Preprocessor Based Implementation of the Versatile Advection Code for Workstations, Vector and Parallel Computers

. The Versatile Advection Code is a single scientific software package designed and implemented to solve various hydrodynamic and magnetohydrodynamic problems typical of astrophysical research. It runs on workstations, and on vector and parallel supercomputers as well. The versatility for applications is ensured by the Loop Annotation Syntax preprocessor and the modular design of the software, while portability to different hardware platforms is achieved by the preprocessors that can translate the code from Fortran 90 both to High Performance Fortran and Fortran 77. Performance results are presented for several platforms. 1 Introduction The Versatile Advection Code (VAC) [1, 2] has been developed since 1994 as a general purpose tool for hydrodynamic and magnetohydrodynamic astrophysical applications. VAC uses various shock capturing numerical methods [3], explicit, semi-implicit, or fully implicit time stepping [4, 5] on 1, 2, or 3 dimensional finite volume grids. The software package..