From 3b07d28f810457a3c6176504c9d6c65ed0697e34 Mon Sep 17 00:00:00 2001 From: Ian Romanick Date: Wed, 1 Aug 2018 19:34:02 -0700 Subject: nir: Transform expressions of b2f(a) and b2f(b) to a == b MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Thomas Helland --- src/compiler/nir/nir_opt_algebraic.py | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/compiler') 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) -- cgit v1.2.3