[FFmpeg-devel] [PATCH] Fix bitexact SwScale on PPC

Michael Niedermayer michaelni
Sat Feb 14 16:14:34 CET 2009

On Sat, Feb 14, 2009 at 05:23:02PM +0200, Kostya wrote:
> This is needed to make regression test pass on PPC.

> First patch avoids calling AltiVec'ed functions that produce different results
> from C implementation (maybe just for the reference until someone fixes that
> stuff).


> The second patch changes hScale_altivec_real() to output filter results in the
> same manner as C code does (i.e. without negative values clipped). I suspect
> MMX version of hScale() with its "packssdw" does the same thing as C code too.

not maintained by me

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

If a bugfix only changes things apparently unrelated to the bug with no
further explanation, that is a good sign that the bugfix is wrong.
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