On 18/01/16 16:38, Diego Biurrun wrote: > From: Fiona Glaser <fi...@x264.com> > > --- > libavutil/x86/cpu.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/libavutil/x86/cpu.c b/libavutil/x86/cpu.c > index e7647dc..7cc9896 100644 > --- a/libavutil/x86/cpu.c > +++ b/libavutil/x86/cpu.c > @@ -221,6 +221,12 @@ int ff_get_cpu_flags_x86(void) > * functions on the Atom. */ > if (model == 28) > rval |= AV_CPU_FLAG_ATOM; > + > + /* Conroe has a slow shuffle unit. Check the model number to ensure > not > + * to include crippled low-end Penryns and Nehalems that lack SSE4. > */ > + if ((rval & AV_CPU_FLAG_SSSE3) && !(rval & AV_CPU_FLAG_SSE4) && > + model < 23) > + rval |= AV_CPU_FLAG_SSSE3SLOW; > } > > #endif /* cpuid */ >
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