On Wed, Mar 5, 2014 at 7:58 AM, Evgeny Stupachenko <evstu...@gmail.com> wrote: > Hi, > > The patch is for x86 Silvermont. > It improves x86 Silvermont vector cost model. > It gives +20% on facerec spec on Silvermont. > It passes make check and bootstrap on x86. > > Is this patch ok for stage1? > > ChangeLog: > > 2014-03-05 Evgeny Stupachenko <evstu...@gmail.com> > > * config/i386/x86-tune.def (TARGET_SLOW_PSHUFB): Target for slow byte > shuffle on some x86 architectures. > * config/i386/i386.h (TARGET_SLOW_PSHUFB): Ditto. > * config/i386/i386.c (processor_costs): Fixing vec_to_scalar_cost for > Silvermont according latency table. > (expand_vec_perm_even_odd_1): Avoid byte shuffles in architectures > where they are slow (TARGET_SLOW_PSHUFB). > (x86_add_stmt_cost): Fixing vector cost model for Silvermont. > > Thanks, > Evgeny
There are 3 separate changes in this patch: 1. Update slm_cost, which doesn't have a ChangeLog entry. 2. Add TARGET_SLOW_PSHUFB. 3. Update ix86_add_stmt_cost. I suggest you break it into 3 independent patches. Thanks. -- H.J.
