Parallelization via Context Preservatio

  • Authors:
  • Wei-Ngan Chin;Akihiko Takano;Zhenjiang Hu

  • Affiliations:
  • -;-;-

  • Venue:
  • ICCL '98 Proceedings of the 1998 International Conference on Computer Languages
  • Year:
  • 1998

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Abstract

Program schemes, such as scan or homomorphism, can capture a wide range of data parallel programs. While versatile, these schemes are of limited practical use on their own. A key problem is that the more natural sequential specifications may not have associative combine operators required by these schemes. As a result, they often fail to be immediately identified. To resolve this problem, we propose a method to systematically derive parallel programs from sequential definitions. This method is special in that it can automatically invent auxiliary functions needed by associative combine operators. Apart from a formalisation, we also provide new theorems, based on the notion of context preservation, to guarantee parallelization for a precise class of sequential programs.