Ups: Created page with "'''Data-Layout Inference for Generating Vectorised Code''' by Sven-Bodo Scholz SIMD instructions of modern CPUs are crucially important for the performance of compute-intensive ..."

2013-03-08T21:22:16Z

Created page with "'''Data-Layout Inference for Generating Vectorised Code''' by Sven-Bodo Scholz SIMD instructions of modern CPUs are crucially important for the performance of compute-intensive ..."

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'''Data-Layout Inference for Generating Vectorised Code''' by Sven-Bodo Scholz

SIMD instructions of modern CPUs are crucially important for the
performance of compute-intensive programs. Often, auto-vectorisation leads
to sub-optimal results due to the data-layout chosen by the application
programmer. The reasons for choosing an unfavourable layout can be
manifold: software engineering principles may contradict performance
demands, the layout demands may depend on the target architecture a program
was first run on, etc. However, most of the time it is simply a lack of
awareness of the programmer.

In this talk, we present an approach towards liberating the programmer from
the burden of considering the suitability of his data structures for
vectorisation. We present an inference scheme that allows compilers to
identify suitable data-layouts and a refactoring scheme to modify the code
accordingly. We demonstrate our ideas by means of a running example and
present some very encouraging initial performance results of our technique.

WG211/M12Scholz - Revision history

Ups: Created page with "'''Data-Layout Inference for Generating Vectorised Code''' by Sven-Bodo Scholz SIMD instructions of modern CPUs are crucially important for the performance of compute-intensive ..."