: 81/2 is a declarative data-parallel language designed for the simulation of large dynamical systems. Such simulations are of growing importance and they requires more and more computing power. In consequence, 81/2 introduces a new entity, the web, that combines features of collection-oriented and data-flow language to express data-, stream- and control-parallelism. In this paper, we present the language 81/2, some examples of dynamical systems programmed in 81/2 and we describe the compilation process of a 81/2 programme. Key-words: data-parallelism, collection-oriented languages, declarative languages, synchronous data-flow languages, simulation of dynamical systems. I. Introduction Nowadays, simulation of large dynamical systems represents the majority of supercomputers applications. In this article, a dynamical system refers as any application that modelizes space-time phenomena. Three usual examples are: . numerical resolution of partial differential equations [1] describing con...

We advocate a data-flow approach to data-parallelism to ensure both parallelism expressiveness and efficient exploitation of data-parallel applications on new massively parallel architectures. The rational of this approach is introduced in the first part of the paper. Then we develop an experimental language following these lines and sketch the techniques used to compile such a data-flow data-parallel language. Its compilation, based upon a static execution model enabling an efficient execution of programs, is introduced. 1. The Parallelism and its Expression Through Data 1.1. A Short Taxonomy of Parallelism Expression in Programming Languages The many existing models and languages for parallel programming lead to an overlap of concepts making the design of a taxonomy a hard task. However, we propose in table 1 a framework used to specify the concepts presented in this paper. Two criteria have been selected to classify the languages: the way they let the programmer express control an...

8 ½, an experimental language combining features of collection and stream oriented languages...

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