diff options
| author | Ian Romanick <[email protected]> | 2018-10-24 19:48:49 -0700 |
|---|---|---|
| committer | Ian Romanick <[email protected]> | 2019-05-14 11:38:22 -0700 |
| commit | 9725e45b3d06d7e226471e0c0eb8da0b0d54f448 (patch) | |
| tree | 2ff17a85d164d759c49d7f7ec1e938dbd2660224 /src/compiler | |
| parent | e2ad047779b02b48d35de8adaf92feed0f58aa3e (diff) | |
nir/algebraic: Simplify fsqrt domain guard
All Gen7+ platforms had similar results. (Ice Lake shown)
total instructions in shared programs: 17228376 -> 17225365 (-0.02%)
instructions in affected programs: 280732 -> 277721 (-1.07%)
helped: 1072
HURT: 0
helped stats (abs) min: 1 max: 12 x̄: 2.81 x̃: 2
helped stats (rel) min: 0.16% max: 5.10% x̄: 1.43% x̃: 1.07%
95% mean confidence interval for instructions value: -2.92 -2.70
95% mean confidence interval for instructions %-change: -1.48% -1.37%
Instructions are helped.
total cycles in shared programs: 360935690 -> 360842788 (-0.03%)
cycles in affected programs: 7838017 -> 7745115 (-1.19%)
helped: 1569
HURT: 69
helped stats (abs) min: 1 max: 1198 x̄: 63.53 x̃: 20
helped stats (rel) min: 0.06% max: 26.17% x̄: 3.44% x̃: 2.12%
HURT stats (abs) min: 1 max: 2820 x̄: 98.22 x̃: 47
HURT stats (rel) min: 0.05% max: 16.67% x̄: 3.50% x̃: 2.31%
95% mean confidence interval for cycles value: -63.55 -49.89
95% mean confidence interval for cycles %-change: -3.33% -2.96%
Cycles are helped.
No changes on any other platform.
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Thomas Helland <[email protected]>
Diffstat (limited to 'src/compiler')
| -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 ccf57fd4b86..15ac3bd32ca 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -570,6 +570,7 @@ optimizations = [ (('~flog2', ('frsq', a)), ('fmul', -0.5, ('flog2', a))), (('~flog2', ('fpow', a, b)), ('fmul', b, ('flog2', a))), (('~fmul', ('fexp2(is_used_once)', a), ('fexp2(is_used_once)', b)), ('fexp2', ('fadd', a, b))), + (('bcsel', ('flt', a, 0.0), 0.0, ('fsqrt', a)), ('fsqrt', ('fmax', a, 0.0))), # Division and reciprocal (('~fdiv', 1.0, a), ('frcp', a)), (('fdiv', a, b), ('fmul', a, ('frcp', b)), 'options->lower_fdiv'), |