On Tue, Jun 14, 2011 at 4:59 PM, Fang, Changpeng <changpeng.f...@amd.com> wrote: > > >> >> So, is it OK to commit this patch to trunk, and H.J's original patch + this >> to 4.6 branch? > >>I have no problems on -mtune=Bulldozer. But I object -mtune=generic >>change and did suggest a different approach for -mtune=generic. > > What's your suggested approach for -mtune=generic? > > My understanding of putting something into -mtune=generic is that all are > happy, or > some are willing to lose. This rule guided us not to turn on software > prefetching for > -mtune=generic. > > I would like to hear your suggestion that sandy bridge could get the > performance while > bulldozer does not lose from splitting avx256 unaligned loads! > > Thanks,
See: http://gcc.gnu.org/ml/gcc-patches/2006-01/msg01045.html for how we did it last time. -- H.J.
