Hi, On Mon, Jul 23, 2012 at 5:37 PM, Daniel Kang <[email protected]> wrote: > On Mon, Jul 23, 2012 at 5:21 PM, Diego Biurrun <[email protected]> wrote: >> >> On Mon, Jul 23, 2012 at 05:12:23PM -0700, Daniel Kang wrote: >> > From: Daniel Kang <[email protected]> >> > >> > The only CPUs that have 3dnow and don't have mmxext are 12 years old. >> > --- >> > libavcodec/x86/dsputil_mmx.c | 9 --------- >> > libavcodec/x86/h264_qpel_mmx.c | 4 ---- >> > 2 files changed, 0 insertions(+), 13 deletions(-) >> >> What sort of maintenance burden does this relieve us from? >> I'm writing this mail on a system fitting the description >> you mention, my trusty old K6-III. > > [..] > 4. You can probably decode 260p H.264 with a K6-III. Who seriously would use > this?
This really is the killer. Is there any sort of reasonable expectation that a k6-3 can get useful work done when it comes to H264 decoding? I wouldn't even mind dropping all MMX optimizations (where MMX2 - i.e. SSE - or higher exists) altogether, i.e. going the H264 way and requiring SSE for "useful" x86 performance (i.e. non-C-only). Ronald _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
