Boost logo

Boost :

Subject: Re: [boost] SIMD implementation of uBLAS
From: Aditya Atluri (adityaavinash143_at_[hidden])
Date: 2013-05-29 07:36:27


On Wed May 29 2013 04:35:05 PM IST, Mathias Gaunard <mathias.gaunard_at_[hidden]> wrote:
> On 29/05/13 12:46, Aditya Avinash wrote:
> > On Wed, May 29, 2013 at 4:10 PM, Mathias Gaunard <
> > mathias.gaunard_at_[hidden]> wrote:
> > >
> > >
> > > Ok, in that case, you need to first study how uBlas works.
> > >
> > > For example if you write something along the lines of
> > >
> > > a = trans(b + c) * d;
> > >
> > > AFAIK what uBlas does is something like
> > >
> > > for(size_t i=0; i!=sz.height; ++i)
> > > for(size_t j=0; j!=sz.width; ++j)
> > > a[i][j] = (b[j][i] + c[j][i]) * d[i][j];
> > >
> > > What you need to do is change the loop structure and modify the
> > > evaluation of all nodes involved to support SIMD.
> > >
> > > Of course trans is going to be a problem.
> > > Thankfully uBlas doesn't have that many functions, so trans and herm
> > > are the only functions that exhibit that issue.
> >
> >
> > Should i write SIMD code for the algorithm. Or, as there is no such
> > function in uBLAS, do you want me to develop CPU code (function)??
>
> There is no algorithm here. It's just the evaluation of a uBlas matrix
> expression template.
>
> _______________________________________________
> Unsubscribe & other changes:
> http://lists.boost.org/mailman/listinfo.cgi/boost

Ok. Shall i start writing SIMD code for it?


Boost list run by bdawes at acm.org, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk