Implement RAWToRGB24Row_WASMSIMD and RAWToRGB24Row_Any_WASMSIMD in
source/row_wasm.cc for RGB24ToRAW and RAWToRGB24 conversions:
- Process 16 pixels (48 bytes) per loop iteration using three 128-bit
loads, three byte-wise shuffles, and four 2-way blends.
- Use wasm_i8x16_relaxed_swizzle when __wasm_relaxed_simd__ is enabled
(compiling to a single vpshufb on x86 without bounds-checking
overhead) and fall back to wasm_i8x16_swizzle for baseline SIMD128.
- Add kCpuHasWASM (0x100) and kCpuHasWASMSIMD (0x101) CPU feature
flags and enable -msimd128 in BUILD.bazel, BUILD.gn, and
CMakeLists.txt for WebAssembly targets.
Performance (RAWToRGB24_Opt, 1280x720, V8 d8):
CPU WASM C SIMD128 Relaxed SIMD Spd Rlx Spd
-------------------------------------------------------------------
AMD Zen 4 595.0 us 137.0 us 84.0 us 4.34x 7.08x
AMD Zen 3 708.0 us 148.0 us 107.0 us 4.78x 6.62x
AMD Zen 5 375.0 us 107.0 us 67.0 us 3.50x 5.60x
ARM Neoverse-V2 638.0 us 118.0 us 116.0 us 5.41x 5.50x
ARM Neoverse-N1 1046.0 us 294.0 us 294.0 us 3.56x 3.56x
Intel Ice Lake 707.0 us 209.0 us 220.0 us 3.38x 3.21x
Intel Haswell 1110.0 us 344.0 us 360.0 us 3.23x 3.08x
Intel Emerald Rapids 519.0 us 207.0 us 208.0 us 2.51x 2.50x
Intel Sapphire Rapids 551.0 us 220.0 us 255.0 us 2.50x 2.16x
ARM Cortex-A53 14440.0 us 8660.0us 6920.0us 1.67x 2.09x
Intel Granite Rapids 453.0 us 225.0 us 221.0 us 2.01x 2.05x
Bug: 42271072
Test: libyuv_test --gunit_filter=*RAWToRGB24*:*RGB24ToRAW*:*Cpu*
Change-Id: Id902668263a2ab70aa300eeeea18851490c917b5
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8515581
Reviewed-by: richard winterton <rrwinterton@gmail.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>
