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IRPF90: A Fortran Code Generator for High-Performance Computing

ALCF Seminar
Anthony Scemama, Laboratoire de Chimie et Physique Quantiques
July 13, 2017 11:00AM to 12:00PM
Building 240, Room 4301

Abstract: IRPF90 is a Fortran code generator thathelps the development of large Fortran codes. In Fortran programs, the programmer has to focus on the order of the instructions; before using a variable, the programmer has to be sure that it has already been computed in all possible situations. For large codes, this is a common source of error.

With IRPF90, most of the order of instructions is handled by the pre-processor, and a mechanism guarantees that every entity is built before being used. This mechanism relies on the {needs/needed by} relations between the entities, which are built automatically. The consequence is that the programmer does not need to know the production tree of each entity.

Codes written with IRPF90 execute usually faster than Fortran programs and are quicker to write and easier to maintain than standard Fortran programs.