On Wed, Jan 22, 2020 at 04:25:40PM +0100, Andreas Rheinhardt wrote: > On Wed, Jan 22, 2020 at 4:23 PM Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > > > Am Mi., 22. Jan. 2020 um 16:21 Uhr schrieb Andreas Rheinhardt > > <andreas.rheinha...@gmail.com>: > > > > > > On Wed, Jan 22, 2020 at 4:06 PM Carl Eugen Hoyos <ceffm...@gmail.com> > > wrote: > > > > > > > Am Mi., 22. Jan. 2020 um 15:57 Uhr schrieb Andreas Rheinhardt > > > > <andreas.rheinha...@gmail.com>: > > > > > > > > > > when directly accessing a buffer via a pointer to uint8_t cast to a > > > > > pointer to uint64_t/uint32_t. This happened only if > > HAVE_FAST_UNALIGNED > > > > > was set, so it was ok, but UBSan nevertheless complained about > > unaligned > > > > > accesses. So simply use AV_RNxx to read the buffer; this also > > improves > > > > > readability. > > > > > > > > Is there a speed impact? > > > > > > > The assembly produced by both Clang as well as GCC was completely > > > unchanged (for non-UBSan builds). > > > > (on x86?) > > > > Yes: x86-64.
are any other architectures affected or is it the same for all major ones? thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Elect your leaders based on what they did after the last election, not based on what they say before an election.
signature.asc
Description: PGP signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
