On Aug 10, 2016 1:00 AM, "Erik Faye-Lund" <<a href="mailto:kusmabite@gmail.com">kusmabite@gmail.com</a>> wrote: > > On Wed, Aug 10, 2016 at 4:30 AM, Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>> wrote: > > On Haswell (GL 3.3): > > > > total instructions in shared programs: 6211678 -> 6211584 (-0.00%) > > instructions in affected programs: 18968 -> 18874 (-0.50%) > > helped: 62 > > HURT: 0 > > LOST: 0 > > GAINED: 4 > > > > On Broadwell (GL 4.4): > > > > total instructions in shared programs: 11638930 -> 11638181 (-0.01%) > > instructions in affected programs: 84768 -> 84019 (-0.88%) > > helped: 505 > > HURT: 45 > > > > Signed-off-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>> > > --- > > src/compiler/nir/nir_opt_algebraic.py | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py > > index 0f0896b..1cf614c 100644 > > --- a/src/compiler/nir/nir_opt_algebraic.py > > +++ b/src/compiler/nir/nir_opt_algebraic.py > > @@ -180,6 +180,7 @@ optimizations = [ > > (('fmul', ('b2f', a), ('b2f', b)), ('b2f', ('iand', a, b))), > > (('fsat', ('fadd', ('b2f', a), ('b2f', b))), ('b2f', ('ior', a, b))), > > (('iand', 'a@bool', 1.0), ('b2f', a)), > > + (('ineg', ('b2i', 'a@bool')), a), > > (('flt', ('fneg', ('b2f', a)), 0), a), # Generated by TGSI KILL_IF. > > (('flt', ('fsub', 0.0, ('b2f', a)), 0), a), # Generated by TGSI KILL_IF. > > # Comparison with the same args. Note that these are not done for > > Are you sure this shouldn't be conditional? This being an improvement > sounds like an intel-ism, and not something that applies to most > hardware... Why? You're replacing two instructions with zero. That should help everyone.