On Wed, Aug 25, 2010 at 8:27 AM, Ulrich Drepper <drepper@redhat.com> wrote: > None of this applies to x86-64? Then why should we have this test for bsf on x86-64? > BSF is also slow on Atom in 64bit. We will submit a patch to avoid BSF in 64bit strlen when Slow_BSF is set. -- H.J.