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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
..
testdata Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
basictypes_test.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
color_test.cc [libyuv] Enable LIBYUV_ENABLE_ROWWIN and MSAN_MEMSET for MSan builds 2026-09-28 10:49:58 -07:00
compare_test.cc [libyuv] Optimize CalcFrameSsim with 2-row 4x4 tile buffer and SIMD 2026-10-15 23:22:58 -07:00
convert_argb_test.cc clang format and bump version 2026-09-28 10:42:45 -07:00
convert_test.cc Add 25 native k-masked AVX-512 row kernels 2026-10-12 18:14:41 -07:00
cpu_test.cc [libyuv] Add Qualcomm Hexagon HVX SIMD support 2026-10-19 14:16:18 -07:00
cpu_thread_test.cc Unittests use ASSERT instead of EXPECT 2026-05-11 19:10:47 -07:00
math_test.cc [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 2026-08-28 08:32:19 -07:00
planar_test.cc [libyuv] Add Qualcomm Hexagon HVX SIMD support 2026-10-19 14:16:18 -07:00
rotate_argb_test.cc [libyuv] Optimize RotatePlane_16 SIMD and compact 32-bit transposes 2026-10-12 10:57:34 -07:00
rotate_test.cc [libyuv] Optimize RotatePlane_16 SIMD and compact 32-bit transposes 2026-10-12 10:57:34 -07:00
scale_argb_test.cc Avoid signed int overflow in scale functions using uint32_t 2026-10-14 23:16:54 -07:00
scale_plane_test.cc Avoid signed int overflow in scale functions using uint32_t 2026-10-14 23:16:54 -07:00
scale_rgb_test.cc Unittests use ASSERT instead of EXPECT 2026-05-11 19:10:47 -07:00
scale_test.cc convert, scale: Add P010/P210/P410 convert paths and NV16/NV24/Px10 scale 2026-09-23 20:43:22 -07:00
scale_uv_test.cc [libyuv] Multi-platform ScaleUVAddCols3 for ScaleUVBox at 3x 2026-10-19 15:56:38 -07:00
unit_test.cc [libyuv] Add Qualcomm Hexagon HVX SIMD support 2026-10-19 14:16:18 -07:00
unit_test.h [libyuv] Enable LIBYUV_ENABLE_ROWWIN and MSAN_MEMSET for MSan builds 2026-09-28 10:49:58 -07:00
video_common_test.cc convert, scale: Add P010/P210/P410 convert paths and NV16/NV24/Px10 scale 2026-09-23 20:43:22 -07:00