diff options
| author | Ian Romanick <[email protected]> | 2018-08-01 19:34:02 -0700 |
|---|---|---|
| committer | Ian Romanick <[email protected]> | 2018-08-04 01:12:03 -0700 |
| commit | 3b07d28f810457a3c6176504c9d6c65ed0697e34 (patch) | |
| tree | 19a348e46f43e62bacda112aa3110d2cd2a2b9f0 | |
| parent | c658b6c4c8ecf99de35065381ceec5bef7d7ecdf (diff) | |
nir: Transform expressions of b2f(a) and b2f(b) to a == b
All Gen7+ platforms had similar results. (Skylake shown)
total instructions in shared programs: 14276886 -> 14276838 (<.01%)
instructions in affected programs: 312 -> 264 (-15.38%)
helped: 2
HURT: 0
total cycles in shared programs: 532578395 -> 532570985 (<.01%)
cycles in affected programs: 682562 -> 675152 (-1.09%)
helped: 374
HURT: 4
helped stats (abs) min: 2 max: 200 x̄: 20.39 x̃: 18
helped stats (rel) min: 0.07% max: 11.64% x̄: 1.25% x̃: 1.28%
HURT stats (abs) min: 2 max: 114 x̄: 53.50 x̃: 49
HURT stats (rel) min: 0.06% max: 11.70% x̄: 5.02% x̃: 4.15%
95% mean confidence interval for cycles value: -21.30 -17.91
95% mean confidence interval for cycles %-change: -1.30% -1.06%
Cycles are helped.
Sandy Bridge
total instructions in shared programs: 10488123 -> 10488075 (<.01%)
instructions in affected programs: 336 -> 288 (-14.29%)
helped: 2
HURT: 0
total cycles in shared programs: 150260379 -> 150260439 (<.01%)
cycles in affected programs: 4726 -> 4786 (1.27%)
helped: 0
HURT: 2
No changes on Iron Lake or GM45.
Signed-off-by: Ian Romanick <[email protected]>
Reviewed-by: Thomas Helland <[email protected]>
| -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 c1ab9dd3c83..ac53d77383d 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -183,6 +183,9 @@ optimizations = [ (('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))), + (('feq', ('fadd', ('b2f', a), ('fneg', ('b2f', b))), 0.0), ('ieq', a, b)), + (('feq', ('b2f', a) , ('b2f', b) ), ('ieq', a, b)), + (('feq', ('fneg', ('b2f', a)), ('fneg', ('b2f', b))), ('ieq', a, b)), # -(b2f(a) + b2f(b)) < 0 # 0 < b2f(a) + b2f(b) |