[FFmpeg-devel] [PATCH] SPARC VIS simple_idct try#6
Tue Aug 28 22:31:20 CEST 2007
Tuesday 28 August 2007 21:33-kor Michael Niedermayer ezt ?rta:
> > Are you saying, that if I add/put_clamped the result in the second half
> > of the transform directly, instead of just storing it for a later
> > add/put_clamped operation, than you would accept my patch? If your answer
> > is yes, than it is feasible, and I think I will do that.
> you are forgetting that theres also 25% between the horizontal and vertical
> idcts which can be reused with no store/load and no changes to the
Indeed, I didn't take that into account. So if I fix that 25% and the clamping
part, will you accept the patch?
> how common is the US T2 ? if its a rare and old CPU i dont see a reason to
> care about it ...
It's the new CPU from Sun with (up to?) 8 cores. It is aimed at servers, not
at multimedia playback - but as a matter of fact nothing of the whole SPARC
line is aimed at multimedia playback.
[...snipped interesting part about a theoretical problem, that noone will ever
solve in practice because it's too complicated and ugly - but you are right
the additional 8 instructions are not needed]
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