On Thu, Jul 19, 2018 at 8:20 AM, Koval, Julia <julia.ko...@intel.com> wrote: > 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.
OK for mainline with a fixed ChangeLog entry, something like: ...: Replace rep_prefix with unrolling for size 512. Thanks, Uros.
