[FFmpeg-devel] [PATCH] SSE RDFT

Michael Niedermayer michaelni
Mon Mar 15 13:09:55 CET 2010


On Mon, Mar 15, 2010 at 10:38:11AM +0100, Michael Niedermayer wrote:
> On Mon, Mar 15, 2010 at 12:31:12AM +0000, M?ns Rullg?rd wrote:
> > Michael Niedermayer <michaelni at gmx.at> writes:
[...]
> > 
> > > yasm vs. inline is for the most part bikeshed, but there are cases where one
> > > wants to keep parts of the code in C for maintainability or integrate the
> > > code into C code avoiding call overhead. For these cases inline is required
> > > And we dont always know ahead of time where call overhead will matter.
> > 
> > We were talking about code called through a function pointer here.
> 
> yes, so it falls in the category that can be done in inline or yasm
> technically, that is the choice is a matter of preference/bikeshed

btw, speaking of yasm, a not too long while ago i realized that configure
simply compiles without yasm optimizations if yasm isnt installed
i noticed it just because x264 doesnt and warns, we should do the same
this issue alone weighs heavier than any difference between inline and
yasm. Because loosing the optimizations without the user knowing is really
bad.

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

it is not once nor twice but times without number that the same ideas make
their appearance in the world. -- Aristotle
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