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| From: | "James J. Weinkam" <jjw@cs.sfu.ca> |
| Newsgroups: | comp.compilers,comp.lang.pl1 |
| Date: | Mon, 20 Aug 2007 05:12:19 GMT |
| Organization: | Compilers Central |
| References: | 07-08-01607-08-021 07-08-024 07-08-034 07-08-037 07-08-040 07-08-041 07-08-044 07-08-051 |
| Keywords: | parallel, PL/I |
| Posted-Date: | 20 Aug 2007 09:48:49 EDT |
Peter Flass wrote:
>
> Thanks for the reply. I guess I'll have to dig out the standard and
> see how it actually reads. Given the choice, however, I'm going for
> compatibility with the IBM compilers,
If you are going to have array expressions and assignments compatible with the
current IBM compilers then according to the Enterprise LRM:
1. Array expressions are evaluated element by element in row major order, and
2. An array assignment is equivalent to a set of nested loops which effectively
perform a series of scalar assignments in row major order.
This obviates the need for array temporaries except for the final result of an
array expression.
The description in the Enterprise manual is essentially identical to that which
appeared in the F and Optimizer reference manuals back in th 60's and 70's.
For both array expressions and array assignments all arrays involved must have
the same number of dimensions and identical bounds.
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