VS FORTRAN

VS FORTRAN is a full-function product that includes support for the ES/3090 Vector Facility and expanded support for the ES/9000 Vector Facility. In addition, it performs vector and parallel processing plus standard sequential (serial) processing all within a single program.

VS FORTRAN provides three products in one: a compiler, library, and interactive debugging facilities. They offer extensive usability, productivity, and performance enhancements, including:

• Highly optimized scalar processing for high serial program performance

• Vector processing for superior vector performance on the ES/3090 Vector Facility

• Expanded processing for enhanced vector performance on the ES/9000 Vector Facility

• Automatic parallelism and explicit parallel language support for reduced turnaround time for applications on IBM multiprocessing hardware

• I/O data striping for faster execution of sequential I/O on IBM OS/390®

• Greater flexibility in creating and managing parallel programs

• Ability for OS/390 users to specify the number of I/O buffers to be used on a unit-by-unit basis

• 225 buffers allowed and maintained by the library I/O routines and buffer residency above the 16 MB area when operating on OS/390 using DFSMS 1.1 or greater

• Data-in-virtual support for OS/390

• Extended common blocks exploiting the ESA/390 data spaces facility for larger program storage for MVS/ESA and VM/ESA

• Compliance with the FORTRAN 77 language standard

• Expanded compatibility with the RISC System/6000 XL Fortran language for improved cross-platform and host-workstation cooperation

• Inclusion of industry-standard extensions to Fortran to provide multi-vendor compatibility

• Support for extended-precision (64-bit) integers

• Ability to package program modules independently and load these modules dynamically as needed to reduce program module complexity and simplify program maintenance