From 9fdaeb7776c51e45646502ce4b6420a9652cd824 Mon Sep 17 00:00:00 2001 From: Elie TOURNIER Date: Wed, 18 Jan 2017 11:23:22 +0000 Subject: [PATCH] nir: add min/max optimisation Add the following optimisations: min(x, -x) = -abs(x) min(x, -abs(x)) = -abs(x) min(x, abs(x)) = x max(x, -abs(x)) = x max(x, abs(x)) = abs(x) max(x, -x) = abs(x) shader-db: total instructions in shared programs: 13067779 -> 13067775 (-0.00%) instructions in affected programs: 249 -> 245 (-1.61%) helped: 4 HURT: 0 total cycles in shared programs: 252054838 -> 252054806 (-0.00%) cycles in affected programs: 504 -> 472 (-6.35%) helped: 2 HURT: 0 Signed-off-by: Elie Tournier Reviewed-by: Plamena Manolova Reviewed-by: Jason Ekstrand --- src/compiler/nir/nir_opt_algebraic.py | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index d7ad1f2fbf3..68938000098 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -171,6 +171,18 @@ optimizations = [ (('imax', a, a), a), (('umin', a, a), a), (('umax', a, a), a), + (('fmin', a, ('fneg', a)), ('fneg', ('fabs', a))), + (('imin', a, ('ineg', a)), ('ineg', ('iabs', a))), + (('fmin', a, ('fneg', ('fabs', a))), ('fneg', ('fabs', a))), + (('imin', a, ('ineg', ('iabs', a))), ('ineg', ('iabs', a))), + (('fmin', a, ('fabs', a)), a), + (('imin', a, ('iabs', a)), a), + (('fmax', a, ('fneg', ('fabs', a))), a), + (('imax', a, ('ineg', ('iabs', a))), a), + (('fmax', a, ('fabs', a)), ('fabs', a)), + (('imax', a, ('iabs', a)), ('iabs', a)), + (('fmax', a, ('fneg', a)), ('fabs', a)), + (('imax', a, ('ineg', a)), ('iabs', a)), (('~fmin', ('fmax', a, 0.0), 1.0), ('fsat', a), '!options->lower_fsat'), (('~fmax', ('fmin', a, 1.0), 0.0), ('fsat', a), '!options->lower_fsat'), (('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'), -- 2.30.2