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nir/algebraic: Simplify fsat of fsign 

These allows us to not support fsign.sat in the Intel compiler backend,
and that will simplify some later changes.

No shader-db changes on any Intel platform.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Thomas Helland <thomashelland90@gmail.com>
This commit is contained in:
Ian Romanick 2018-09-09 13:40:02 -07:00
parent 1546204cdd
commit a68dd47b91
1 changed files with 1 additions and 0 deletions
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src/compiler/nir/nir_opt_algebraic.py
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@ -329,6 +329,7 @@ optimizations = [
(('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', ('fsign', a)), ('b2f', ('flt', 0.0, a))),
(('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'),
(('fsat', ('fsat', a)), ('fsat', a)),
(('fmin', ('fmax', ('fmin', ('fmax', a, b), c), b), c), ('fmin', ('fmax', a, b), c)),