Nepal -- Nested Data-Parallelism in Haskell

Manuel M. T. Chakravarty, Gabriele Keller, Roman Lechtchinsky, and Wolf Pfannenstiel.

In Rizos Sakellariou, John Keane, John R. Gurd, and Len Freeman, editors, Euro-Par 2001: Parallel Processing, 7th International Euro-Par Conference, Springer-Verlag, LNCS 2150, pp524-534, 2001.

Abstract
This paper discusses an extension of Haskell by support for nested data-parallel programming in the style of the special-purpose language Nesl. More precisely, the extension consists of a parallel array type, array comprehensions, and a set of primitive parallel array operations. This extension brings a hitherto unsupported style of parallel programming to Haskell. Moreover, nested data parallelism should receive wider attention when available in a standardised language like Haskell. This paper outlines the language extension and demonstrates its usefulness with two case studies.

PostScript version (10 pages).

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