PARALLELIZATION IN AN HPF LANGUAGE PROCESSOR

We have developed an HPF (High Performance Fortran) language processor for SX-4 series, aimed at distributed memory multiprocessor systems. HPF is a de facto standard data-parallel language mainly aimed at dist ributed memory multiprocessor systems. HPF allows users to develop par allelized programsdby only specifying how to map data onto processors. The HPF compiler partitions computation among processors based on spe cified mapping information, and generates necessary data transfers. Th erefore, both how to map computation onto processors and how to achiev e high-speed data transfer are important for the efficient implementat ion of HPF compilers. This paper describes automatic parallelization a nd data transfer technology in NEC's HPF language processor. This pape r also discusses the utilization of shared memory parallelization and vectorization on SX-4 and SX-5 series.