Re: need optimized 2d fft for G5

• Subject: Re: need optimized 2d fft for G5
• From: Bill Henry <email@hidden>
• Date: Sat, 3 Apr 2004 13:06:02 -0600

I did some checking on FFT support on the G5. We have accelerated
libraries that have tuned double-precision (Real, Complex, 1D, 2D etc),
FFTs in them. See the following on how to call the *fast* libraries:
See the "man" page at:
<http://developer.apple.com/documentation/Darwin/Reference/ManPages/
html/vMathLib.7.html>

Study the source code example at:
<http://developer.apple.com/hardware/ve/downloads/vDSP.sit.hqx>

Browse:
<http://developer.apple.com/documentation/ReleaseNotes/MacOSX/
vecLib.html>
<http://developer.apple.com/hardware/ve/vector_libraries.html>

*** For high performance image processing see: ***
<http://developer.apple.com/documentation/Performance/Conceptual/
vImage/>

On Apr 3, 2004, at 9:10 AM, George Duncan wrote:

I am new to this list. I am porting a code to the G5
and have a question about fft routines.  I have been
computing on intel boxes until now am am anxious to
see what my new G5 can do in comparison.  I have a
fortran90 code which simulates the motion of the human
vocal folds in phonation.  The code uses a
Navier-Stokes solver which assumes periodic bc and
uses fft very efficiently. I want to move to the G5
with the same code intact but with the intel MKL
library replaced with some _optimized_ library for the
G5 containiing, among other things, the fft routines
[I do complex to complex and the inverse and extract
the real part ].  I am hopeful that someone on this
list can point me to a highly optimized fft.  I am
aware of fftw, but have not tried it on the G5.  Does
anyone know of routines which have these properties
and are sharable.

Thanks much for your help.

Comer Duncan
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