Ian Henriksen schrieb am 12.08.2014 um 04:34: > On Sun, Aug 10, 2014 at 12:41 PM, Sturla Molden wrote: >> Ian Henriksen wrote: >>> Maybe I should clarify a little about why eigen is a good place to start. >>> According to <a >>> href="http://eigen.tuxfamily.org/dox/TopicLazyEvaluation.html";> >> http://eigen.tuxfamily.org/dox/TopicLazyEvaluation.html</a> >>> it >>> already takes care of things like the elimination of temporary variables >>> and common subexpression reduction at compile time. This should make it >>> possible to compile array expressions in Cython without having to >>> re-implement those sorts of optimizations. Ideally we would just have to >>> map memory view operations to corresponding equivalents from eigen. It's >>> not yet clear to me how to do things with arbitrary-dimensional arrays or >>> broadcasting, but, given some more time, a solution may present itself. >>> -Ian >> >> cilkplus is what you want, not Eigen. >> >> But if you are serious about number crunching, learn Fortran 95. > > Cilk Plus would also work really nicely for this. Thanks for the suggestion. > Fortran is a really great language for this sort of thing, but I don't > think I'm ready to tackle the difficulties of using it as a backend for > array arithmetic in Cython. It would be a really great feature to have > later on though.
That clarifies a bit of the design then: The syntax support should be somewhat generic, with specialised (sets of) node implementations as backends that generate code for different libraries/compilers/languages. It's ok to start only with Eigen, though. We have working example code for it and everything else has either a much higher entry level for the implementation or a much lower general availability of the required tools. For the syntax/type support, a look at the array expressions branch might also be helpful, although I doubt that there really is all that much to do on that front. Stefan _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
