[FFmpeg-devel] C99 or GCC extensions

Michael Niedermayer michaelni
Sun Jul 20 19:37:57 CEST 2008

On Sun, Jul 20, 2008 at 02:17:26PM +0200, Axel Holzinger wrote:
> Axel Holzinger <aholzinger at gmx.de> writes:
> <...>
> > > Please also post some benchmarks that show that the uses of
> > > FASTDIV didnt become slower. (see START/STOP_TIMER)
> > 
> > Will do so, although I won't be able to do this for ARM V4, which is
> > also concerned.
> > 
> > Of course I checked the disassembly on Intel C compiler and I
> > couldn't see a difference in the code.
> Hi again, I looked at the START/STOP TIMER code and come up with the
> attached main.c file which implements loops of FASTDIVs with the
> existing and the proposed implementation together with the definition
> and table of FASTDIV, to keep everything in a single file.
> I hope I did get this right, otherwise the following output on my dual
> Core 2 Duo machine is obsolete:

START/STOP_TIMER should be surrounding an EXISTING use of FASTDIV in lavc and
then decode a file to /dev/null and look at the numbers.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

While the State exists there can be no freedom; when there is freedom there
will be no State. -- Vladimir Lenin
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