Yes, it gives small improvements(~2%) on 557.xz on O2 and on 548.exchange(~2.5%) and 500.perlbench(~1%) on Ofast in rate mode.
> -----Original Message----- > From: Uros Bizjak [mailto:ubiz...@gmail.com] > Sent: Thursday, July 19, 2018 8:12 AM > To: Koval, Julia <julia.ko...@intel.com> > Cc: GCC Patches <gcc-patches@gcc.gnu.org> > Subject: Re: [patch, x86] Improve memcpy/memset strategy for Skylake. > > On Thu, Jul 19, 2018 at 7:00 AM, Koval, Julia <julia.ko...@intel.com> wrote: > > Hi, > > This patch improves memset/memcpy strategy for Skylake. Ok for trunk? > > Is this patch based on some benchmark data? > > Uros. > > > * gcc/config/i386/x86-tune-costs.h (skylake_memcpy, > > skylake_memcpy): Replace rep_prefix with unrolling on 512. > > > > Thanks, > > Julia > >
