Re: cortex / arm-hardfloat-linux-gnueabi (was Re: armelfp: new architecture name for an armel variant)
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.
--
Loïc Minier
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