Commit Graph

7 Commits

Author SHA1 Message Date
Måns Rullgård
e6956a6e48 ARM: first value loaded in AV_RN64 needs to be early-clobber
Originally committed as revision 19656 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-08-16 15:51:50 +00:00
Måns Rullgård
300ad6c16e ARM: use gcc inline asm in bswap.h only when available
Originally committed as revision 19311 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-07-01 00:55:15 +00:00
Måns Rullgård
3c55ce039d ARM asm for AV_RN*()
ARMv6 and later support unaligned loads and stores for single
word/halfword but not double/multiple.  GCC is ignorant of this and
will always use bytewise accesses for unaligned data.  Casting to an
int32_t pointer is dangerous since a load/store double or multiple
instruction might be used (this happens with some code in FFmpeg).
Implementing the AV_[RW]* macros with inline asm using only supported
instructions gives fast and safe unaligned accesses.  ARM RVCT does
the right thing with generic code.

This gives an overall speedup of up to 10%.

Originally committed as revision 18601 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-04-18 00:00:28 +00:00
Måns Rullgård
60c703ac4b ARM: START/STOP_TIMER support for ARMv7
Originally committed as revision 18305 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-04-01 22:56:26 +00:00
Måns Rullgård
1e65f62e2b ARM: armcc versions of bswap_16/32
Originally committed as revision 17830 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-03-05 21:20:10 +00:00
Aurelien Jacobs
b250f9c66d Change semantic of CONFIG_*, HAVE_* and ARCH_*.
They are now always defined to either 0 or 1.

Originally committed as revision 16590 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-01-13 23:44:16 +00:00
Måns Rullgård
3a90480ac4 split bswap.h into per-arch files
Originally committed as revision 15663 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-10-21 22:29:57 +00:00