Re: [Cython] aritmetic with arrays in Cython
On Monday 04 of August 2014 13:11:13 Ian Henriksen wrote: > Hi all, > I noticed that some time ago there was a pull request ( > https://github.com/cython/cython/pull/144) open that was trying to > implement basic arithmetic operations with arrays. This seems to have also > been proposed in CEP 518 ( > https://github.com/cython/cython/wiki/enhancements-simd). What is the > status on this? > > This is a feature I'd really like to see in Cython. I'd be happy to help > with it, though I don't currently know enough about the internals of Cython > to do it without some guidance. What would be the best way to do this? I've > had three ideas thus far that might allow something like this to work, but > I'd really like to get some second opinions before I get too far with any > of them. Hi, you may also check out https://github.com/strohel/Ceygen if it would suit your needs. Cheers, Matěj ___ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
Re: [Cython] aritmetic with arrays in Cython
Nice module! That seems to implement most of the basic functionality I've seen lacking. Ideally, I'm still trying to find a way to be able to do something syntactically like this: cpdef whateverfunction(double[:] a, float[:] b): return a + a * b + .5 It would be ideal if that sort of thing were already a part of Cython. All things considered though, most of what I'm looking for seems to be there. Thanks! -Ian Henriksen On Thu, Aug 7, 2014 at 1:58 AM, Matěj Laitl wrote: > On Monday 04 of August 2014 13:11:13 Ian Henriksen wrote: > > Hi all, > > I noticed that some time ago there was a pull request ( > > https://github.com/cython/cython/pull/144) open that was trying to > > implement basic arithmetic operations with arrays. This seems to have > also > > been proposed in CEP 518 ( > > https://github.com/cython/cython/wiki/enhancements-simd). What is the > > status on this? > > > > This is a feature I'd really like to see in Cython. I'd be happy to help > > with it, though I don't currently know enough about the internals of > Cython > > to do it without some guidance. What would be the best way to do this? > I've > > had three ideas thus far that might allow something like this to work, > but > > I'd really like to get some second opinions before I get too far with any > > of them. > > Hi, > you may also check out https://github.com/strohel/Ceygen if it would suit > your > needs. > > Cheers, > Matěj > ___ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
Re: [Cython] aritmetic with arrays in Cython
Ian Henriksen schrieb am 08.08.2014 um 00:58: > On Thu, Aug 7, 2014 at 1:58 AM, Matěj Laitl wrote: >> you may also check out https://github.com/strohel/Ceygen if it would suit >> your needs. Interesting project. Thanks for sharing. > Ideally, I'm still trying to find a way to be able to do > something syntactically like this: > > cpdef whateverfunction(double[:] a, float[:] b): > return a + a * b + .5 > > It would be ideal if that sort of thing were already a part of Cython. All > things considered though, most of what I'm looking for seems to be there. Eigen can apparently do these things already: http://eigen.tuxfamily.org/dox/TopicLazyEvaluation.html It might not be all that much work to integrate this with Cython to enable syntax support. Or have some kind of preprocessor, but I guess that's not going to be simpler than have it in Cython as an optional AST transform. Basically, whenever an arithmetic expression consists of a mixture of memory views and (optionally) scalars, it could be mapped to the kind of code that Ceygen uses, just at an arbitrarily complex expression length. Specifically, this could be bound to the Matrix multiplication operator (which Cython now supports anyway) and limited to C++ compilation mode (which Eigen requires). http://legacy.python.org/dev/peps/pep-0465/ Stefan ___ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
