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Next: Unanchored Distribution Formats
Up: High Performance Fortran Journal Previous: User-Specified Default Distributions
A programmer might wish to dictate the
distribution format for some axes of a template while leaving
to the language processor the choice of distribution format for
other axes. The specific suggestion would allow a dist-format
to be empty. For example,
!HPF DISTRIBUTE A(BLOCK,,*,) ONTO SCORPROCS
would dictate BLOCK distribution for the first axis and
on-processor distribution for the third axis, leaving the choice
of distribution formats for the second and fourth axes to the compiler.
An alternate suggestion was that, as there was no precedent in Fortran 90 for such syntactically empty list items, some explicit token such as ? should be chosen.
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