Porting/ncnn

Finished

• Translate x86_64 SSE to ppc64le VSX intrinsics
• VSX toolchains: check for SSE2 support
• Add POWER8 VSX toolchains
• load_param_mem pybind
• test_squeezenet failed under Lubuntu 16.04 PowerPC 32-bit
• support big endian platform, add powerpc ci
• Update POWER Clang version docs
• Update Vulkan dependency docs

In progress

• CI missing for POWER9/Clang
• Replace SSE with native VSX

VSX Targets

When running Real-ESRGAN in ncnn on POWER9, most CPU time (over 81%) is spent inside gemm_transB_packed_tile in convolution_3x3_winograd.h, which uses SSE2. This may be a good target for rewriting in native VSX.

See Also

• chaiNNer
• ONNX
• PyTorch