MMX/SIMD ASM DSP Routines Re: [music-dsp] RE: On another topic... please

[John Utz]

This seemed like an appropriate thread to hijack with this new discovery 
:-)

http://people.qualcomm.com/karn/code/fec/

phil karn appears to have written some generally useful stuff that is 
probably quite useful to some folks on this list.

i know we where talking about roughly this subject a week or two ago, so i 
thought that i'd toss it in.

it's probably a good starting place for learning how to write other useful 
MMX/SIMD optimized routines as well.

it would be sort of fun to #ifdef _X86_ these into octave or pdl or some
other GPL'd general pupose mathtool and see what you get...


On Fri, 26 Apr 2002, Chun-Yu wrote:

> I don't have the Intel compiler, but I have the VC7 compiler.  The VC7
> compiler is a bit faster than the VC6 compiler.  I've gotten a version of
> LAME that was compiled by the Intel compiler, and it is considerably
> faster than either VC7 or VC6.  Here are the speeds I get on my P-III 866:
> Intel Compiler 4.5 (I didn't compile it, so I'm not sure what options were
> used) - 6x encoding
> VC7 (Whole program optimization on) - 5.2x
> VC6 (Maximize speed on) - 5x
> 
> So, for LAME, the Intel compiler is definetely faster by a wide margin.
> This wasn't even the latest version of it, either, so the latest version
> may be even better at optimizing.  I'm probably going to buy the Intel
> compiler sometime soon because it seems to be much better than
> Microsoft's.  (Note - there is an educational discount that's available to
> students and people who work at universities - you can get it for $125
> instead of $500)
> 
> Chun-Yu
> 
> 
> dupswapdrop -- the music-dsp mailing list and website: subscription info,
> FAQ, source code archive, list archive, book reviews, dsp links
> http://shoko.calarts.edu/musicdsp/
> 

-- 

John L. Utz III
john at utzweb.net

Idiocy is the Impulse Function in the Convolution of Life


dupswapdrop -- the music-dsp mailing list and website: subscription info,
FAQ, source code archive, list archive, book reviews, dsp links
http://shoko.calarts.edu/musicdsp/