[x264-devel] x86: detect Bobcat, improve Atom optimizations, reorganize flags

[Jason Garrett-Glaser]

x264 | branch: master | Jason Garrett-Glaser <jason at x264.com> | Sat Feb  2 12:37:08 2013 -0800| [4f24bb34453fdedefd161063e20516d148b80f8b] | committer: Jason Garrett-Glaser

x86: detect Bobcat, improve Atom optimizations, reorganize flags

The Bobcat has a 64-bit SIMD unit reminiscent of the Athlon 64; detect this
and apply the appropriate flags.

It also has an extremely slow palignr instruction; create a flag for this to
avoid massive penalties on palignr-heavy functions.

Improve Atom function selection and document exactly what the SLOW_ATOM flag
covers.

Add Atom-optimized SATD/SA8D/hadamard_ac functions: simply combine the ssse3
optimizations with the sse2 algorithm to avoid pmaddubsw, which is slow on
Atom along with other SIMD multiplies.

Drop TBM detection; it'll probably never be useful for x264.

Invert FastShuffle to SlowShuffle; it only ever applied to one CPU (Conroe).

Detect CMOV, to fail more gracefully when run on a chip with MMX2 but no CMOV.

> http://git.videolan.org/gitweb.cgi/x264.git/?a=commit;h=4f24bb34453fdedefd161063e20516d148b80f8b
---

 common/common.c        |    4 +-
 common/cpu.c           |  107 +++++++++++++++++++++----------------
 common/dct.c           |   42 +++++++++------
 common/frame.c         |    6 ++-
 common/pixel.c         |   31 ++++++++---
 common/x86/mc-c.c      |  115 ++++++++++++++++++++++------------------
 common/x86/pixel-a.asm |  138 ++++++++++++++++++++++++++----------------------
 common/x86/pixel.h     |   14 +++--
 common/x86/predict-c.c |   10 ++--
 encoder/encoder.c      |   37 +++++++++----
 tools/checkasm.c       |   38 +++++++------
 x264.h                 |   84 ++++++++++++++++-------------
 12 files changed, 367 insertions(+), 259 deletions(-)

Diff:   http://git.videolan.org/gitweb.cgi/x264.git/?a=commitdiff;h=4f24bb34453fdedefd161063e20516d148b80f8b