[MPlayer-dev-eng] [PATCH]: af_resample SIMD optimization(MMX/SSE2/3DNOW!/SSE/SSE3)

[Reimar Döffinger]

On Thu, Mar 12, 2009 at 06:22:48PM +0800, Zuxy Meng wrote:
> 2009/3/12 Andrew Savchenko <bircoph at gmail.com>:
> > On Thursday 12 March 2009 10:09, Zhou Zongyi wrote:
> >> I tested them on Athlon XP. SSE3 seems a bit faster than SSE.
> >> Perhaps lddqu is faster than movups?
> >
> > Huh? Athlon XP doesn't support neither SSE3, nor SSE2, only SSE.
> >
> > # x86info
> > [...]
> > Family: 6 Model: 10 Stepping: 0
> > CPU Model : Athlon XP (Barton)
> > Feature flags:
> >  fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> > pse36 mmx fxsr sse
> > Extended feature flags:
> >  fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> > pse36 mmxext mmx fxsr 3dnowext 3dnow
> >
> > And the following code fails with SIGILL on my Athlon XP:
> > int main(void) {
> >    __asm__ __volatile__ ("addsubpd %%xmm0, %%xmm1":::"memory");
> >    return 0;
> > }
> >
> > lddqu also fails with SIGILL.
> > Am I missing something?
> 
> I bet he meant K8/Athlon 64.

K8 in my mind is the original Athlon 64, it certainly did not have SSE3,
nor do the older Athlon 64 X2 models.