https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91117
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Wolf . from comment #2) > Is there any way to still access MMX instructions/registers with intrinsics > in gcc-10 at all or is this bug "fixable but that code generation option > will go away entirely with gcc-10 so it wouldn't matter" then? The plan is to deprecate MMX instructions in gcc-10.