diff options
| author | Ian Romanick <[email protected]> | 2016-06-27 11:38:15 -0700 |
|---|---|---|
| committer | Ian Romanick <[email protected]> | 2016-07-19 12:19:30 -0700 |
| commit | 0b626d75241213f2c5535b38aee233d6cdbed781 (patch) | |
| tree | 554f7a39c9e44232b357302404c6c5449c1bd867 | |
| parent | 94296be276bf9c0a574df262b5d45f1bf38918ff (diff) | |
nir/algebraic: Optimize fabs(u2f(x))
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 <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index 7d04ef941b7..0f0896be5df 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), |