This isn't really worth a pull request, but double->float is 1&(3!:5) and float->double is _1&(3!:5)
This is documented at http://www.jsoftware.com/help/dictionary/dx003.htm. (Note that floats are represented as a sequence of literals, because J can't work with them.) $1&(3!:5) o.1 2 4 $1&(3!:5) o.1 2 8 a.i.1&(3!:5) o.1 219 15 73 64 Thanks, -- Raul On Sat, Aug 30, 2014 at 1:04 AM, Scott Locklin <[email protected]> wrote: > So, it took me all of 20 minutes to pull dgemm into J for a matrix > multiplication speedup. > I stuck it here, along with an org-emacs TODO list for making this actually > happen. > It's all "busy work" as far as I can tell, though it would be my first time > writing code that links to CUDA. > > Either way, the dgemm wrapper should eventually make its way into the API > stuff, as it's a pretty good speedup over +/ .* for bigger array problems > > https://github.com/locklin/jCUDA > > Feel free to pitch in on the busy work if anyone has problems that would > benefit from this. > > -Scott > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
