From: Ian Romanick <ian.d.roman...@intel.com>
I noticed this when I tried to do frexp(float(some_unsigned)) in the
ir_unop_find_lsb lowering pass. The code generated for frexp() uses
fabs, and this resulted in an extra instruction. Ultimately I ended up
not using frexp.
Signed-off-by: Ian Romanick <ian.d.roman...@intel.com>
---
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 fd22801..e3d83d4 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -75,6 +75,7 @@ optimizations = [
(('ineg', ('ineg', a)), a),
(('fabs', ('fabs', a)), ('fabs', a)),
(('fabs', ('fneg', a)), ('fabs', a)),
+ (('fabs', ('u2f', a)), ('u2f', a)),
(('iabs', ('iabs', a)), ('iabs', a)),
(('iabs', ('ineg', a)), ('iabs', a)),
(('~fadd', a, 0.0), a),
--
2.5.5
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