From: Ian Romanick <ian.d.roman...@intel.com>
Unlike the much older -abs(a) >= 0.0 transformation, this is not
precise. The behavior changes if the source is NaN.
No shader-db changes on any platform.
Signed-off-by: Ian Romanick <ian.d.roman...@intel.com>
---
src/compiler/nir/nir_opt_algebraic.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/compiler/nir/nir_opt_algebraic.py
b/src/compiler/nir/nir_opt_algebraic.py
index 7fc4ff1d407..c4f46b56d95 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -197,7 +197,7 @@ optimizations = [
# fabs(a) > 0.0
# fabs(a) != 0.0 because fabs(a) must be >= 0
# a != 0.0
- (('flt', 0.0, ('fabs', a)), ('fne', a, 0.0)),
+ (('~flt', 0.0, ('fabs', a)), ('fne', a, 0.0)),
(('fmax', ('b2f(is_used_once)', a),
('b2f', b)), ('b2f', ('ior', a, b))),
(('fmax', ('fneg(is_used_once)', ('b2f(is_used_once)', a)), ('fneg',
('b2f', b))), ('fneg', ('b2f', ('ior', a, b)))),
--
2.14.4
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