Skip to content
Snippets Groups Projects
Select Git revision
  • master default
  • n3.5-dev-tethys
  • n4.0.2-tethys
  • n3.2.12
  • n3.4.4
  • n4.0.2
  • n3.3.8
  • n2.8.15
  • n3.2.11
  • n3.4.3
  • n4.0.1
  • n4.1-dev
  • n4.0
  • n3.3.7
  • n3.0.11
  • n2.8.14
  • n3.4.2
  • n3.2.10
  • n3.3.6
  • n2.4.14
  • n3.4.1
  • n3.0.10
  • n3.2.9
23 results
Search by author
  • Any Author
  • Auri Auri aurieh
1 author
  1. Oct 25, 2015
  3. Oct 22, 2015
    • Ganesh Ajjanagadde's avatar
      avfilter,swresample,swscale: use fabs, fabsf instead of FFABS · 8507b98c
      Ganesh Ajjanagadde authored 
      It is well known that fabs and fabsf are at least as fast and sometimes
faster than the FFABS macro, at least on the gcc+glibc combination.
For instance, see the reference:
http://patchwork.sourceware.org/patch/6735/

.
This was a patch to glibc in order to remove their usages of a macro.

The reason essentially boils down to fabs using the __builtin_fabs of
the compiler, while FFABS needs to infer to not use a branch and to
simply change the sign bit. Usually the inference works, but sometimes
it does not. This may be easily checked by looking at the asm.

This also has the added benefit of reducing macro usage, which has
problems with side-effects.

Note that avcodec is not handled here, as it is huge and
most things there are integer arithmetic anyway.

Tested with FATE.

Reviewed-by: default avatarClément Bœsch <u@pkh.me>
Signed-off-by: default avatarGanesh Ajjanagadde <gajjanagadde@gmail.com>
      8507b98c
  5. Aug 30, 2015
  7. Apr 12, 2015
  9. Feb 16, 2015
  11. Aug 09, 2014
  13. Jun 03, 2014
  15. Feb 04, 2013
  17. Nov 13, 2012
  19. Oct 16, 2012
  21. Oct 06, 2012
  23. Sep 06, 2012
  25. Jun 05, 2012
  27. May 05, 2012
  29. May 03, 2012
  31. May 01, 2012
  33. Apr 27, 2012
  35. Apr 26, 2012
  37. Apr 10, 2012
  39. Apr 01, 2012