https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80323
--- Comment #1 from Sven Woop <m...@sven-woop.de> --- Documentation of these can be found here: https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm512_int2mask These are supported by the latest ICC and Clang.