[vlc-devel] commit: Add a CPU capability for ARM NEON ( Rémi Denis-Courmont )

Rémi Denis-Courmont remi at remlab.net
Sun Sep 6 20:35:23 CEST 2009

Le dimanche 6 septembre 2009 21:09:24 Måns Rullgård, vous avez écrit :
> git at videolan.org (git version control) writes:
> > vlc | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Sat Sep  5
> > 16:56:25 2009 +0300| [600d29043eed8f9c3e848dddb79bb0e2e9a0a391] |
> > committer: Rémi Denis-Courmont
> >
> > Add a CPU capability for ARM NEON
> >
> > Currently, detection is done at build time. Feel free to add run-time
> > detect if you know how.
> Runtime detection is not possible in any sensible way.  I've discussed
> various options with ARM, and we had some ideas for how to make life
> easier for apps that need to know.  Unfortunately, I haven't had time
> to do much yet.

It seemed to me more like a toolchain problem; I cannot configure gcc to 
accept inline NEON assembly, while otherwise generating plain ARM machine 
code. On PPC and x86, we simply check whether one instruction triggers SIGILL.

Rémi Denis-Courmont

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