Am 20.06.2013 13:58, schrieb bearophile: > > The Reddit thread contains a link to this page, a compiler for a C > variant from Intel that's optimized for SIMD: > http://ispc.github.io/ >
Since you mention that, I developed a similar compiler/language in parallel to Intel at the time. The main differences were an implicit approach to handling the main loop, it didn't expose the SIMD target through explicit indices like ISPC did at the beginning, and could target GPUs in addition to outputting SIMD code. It was primarily used for high performance image processing on a commercial application that needed a safe CPU fallback path. Although I didn't have the time to implement many comprehensive optimization techniques (apart from some basic ones and from what LLVM provides) the results were quite impressive, depending of course on how well a program lends itself to the SPMD->SIMD transformation. There are some benchmarks at the end of the thesis: http://outerproduct.org/research/msc-thesis-slurp.pdf Unfortunately, at this point it is purely academical because the copyright to the source code has been left with my former employer and now Google. It's a bit of a pity as it was filling a certain niche that nobody else did (fortunately this has become less of an issue with the ubiquitous distribution of shader capable GPUs and improving drivers from a certain GPU vendor).
