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  1. 07 Nov, 2016 1 commit
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  7. 26 Oct, 2016 3 commits
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  11. 24 Oct, 2016 1 commit
    • Frank Barchard's avatar
      Add MSA optimized I422ToARGBRow_MSA and I422ToRGBARow_MSA functions · f5d5bd88
      Frank Barchard authored 
      R=fbarchard@google.com
BUG=libyuv:634

Performance Gains :- (vs C vectorized)

I422ToARGBRow_MSA     : ~1.6x
I422ToRGBARow_MSA     : ~1.6x

I422ToARGBRow_Any_MSA : ~1.58x
I422ToRGBARow_Any_MSA : ~1.6x

Performance Gains :- (vs C non-vectorized)

I422ToARGBRow_MSA     : ~7x
I422ToRGBARow_MSA     : ~7x

I422ToARGBRow_Any_MSA : ~6.9x
I422ToRGBARow_Any_MSA : ~6.8x

Regarding performance measurement, We have created standalone tests which pass in row's data from a 1920x1080 filled buffer to both the C and MSA functions. And such N iterations are executed to get more accurate timings of C vs MSA.

Review URL: https://codereview.chromium.org/2430313005 .
      f5d5bd88
  13. 21 Oct, 2016 1 commit
    • Frank Barchard's avatar
      scale by 1 for neon implemented · 451af5e9
      Frank Barchard authored 
      void HalfFloat1Row_NEON(const uint16* src, uint16* dst, float, int width) {
  asm volatile (
  "1:                                          \n"
    MEMACCESS(0)
    "ld1        {v1.16b}, [%0], #16            \n"  // load 8 shorts
    "subs       %w2, %w2, #8                   \n"  // 8 pixels per loop
    "uxtl       v2.4s, v1.4h                   \n"  // 8 int's
    "uxtl2      v1.4s, v1.8h                   \n"
    "scvtf      v2.4s, v2.4s                   \n"  // 8 floats
    "scvtf      v1.4s, v1.4s                   \n"
    "fcvtn      v4.4h, v2.4s                   \n"  // 8 floatsgit
    "fcvtn2     v4.8h, v1.4s                   \n"
   MEMACCESS(1)
    "st1        {v4.16b}, [%1], #16            \n"  // store 8 shorts
    "b.gt       1b                             \n"
  : "+r"(src),    // %0
    "+r"(dst),    // %1
    "+r"(width)   // %2
  :
  : "cc", "memory", "v1", "v2", "v4"
  );
}

void HalfFloatRow_NEON(const uint16* src, uint16* dst, float scale, int width) {
  asm volatile (
  "1:                                          \n"
    MEMACCESS(0)
    "ld1        {v1.16b}, [%0], #16            \n"  // load 8 shorts
    "subs       %w2, %w2, #8                   \n"  // 8 pixels per loop
    "uxtl       v2.4s, v1.4h                   \n"  // 8 int's
    "uxtl2      v1.4s, v1.8h                   \n"
    "scvtf      v2.4s, v2.4s                   \n"  // 8 floats
    "scvtf      v1.4s, v1.4s                   \n"
    "fmul       v2.4s, v2.4s, %3.s[0]          \n"  // adjust exponent
    "fmul       v1.4s, v1.4s, %3.s[0]          \n"
    "uqshrn     v4.4h, v2.4s, #13              \n"  // isolate halffloat
    "uqshrn2    v4.8h, v1.4s, #13              \n"
   MEMACCESS(1)
    "st1        {v4.16b}, [%1], #16            \n"  // store 8 shorts
    "b.gt       1b                             \n"
  : "+r"(src),    // %0
    "+r"(dst),    // %1
    "+r"(width)   // %2
  : "w"(scale * 1.9259299444e-34f)    // %3
  : "cc", "memory", "v1", "v2", "v4"
  );
}

TEST=LibYUVPlanarTest.TestHalfFloatPlane_One
BUG=libyuv:560
R=hubbe@chromium.org

Review URL: https://codereview.chromium.org/2430313008 .
      451af5e9
  15. 20 Oct, 2016 2 commits
  17. 19 Oct, 2016 1 commit
  19. 18 Oct, 2016 3 commits
  21. 17 Oct, 2016 3 commits
  23. 15 Oct, 2016 1 commit
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  31. 11 Oct, 2016 2 commits
  33. 08 Oct, 2016 2 commits
  35. 07 Oct, 2016 1 commit
  37. 06 Oct, 2016 1 commit
    • Frank Barchard's avatar
      YUY2ToI422_Any_Neon clean up to not require 16 pixels · 3b88a19a
      Frank Barchard authored 
      YUY2ToI422_Any_Neon previously required 16 pixels and duplicated
the last pixel.  The replication was not necessary after a previous
change to treat YUY2 to 4 byte macro pixels.

TBR=harryjin@google.com
BUG=libyuv:648
TESTED=util/android/test_runner.py gtest -s libyuv_unittest -t 7200 --verbose --release --gtest_filter=*YUY2ToI422* -a "--libyuv_width=17 --libyuv_height=7 --libyuv_repeat=999 --libyuv_flags=1"

Review URL: https://codereview.chromium.org/2399143002 .
      3b88a19a
  39. 05 Oct, 2016 1 commit
  41. 04 Oct, 2016 2 commits
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  45. 30 Sep, 2016 1 commit
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  49. 28 Sep, 2016 1 commit