[Ffmpeg-devel] [PATCH] (somewhat) optimized C aes 128 bit
Sun Jan 14 19:50:40 CET 2007
On Sun, Jan 14, 2007 at 03:24:46PM +0100, Reimar D?ffinger wrote:
> On Sun, Jan 14, 2007 at 02:57:46PM +0100, Michael Niedermayer wrote:
> > > Main bottleneck seems to be SUBSTSHIFTROWS, for which I have no idea how
> > > to optimize it further right now in C.
> > > SSE shuffle instruction could probably be very useful to optimize the
> > > shifting, but the invsubst table lookup still seems not nice - except
> > > maybe by using a 64k size table and thus always looking up two at once...
> > cant the substitution stuff be merged into the multbl? i think it should
> > be possible ...
> I currently don't see a way unless combining it also with the XORBLOCK
see svn :)
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
The educated differ from the uneducated as much as the living from the
dead. -- Aristotle
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