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2 Commits

Author SHA1 Message Date
Frank Barchard
378bc91324 [libyuv] Multi-platform ScaleUVAddCols3 for ScaleUVBox at 3x 
Based on Philipp Hancke's AVX2 column kernel for ScaleUVBox at 3x
(https://crrev.com/c/8427347).

Add ScaleUVAddCols3 for exact 3x horizontal downscaling (dx == 0x30000
and boxheight <= 85) in ScaleUVBox, plus ScaleAddRow_AVX512BW and
ScaleAddRow_WASMSIMD dispatch, and port 3x/box scaling kernels in
scale_win.cc to 32/64-bit C++ intrinsics matching scale_gcc.cc:
- ScaleUVAddCols3_C (portable C)
- ScaleUVAddCols3_AVX2 and ScaleUVAddCols3_Any_AVX2 (scale_gcc.cc and
  scale_win.cc)
- ScaleUVAddCols3_AVX512VBMI (scale_gcc.cc and scale_win.cc)
- ScaleAddRow_SSE2, ScaleAddRow_AVX2, ScaleAddRow_AVX512BW,
  ScaleAddCols1_AVX512BW, ScaleAddCols2_AVX512BW, ScaleRowDown38_SSSE3,
  ScaleRowDown38_2_Box_SSSE3, and ScaleRowDown38_3_Box_SSSE3 in
  scale_win.cc for 32/64-bit Visual C and LIBYUV_ENABLE_ROWWIN
- ScaleUVAddCols3_NEON (32-bit ARM and 64-bit AArch64) and
  ScaleUVAddCols3_Any_NEON
- ScaleUVAddCols3_SME (ARMv9 Streaming SVE with whilelt predicate tail)
- ScaleUVAddCols3_RVV (RISC-V Vector vlseg3e32.v inline asm)
- ScaleUVAddCols3_LSX and ScaleUVAddCols3_Any_LSX (LoongArch LSX)
- ScaleAddRow_WASMSIMD, ScaleAddRow_Any_WASMSIMD,
  ScaleUVAddCols3_WASMSIMD, and ScaleUVAddCols3_Any_WASMSIMD
- ScaleUVAddCols3_HVX (Hexagon HVX vrdelta + vmpy_VuhRuh)

Co-authored-by: Philipp Hancke <philipp.hancke@googlemail.com>
Bug: libyuv:564129034
R=rrwinterton@gmail.com
Change-Id: Ib9e14f3efcb097842c3d0e9fc9b473b6e2f81871
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8596436
Reviewed-by: richard winterton <rrwinterton@gmail.com>
 2026-10-19 15:56:38 -07:00
Frank Barchard
98697ab033 [libyuv] Add WASM SIMD128 compare, rotate, scale and row functions 
d8 geomean speedup vs C compiled with -O2 -msimd128:
File            AMD Zen 3  ARM Neoverse-V2
row_wasm.cc         5.67x            3.24x
scale_wasm.cc       5.47x            3.17x
compare_wasm.cc     4.58x            5.77x
rotate_wasm.cc      6.83x            6.03x

Bug: None
Change-Id: Ia06c805dc4029f94842c40e7301b2933beb8c1e5
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8524106
Reviewed-by: richard winterton <rrwinterton@gmail.com>
 2026-10-06 19:05:05 -07:00