https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79880
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Ah, if you want to avoid the %xmm4, %r13, %xmm3, etc., you need .intel_syntax noprefix. And, the insn is invalid anyway, because you can't have the same mask and destination. In any case, this has nothing to do with gcc, that just passes the text through to gas.