fflas-ffpack cannot compile with only AVX512F

Question

fflas-ffpack cannot compile with only AVX512F

Closed this issue 4 years ago · 1 comments

The file fflas-ffpack/fflas/fflas_simd/simd512_int64.inl cannot be compiled if only AVX512F is available. It requires AVX512DQ to works.

The implementation of the mod method (around line 800) calls Simd512<double>::mod. But this method is only available if __FFLASFFPACK_HAVE_AVX512DQ_INSTRUCTIONS is defined (around line 500 in fflas-ffpack/fflas/fflas_simd/simd512_double.inl). This macro is only defined if __AVX512DQ__ is defined.

Answer 1 · 2021-03-25T19:25:09.000Z

Closing as we are now using -march=native or user provided flags, and that there is currently no architecture with AVX512F and no AVX512DQ.