[Ffmpeg-devel] SSE2 Crashing
Fri Aug 18 23:12:41 CEST 2006
Loren Merritt wrote:
> DECLARE_ALIGNED_8 is supposed to be __attribute__ ((aligned (8))).
> The fix is to use DECLARE_ALIGNED_16 if it needs to be aligned 16. Hence
> the name.
Despite its name, DECLARE_ALIGNED_8 means aligned(4) in one and
aligned(16) in another case already. The next thing is, that the choice
between 8 and 16 byte alignments is done in the libavcodec/*.c routines
which most on them only pretend to know what alignment the target needs.
(like that dv.c selects 8 byte aligments, which didn't work here,
because dv.c has no idea that it calls SSE Routines which expect 16 byte
So what is the reason that there isn't simply one DECLARE_ALIGNED macro
which produces the maximum required alignment for the target-specific
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