https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100808
--- Comment #1 from Jens Seifert <jens.seifert at de dot ibm.com> --- https://gcc.gnu.org/onlinedocs/gcc/PowerPC-AltiVec-Built-in-Functions-Available-on-ISA-3_002e1.html vector unsigned long long int vec_gnb (vector unsigned __int128, const unsigned char) should be unsigned long long int vec_gnb (vector unsigned __int128, const unsigned char) vgnb instruction returns result in GPR.
