In message <[EMAIL PROTECTED]>
Camm Maguire <[EMAIL PROTECTED]> wrote:
> Greetings! Here is a piece of a post regarding difficulties compiling
> atlas on arm I recently submitted to the atlas mailing list. I'd
> appreciate any thoughts.
>
> > 4) (longer term) I've been unable to compile atlas on arm for years.
> > The rusage cpu timer is dysfunctional, and -DWALL gives
> > unrepeatable timings which can't be boiled down within tolerance.
> > The floating point performance by default is ridiculous when
> > compared to the speed of the cpu (possibly the real source of these
> > problems), and I can only surmise that in its minimal configuration
> > floating point is emulated.
Floating point is emulated on most ARM CPUs.
> > Later generations of the cpu with
> > vector floating point instructions and respectable performance
> > appear to exist as well. ARM chips underly (most?) Linux pda's.
Some of the XScale processors support vector floating point, yes - but I
don't think there's any support for this in ARM Linux, and in any case,
most of the XScale variants in use, including in PDAs, don't have this.
--
Peter Naulls - [EMAIL PROTECTED] | http://www.chocky.org/
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