Frank Barchard 1ddb18fb6b [libyuv] AVX512, NEON, WASM and RVV alpha copy and mirror rows ... 1275x1650 (US Letter 150 DPI, 1000 iterations) speedup: CPU ARGBExtractAlpha ARGBCopyYToAlpha ARGBMirror RGB24Mirror ----------------------------------------------------------------------- Intel Granite Rapids 1.00x 1.00x 1.00x 1.04x Intel Emerald Rapids 1.01x 0.97x 1.03x 1.07x Intel Sapphire Rapids 0.97x 1.01x 1.08x 1.26x Intel Ice Lake 0.99x 1.02x 0.97x 1.08x Intel Skylake-X 1.04x 1.03x 1.01x NA Intel Haswell NA NA NA NA AMD Turin (Zen 5) 1.01x 1.10x 1.25x 1.31x AMD Genoa (Zen 4) 0.97x 1.04x 1.09x 1.42x AMD Milan (Zen 3) NA NA NA NA AMD Rome (Zen 2) NA NA NA NA NVIDIA Grace (V2) 1.57x 2.51x NA NA Google Axion 2 1.12x 3.17x NA NA Ampere Siryn 1.06x 1.70x NA NA ARM Neoverse-N1 1.49x 2.01x NA NA Google Axion (Maple) 1.47x 2.03x NA NA ARM Cortex-A53 1.06x 1.69x NA NA Add AVX512BW ARGBExtractAlphaRow, ARGBCopyYToAlphaRow and ARGBMirrorRow, and AVX512VBMI RGB24MirrorRow, in row_gcc.cc and as intrinsics in row_win.cc. They are x64 only. The remainder is done with a k-mask (bzhi) zero-masked load and a masked store, so they handle any width without an Any wrapper and never access memory outside the row. RGB24MirrorRow_AVX512VBMI loads and stores 3 full zmm vectors per 64 pixels using 3 vpermi2b. The one output byte that comes from the third input vector is merged with a masked vpbroadcastb. The 1 to 63 pixel tail rebases the same tables by 192 - 3 * r; indices >= 128 are taken from the third vector with vpmovb2m and a masked vpermb. Add ARGBCopyYToAlphaRow_NEON for Arm 32 bit (vld4 + vst4) and AArch64 (zip + sli), and rewrite AArch64 ARGBExtractAlphaRow_NEON with ldp + uzp2. Both prefetch source and destination, which is 2.5x faster on Neoverse-N1 and 1.2x to 1.5x faster on Cortex-A53 for 1280x720. Add WASM SIMD ARGBExtractAlphaRow and ARGBCopyYToAlphaRow, using a swizzle table for CopyYToAlpha. Rework the RVV versions to use unit stride loads with vnsrl and vzext.vf4. R=rrwinterton@gmail.com Bug: None Change-Id: I436f27d70a3db0a2b176c91eb789a9491133cfcb Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8523531 Reviewed-by: richard winterton <rrwinterton@gmail.com> Commit-Queue: Frank Barchard <fbarchard@google.com>		2026-10-07 12:44:53 -07:00
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libyuv	[libyuv] AVX512, NEON, WASM and RVV alpha copy and mirror rows	2026-10-07 12:44:53 -07:00
libyuv.h	libyuv.h: Add scale_rgb.h and remove scale_row.h	2026-08-26 19:06:22 -07:00