On carry-save strategies for multiply-accumulate arithmetic

  • Authors:
  • David Neuhäuser;Eberhard Zehendner

  • Affiliations:
  • Friedrich Schiller University, Department of Computer Science, Jena, Germany;Friedrich Schiller University, Department of Computer Science, Jena, Germany

  • Venue:
  • CSCC'11 Proceedings of the 2nd international conference on Circuits, Systems, Communications & Computers
  • Year:
  • 2011

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Abstract

It is well known that multipliers using Dadda trees need less area and still can be faster than Wallace trees when considering different latencies on the paths through the counters used for reduction. In our contribution we show that for multiply-accumulate units, a hybrid strategy based on both Wallace and Dadda reduction can easily outperform pure Dadda trees.