diff options
| author | Elie TOURNIER <[email protected]> | 2017-01-18 11:23:22 +0000 |
|---|---|---|
| committer | Jason Ekstrand <[email protected]> | 2017-01-19 21:44:28 -0800 |
| commit | 9fdaeb7776c51e45646502ce4b6420a9652cd824 (patch) | |
| tree | 2aba551c9da0875a707430be9db3c8826120a8c8 | |
| parent | f22ee14644143b5edeed7f345b93fb361c16c71b (diff) | |
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 <[email protected]>
Reviewed-by: Plamena Manolova <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 12 |
1 files changed, 12 insertions, 0 deletions
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'), |