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Reducing the Functionality Gap Between Auto-Vectorization and Explicit Vectorization

Compress/Expand and Histogram
  • Hideki SaitoEmail author
  • Serge Preis
  • Nikolay Panchenko
  • Xinmin Tian
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9903)

Abstract

Explicit vectorization of C/C++ and FORTRAN application programs are pioneered by Intel® Cilk™ Plus and then inherited and enhanced by OpenMP 4.0 and 4.5 standardization. There is a known functionality gap, where some auto-vectorizable code does not have adequate syntax support for explicit vector programming. In this paper, we propose and discuss a few syntax extensions to reduce the gap for compress/expand and histogram idioms, which are commonly seen in high performance computing.

Keywords

Compress Expand Histogram OpenMP omp ordered simd 

References

  1. 1.
    Intel Corporation. “Intel® Parallel Composer 2011 Users Guide”, October 2010Google Scholar
  2. 2.
    Tian, X., Saito, H., Girkar, M., Preis, S., Kozhukhov, S., Cherkasov, A., Nelson, C., Panchenko, N., Geva, R.: Compiling C/C ++ SIMD extensions for function and loop vectorization on multicore SIMD processors. In: Proceedings of the 2012 IPDPS Workshops & Ph.D. Forum (2012)Google Scholar
  3. 3.
    Klemm, M., Duran, A., Tian, X., Saito, H., Caballero, D., Martorell, X.: Extending OpenMP* with vector constructs for modern multicore SIMD architectures. In: Chapman, B.M., Massaioli, F., Müller, M.S., Rorro, M. (eds.) IWOMP 2012. LNCS, vol. 7312, pp. 59–72. Springer, Heidelberg (2012)CrossRefGoogle Scholar
  4. 4.
    OpenMP ARB. “OpenMP 4.0 Specifications”, July 2013Google Scholar
  5. 5.
    OpenMP ARB. “OpenMP 4.5 Specifications”, November 2015Google Scholar
  6. 6.
    Iverson, K.E.: A Programming Language. Wiley, New York (1962)CrossRefzbMATHGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Hideki Saito
    • 1
    Email author
  • Serge Preis
    • 1
  • Nikolay Panchenko
    • 1
  • Xinmin Tian
    • 1
  1. 1.Software and Solutions GroupIntel CorporationSanta ClaraUSA

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