[MPlayer-users] configure and Cyrix C3

[Guillaume POIRIER]

Hi,

On 11/11/05, Andre Majorel <aym-reyalpm at teaser.fr> wrote:
> On 2005-11-11 21:50 +0100, Guillaume POIRIER wrote:
> > On 11/11/05, Andre Majorel <aym-reyalpm at teaser.fr> wrote:
> > > As of today, MPlayer HEAD does not build out of the box on
> > > Cyrix/VIA C3 systems. It compiles, but the resulting binary
> > > crashes with an "Illegal instruction" error.
> > >
> > > configure (correctly) detects a 686 CPU and (incorrectly) passes
> > > GCC the -march=i686 option. gcc -march=i686 produces code which
> > > uses the CMOV instruction, which is missing on the C3. This is
> > > true for all versions of GCC, as far as I know. Checked with 3.3.5
> > > and 4.0.2.
> >
> > Could you please try the attached patch with gcc-3.3 and 4.0?
>
> With your patch, ./configure sets TARGET_CPU to 686 and puts
> -march=c3-2 and -mtune=c3-2 in OPTFLAGS. I suspect this is
> incorrect. From gcc(1) :
>
>   c3  Via C3 CPU with MMX and 3dNOW! instruction set support.  (No
>       scheduling is implemented for this chip.)
>
>   c3-2
>       Via C3-2 CPU with MMX and SSE instruction set support.  (No
>       scheduling is implemented for this chip.)
>
> >From /proc/cpuinfo :
>
>   flags           : fpu de tsc msr cx8 mtrr pge mmx 3dnow
>
> I'll report on the run-time behaviour when the compile is done.

Woops, I made a typo. New patch attached.

Guillaume

--
Reading doesn't hurt, really!
 -- Dominik 'Rathann' Mierzejewski
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