[MPlayer-users] configure and Cyrix C3

[Andre Majorel]

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.

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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