http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50583
--- Comment #6 from Andi Kleen <andi-gcc at firstfloor dot org> 2011-09-30 23:35:29 UTC --- Can't say I'm a fan of adding such a heavy weight sequence into an intrinsic. Maybe better to simply leave out the intrinsics that cannot be implemented with loops? If someone wants a loop they better open code it. It would be nice if you implemented the ors, nands and ands with bts, btr etc if the second argument is a constant and only has one bit set.
