a traditional quadratic formulation. A preliminary implementation, WARP1, is already competitive with most recently published placers, e.g., placements that average 4% better wirelength, 40% faster than GORDIAN-L-DOMINO.

Original languageEnglish (US)
Pages (from-to)351-356
Number of pages6
JournalProceedings - Design Automation Conference
StatePublished - 2004
Externally publishedYes
EventProceedings of the 41st Design Automation Conference - San Diego, CA, United States
Duration: Jun 7 2004Jun 11 2004


  • Algorithms
  • Placement

ASJC Scopus subject areas

  • Hardware and Architecture
  • Control and Systems Engineering


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