Co-Array Collectives: Refined Semantics for Co-Array Fortran

Co-array notation provides a compact syntax for programming parallel programs. Co-array Fortran (CAF) introduced and implements this notation, and CAF is currently proposed as an extension to the Fortran language standard. We believe that co-array notation requires a revised semantic definition beyond that specified by CAF for both pragmatic reasons within Fortran and to make the notation attractive for incorporation into other programming languages. The revised semantics make the language model easier to understand and reduces the potential for programmer error. Furthermore, these revised semantics allow CAF to be extended to capture collective operations in co-array notation.

Authors and Affiliations

1. Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

   Matthew J. Sottile, Craig E Rasmussen & Richard L. Graham

Editors and Affiliations

1. Advanced Computing and Emerging Technologies Centre, The School of Systems Engineering, University of Reading, RG6 6AY, Reading, United Kingdom

   Vassil N. Alexandrov

2. Department of Mathematics and Computer Science, University of Amsterdam, Kruislaan 403, 1098, SJ Amsterdam, The Netherlands

   Geert Dick van Albada

3. Faculty of Sciences, Section of Computational Science, University of Amsterdam, Kruislaan 403, 1098, SJ Amsterdam, The Netherlands

   Peter M. A. Sloot

4. Computer Science Department, University of Tennessee, TN 37996-3450, Knoxville, USA

   Jack Dongarra

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