SIMD vs no SIMD on i686

Sérgio Basto sergio at serjux.com
Fri Jul 22 23:09:38 CEST 2016


On Qua, 2016-07-20 at 11:46 +0200, Ralf Corsepius wrote:
> On 07/19/2016 02:26 PM, Nicolas Chauvet wrote:
> 
> > 
> > > 
> > > As I state before, I think, even in this case, x264 asm code,
> > > have a
> > > fall back when don't have sse2 instructions and don't crash, that
> > > is my
> > > point, but just testing to be sure. I don't see any hardware here
> > > to
> > > test it, even though it is a big challenge try install Fedora 24
> > > in
> > > a non-sse2 capable cpu .
> Well, it's not easy to install F24, but it's doable.
> 
> > 
> > You could setup a x86 32bit virtual machine using KVM install
> > fedora,
> > then mask cpu, or use pentium 3 as a CPU for the guest vm and
> > reboot.
> I do have a PIII (w/o sse3) running F24.

So can you test ? , if copy (overwrite) /usr/lib/sse2/libx264.so into
/usr/lib/libx264.so breaks x264 reading a movie or webcam, TBH don't
know how to test it.

But just do as root, cp /usr/lib/sse2/libx264.so /usr/lib/libx264.so 
and find out if video x264 still working or crash ? 

Many thanks,

> Ralf
-- 
Sérgio M. B.


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