RE: fftw on cygwin

[Paul Billings]

I believe a generic version of FFTW would suffice.  In contrast to ATLAS
which does extensive benchmarking at make/compile time, FFTW does run-time
measurements (or can load previously saved measurements or "wisdom").
Whatever instruction set that cygwin is generally targeting should be fine,
although I suppose you could have two versions: one for "barebones" and one
for SSE/SSE2 or whatever is appropriate (I forget the differences).  The
user would simply check one or the other in the cygwin setup application.

Paul

> -----Original Message-----
> From: James R. Phillips [mailto:address@hidden
> Sent: Tuesday, August 09, 2005 6:21 PM
> To: address@hidden
> Subject: RE: fftw on cygwin
>
>
> --- "Billings, Paul"
>
> > FFTW bundled would be a huge improvement for the casual user or more
> > importantly, the guy that is evaluating if he can abandon the Matlab
> > "maintenance" fees.
>
> Is it possible to compile a generic version that would work on any ia32
> processor?  Or will it by necessity use processor instruction set
> extensions in
> it's optimization process?
>
> > Packaging ATLAS as well would be fantastic.  I've seen some of the list
> > traffic about the difficulties in doing this.  Sure would be nice if it
> > could work, but I don't think it likely.
> >
>
> The Debian approach to packaging Atlas looked promising, but
> turned out to be
> too difficult to mimic. I include an option to build Atlas from
> source in the
> cygwin lapack package.
>
> JRP