diff options
| author | Ian Romanick <[email protected]> | 2018-08-01 19:32:18 -0700 |
|---|---|---|
| committer | Ian Romanick <[email protected]> | 2018-08-04 01:12:03 -0700 |
| commit | 3aca80aabccaa2a785bd6d25f73bd1935d4dd35b (patch) | |
| tree | 27127e92844529a0e9567b9a4fef9160380271a8 /src/compiler | |
| parent | 1713c9718133aeec14c2776f1e2c5e8d75b29712 (diff) | |
nir: Transform expressions of b2f(a) and b2f(b) to !(a && b)
All Gen platforms had pretty similar results. (Skylake shown)
total cycles in shared programs: 532578400 -> 532578397 (<.01%)
cycles in affected programs: 2784 -> 2781 (-0.11%)
helped: 1
HURT: 1
helped stats (abs) min: 4 max: 4 x̄: 4.00 x̃: 4
helped stats (rel) min: 0.26% max: 0.26% x̄: 0.26% x̃: 0.26%
HURT stats (abs) min: 1 max: 1 x̄: 1.00 x̃: 1
HURT stats (rel) min: 0.08% max: 0.08% x̄: 0.08% x̃: 0.08%
v2: s/fmax/fmin/. Noticed by Thomas Helland.
Signed-off-by: Ian Romanick <[email protected]>
Reviewed-by: Thomas Helland <[email protected]>
Diffstat (limited to 'src/compiler')
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index 7431642c8a0..9ead2dd37d5 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -177,6 +177,9 @@ optimizations = [ (('feq', ('fmax', ('b2f', a), ('b2f', b)), 0.0), ('inot', ('ior', a, b))), (('feq', ('bcsel', a, 1.0, ('b2f', b)) , 0.0), ('inot', ('ior', a, b))), (('feq', ('b2f', a), ('fneg', ('b2f', b))), ('inot', ('ior', a, b))), + (('feq', ('fmul', ('b2f', a), ('b2f', b)), 0.0), ('inot', ('iand', a, b))), + (('feq', ('fmin', ('b2f', a), ('b2f', b)), 0.0), ('inot', ('iand', a, b))), + (('feq', ('bcsel', a, ('b2f', b), 0.0) , 0.0), ('inot', ('iand', a, b))), # -(b2f(a) + b2f(b)) < 0 # 0 < b2f(a) + b2f(b) |