Basic HTML version of Foils prepared 26 September 1996

Foil 18 Introduction to Fortran90 Arrays - I

From HPCC Software Technologies Fall 96 -- Overview and HPF Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 26 September 96. by Geoffrey C. Fox
Arrays are "true" objects in Fortran90 and are stored as values of elements plus a data descriptor!
There are operations on full arrays which have natural parallel implementations seen in HPF
New set of array intrinsic (built-in) functions for elements, reductions (process array into a single value), tranformational (reshaping)
  • Note these functions are NOT sufficient for real problems and must have FORALL to define new parallel Array functions
  • FORALL is in HPF but not F90 -- Expected in next round of standard (Fortran95)
  • FORALL( I=0:nx)
    • A(i) = (A(I+1)+A(I-1))/(I+1)
  • END FORALL

© Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

If you have any comments about this server, send e-mail to webmaster@npac.syr.edu.

Page produced by wwwfoil on Sun Feb 22 1998