https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49244
--- Comment #16 from Paolo Bonzini <bonzini at gnu dot org> --- > This also suggests there's an error in the current x86_64 kernel > implementation > as the kernel bitops are supposed to operate on machine word-size locations, > so > it should be using BTSQ not BTSL Why? Since bts adjust the memory address according to the bit number, btsl and btsq are entirely the same instruction.
