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Implement Qualcomm Hexagon Vector Extensions (HVX) 128-byte SIMD optimizations and runtime CPU detection for Hexagon DSP targets: - CPU detection: Add kCpuHasHexagon and kCpuHasHVX flags, LIBYUV_DISABLE_HVX environment variable support, and Hexagon unit_test mmap/munmap shims. - Rotate/Transpose (rotate_hvx.cc): Implement TransposeWxH_HVX, TransposeUVWxH_HVX, TransposeWxH_16_HVX, and TransposeWxH_32_HVX using power-of-2 vdeal/vshuff butterfly networks. - Compare (compare_hvx.cc): Implement HammingDistance_HVX, SumSquareError_HVX, HashDjb2_HVX, and Ssim4x4Row_HVX. - Scale (scale_hvx.cc): Implement 16 scale row kernels including ScaleAddRow_HVX, ScaleRowDown2*_HVX (8-bit and 16-bit), ScaleRowDown4*_HVX, ScaleARGBRowDown2*_HVX, and ScaleUVRowDown2*_HVX. - Row functions (row_hvx.cc): Implement 58 row kernels covering copy/set/mirror, split/merge, 8/16-bit conversions, YUV-to-ARGB, ARGB-to-YUV, ARGB channel swizzles, blend, attenuate, and interpolate using hardware-predicated partial loads/stores. R=rrwinterton@gmail.com Bug: None Test: libyuv_unittest on Hexagon v81 simulator and Snapdragon 8 Elite Change-Id: Ib6713de51f6246d95e58c95e629ff03f18e3b91e Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8604586 Reviewed-by: richard winterton <rrwinterton@gmail.com> |
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| .. | ||
| deprecated_builds.md | ||
| environment_variables.md | ||
| feature_detection.md | ||
| filtering.md | ||
| formats.md | ||
| getting_started.md | ||
| rotation.md | ||