Hi Ximing, If your machine (and OS also) supports AVX2 instruction set then you are already compiling and using AVX2 version of DCT functions. x265 automatically detects & sets all assembly primitives to highest/latest available instruction sets.
When you run encoder, you can check command prompt output if cpu capabilities info shows AVX2 instruction set or not. You can get the source code of DCT AVX2 functions in dct8.asm file. Regards, Dnyaneshwar On Wed, Sep 16, 2015 at 6:25 PM, Ximing Cheng <chengximing1...@gmail.com> wrote: > I read the source code of the /source/common/vec/dct-sse3.cpp and I found > the comments said "Note: We have AVX2 assembly for these functions, but > since AVX2 is still somewhat rare on end-user PCs we still compile and link > these SSE3 intrinsic SIMD functions". > > But now both my PC and server support Intel AVX2 instruction set. If I > want to compile these functions with AVX2 assembly, where to find the AVX2 > version of source code of these functions? > > Thanks! > > _______________________________________________ > x265-devel mailing list > x265-devel@videolan.org > https://mailman.videolan.org/listinfo/x265-devel > >
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