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  1. 08 Jun, 2016 2 commits
    • Frank Barchard's avatar
      document cpuid command line behavior · e2611a73
      Frank Barchard authored 
      cpu_info_ is zero for uninitialized state and all bits are off, disabling all cpu optimizations.
the 1 bit indicates cpu_info_ is initialized avoiding calling the detection code again for performance.

MaskCpuFlags initializes the cpu ignoring existing flags, then masks with the supplied flags and stores to cpu_info_.
As a mask, -1 has no effect, enabling all cpu features that were detected, but nothing that wasnt detected.
Setting to 0 will cause the next call to re-initialize the cpu, which is same as enabling all features.
Setting mask to 1 will turn off all cpu features but keep the initialized bit on, so the next detection call wont reinitialize and the cpu features are all disabled.

So normal behavior for command line and programatic masking is:
1 = C
-1 = SIMD

TBR=harryjin@google.com
BUG=libyuv:600
TESTED=out64/Release/bin/run_libyuv_unittest -s libyuv_unittest --verbose --release --gtest_filter=*ARGBExtractAlpha* -a "--libyuv_width=1280 --libyuv_height=720 --libyuv_repeat=9999 --libyuv_flags=1 --libyuv_cpu_info=1"

Review URL: https://codereview.chromium.org/2042933002 .
      e2611a73
    • Frank Barchard's avatar
      neon64 use width int directly. · 026be3cd
      Frank Barchard authored 
      width %w size modifier the int width can be passed directly to arm assembly.
For functions that take input constants, the outputs are declared as early
write using &, meaning the outputs use used before all inputs are consumed.

R=harryjin@google.com
BUG=libyuv:598

Review URL: https://codereview.chromium.org/2043073003 .
      026be3cd
  3. 07 Jun, 2016 2 commits
    • Frank Barchard's avatar
      Remove ifdefs for neon in row_neon*.cc · 17e8a4d3
      Frank Barchard authored 
      ifdefs on a function level are not needed for neon functions, unless
they are conditionally enabled in row.h.  No functions are conditionally
enabled at this time, so all ifdefs can be removed from row_neon.cc and
row_neon64.cc

TBR=kjellander@chromium.org
BUG=libyuv:599

Review URL: https://codereview.chromium.org/2044223002 .
      17e8a4d3
    • Frank Barchard's avatar
      ARGBExtractAlpha 16 pixels at a time for ARM · 65460962
      Frank Barchard authored 
      arm64   8     TestARGBExtractAlpha (10019 ms) <-original 64 bit code
arm64   8 x2  TestARGBExtractAlpha (7639 ms)
arm64   16    TestARGBExtractAlpha (7369 ms) <- new 64 bit code
thumb32 8     TestARGBExtractAlpha (9505 ms) <- original 32 bit code
thumb32 8 x2  TestARGBExtractAlpha (7400 ms)
thumb32 8 x2i TestARGBExtractAlpha (7266 ms) <- new 32 bit code
arm32   8     TestARGBExtractAlpha (10002 ms)

BUG=libyuv:572
TESTED=local test on nexus 9
R=harryjin@google.com, wangcheng@google.com

Review URL: https://codereview.chromium.org/2035573002 .
      65460962
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