https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88035
MCCCS <mcccs at gmx dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mcccs at gmx dot com --- Comment #1 from MCCCS <mcccs at gmx dot com> --- Only the `_mm_` reduce-intrinsics don't exist. You can still call them from GCC by 1) Opening the table https://github.com/llvm-mirror/clang/blob/master/lib/Headers/avx512dqintrin.h 2) Ctrl + F for the function (e.g. _mm512_reduce_round_pd) 3) Call the function in the definition (e.g. __builtin_ia32_reducepd512_mask) But this is only a workaround, those `_mm_` functions/macros should be added, I agree.