Code transformation and instruction set extension

Alastair C. Murray, Richard V. Bennett, Björn Franke, Nigel Topham

Research output: Contribution to journalArticlepeer-review


The demand for flexible embedded solutions and short time-to-market has led to the development of extensible processors that allow for customization through user-defined instruction set extensions (ISEs). These are usually identified from plain C sources. In this article, we propose a combined exploration of code transformations and ISE identification. The resulting performance of such a combination has been measured on two benchmark suites. Our results demonstrate that combined code transformations and ISEs can yield average performance improvements of 49%. This outperforms ISEs when applied in isolation, and in extreme cases yields a speed-up of 2.85.
Original languageEnglish
Article number26
Number of pages31
JournalACM Transactions on Embedded Computing Systems
Issue number4
Publication statusPublished - 1 Jul 2009

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