On Thu, Apr 2, 2020 at 10:59 AM Gabriele Capannini via Gcc-help <gcc-help@xxxxxxxxxxx> wrote: > foo.cpp:32:13: error: ‘_mm256_atan_ps’ was not declared in this scope See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85236 This is apparently an Intel SVML (short vector math library) function, not an intrinsic that expands to a single hardware instruction, and we don't have support for SVML yet. It is also not clear how to implement that support, and where to implement it. Jim
