Re: cortex / arm-hardfloat-linux-gnueabi (was Re: armelfp: new architecture name for an armel variant)
Loïc Minier a écrit :
> On Fri, Jul 16, 2010, Konstantinos Margaritis wrote:
>> softfp:
>
> I wonder what you built with softfp exactly? Did you rebuild
> libc6, libpng12-0 for instance? Not that I expect that most of the
> time is spent in libpng12-0, but still.
>
> As I understand it, we have these options:
> - keep Debian armel as is, add a new armhf hard-float port
> - keep Debian armel as is, and provide an archive of Debian armel+vfp
> rebuilt with softfp
> - keep Debian armel as is, and change a dozen of libs to provide a VFP
> version (softfp)
>
> One way to check how well softfp performs would be to run povray in
> Ubuntu versus in Debian; this will mix noise in the results, but I
> don't expect the minor sourceful differences to make the biggest
> impact, but rather the toolchain opts would. (You're speaking of a
> 3-folds increase.)
>
> archive dist toolchain defaults
> ------- ---- ------------------
> Debian armel sid, squeeze armv4t + soft
> freevec.org karmic armv6 + hardfp
> Ubuntu armel karmic armv6 + softfp
> Ubuntu armel jaunty armv5t + soft
> Ubuntu armel lucid armv7t2 + softfp
>
> Would be nice to know against which userspace you ran your povray
> "softfp".
>
> I think povray is a nice example of a random package where we wouldn't
> put the effort to create a vfp pass, and where there's no lib, so it
> might indeed be a good example of a hardfp candidate.
>
OTOH, I am not sure povray is the most use software on ARM...
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurelien@aurel32.net http://www.aurel32.net
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