<div>That make me think that I have some algebraic patches too. </div><div> </div>Reviewed-by: Elie Tournier <<a href="mailto:tournier.elie@gmail.com">tournier.elie@gmail.com</a>> On Saturday, 23 February 2019, Ian Romanick <<a href="mailto:idr@freedesktop.org">idr@freedesktop.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">From: Ian Romanick <<a href="mailto:ian.d.romanick@intel.com">ian.d.romanick@intel.com</a>> I noticed this while looking at a shader that was affected by Tim's "more loop unrolling" series. All Gen6+ platforms had similar results. (Skylake shown) total instructions in shared programs: 15437001 -> 15435259 (-0.01%) instructions in affected programs: 213651 -> 211909 (-0.82%) helped: 988 HURT: 0 helped stats (abs) min: 1 max: 27 x̄: 1.76 x̃: 1 helped stats (rel) min: 0.15% max: 11.54% x̄: 1.14% x̃: 0.59% 95% mean confidence interval for instructions value: -1.89 -1.63 95% mean confidence interval for instructions %-change: -1.23% -1.05% Instructions are helped. total cycles in shared programs: 383007378 -> 382997063 (<.01%) cycles in affected programs: 1650825 -> 1640510 (-0.62%) helped: 679 HURT: 302 helped stats (abs) min: 1 max: 348 x̄: 23.39 x̃: 14 helped stats (rel) min: 0.04% max: 28.77% x̄: 1.61% x̃: 0.98% HURT stats (abs) min: 1 max: 250 x̄: 18.43 x̃: 7 HURT stats (rel) min: 0.04% max: 25.86% x̄: 1.41% x̃: 0.53% 95% mean confidence interval for cycles value: -13.05 -7.98 95% mean confidence interval for cycles %-change: -0.86% -0.50% Cycles are helped. Iron Lake and GM45 had similar results. (GM45 shown) total instructions in shared programs: 5043616 -> 5043010 (-0.01%) instructions in affected programs: 119691 -> 119085 (-0.51%) helped: 432 HURT: 0 helped stats (abs) min: 1 max: 27 x̄: 1.40 x̃: 1 helped stats (rel) min: 0.10% max: 8.11% x̄: 0.66% x̃: 0.39% 95% mean confidence interval for instructions value: -1.58 -1.23 95% mean confidence interval for instructions %-change: -0.72% -0.59% Instructions are helped. total cycles in shared programs: 128139812 -> 128135762 (<.01%) cycles in affected programs: 3829724 -> 3825674 (-0.11%) helped: 602 HURT: 0 helped stats (abs) min: 2 max: 486 x̄: 6.73 x̃: 6 helped stats (rel) min: 0.02% max: 4.85% x̄: 0.19% x̃: 0.10% 95% mean confidence interval for cycles value: -8.40 -5.05 95% mean confidence interval for cycles %-change: -0.22% -0.16% Cycles are helped. --- 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 ba27d702b5d..c8fc938cc8f 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -127,6 +127,7 @@ optimizations = [ (('flrp@32', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 'options->lower_flrp32'), (('flrp@64', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 'options->lower_flrp64'), (('ffloor', a), ('fsub', a, ('ffract', a)), 'options->lower_ffloor'), + (('fadd', a, ('fneg', ('ffract', a))), ('ffloor', a), '!options->lower_ffloor'), (('ffract', a), ('fsub', a, ('ffloor', a)), 'options->lower_ffract'), (('fceil', a), ('fneg', ('ffloor', ('fneg', a))), 'options->lower_fceil'), (('~fadd', ('fmul', a, ('fadd', 1.0, ('fneg', ('b2f', 'c@1')))), ('fmul', b, ('b2f', c))), ('bcsel', c, b, a), 'options->lower_flrp32'), -- 2.14.4 _______________________________________________ mesa-dev mailing list <a href="mailto:mesa-dev@lists.freedesktop.org">mesa-dev@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/mesa-dev" target="_blank">https://lists.freedesktop.org/mailman/listinfo/mesa-dev</a></blockquote>