[FFmpeg-devel] basic DCT question

[Roman V. Shaposhnik]

On Mon, 2009-02-23 at 18:27 +0100, Diego Biurrun wrote:
> On Mon, Feb 23, 2009 at 09:23:46AM -0800, Roman V. Shaposhnik wrote:
> > 
> > Now I realize that these 3 bits differ between the implementations
> > and platforms and they seem to be the culprit of DV's regression
> > test miscompare on PPC.
> 
> Note that the regression tests now pass on PPC.  Sorry that we had you
> chasing ghosts there...

Well, that particular instance might have been a ghost, but it can
happen again. 

I believe my question is still a legit one. Now that I understand
the issue, I really have to understand the policy around the extra
precision we get from our DCT routines.

Thanks,
Roman.