From 6702f1acde9e93e41783fd2f4a7999fed8d9cb75 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Mon, 22 Feb 2016 15:16:49 -0800 Subject: [PATCH] nir: Propagate negates up multiplication chains. total instructions in shared programs: 7112159 -> 7088092 (-0.34%) instructions in affected programs: 1374915 -> 1350848 (-1.75%) helped: 7392 HURT: 621 GAINED: 2 LOST: 2 --- src/compiler/nir/nir_opt_algebraic.py | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index 53633233f2b..c2e56e71734 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -269,6 +269,10 @@ optimizations = [ (('fabs', ('fsub', 0.0, a)), ('fabs', a)), (('iabs', ('isub', 0, a)), ('iabs', a)), + # Propagate negation up multiplication chains + (('fmul', ('fneg', a), b), ('fneg', ('fmul', a, b))), + (('imul', ('ineg', a), b), ('ineg', ('fmul', a, b))), + # Misc. lowering (('fmod', a, b), ('fsub', a, ('fmul', b, ('ffloor', ('fdiv', a, b)))), 'options->lower_fmod'), (('uadd_carry', a, b), ('b2i', ('ult', ('iadd', a, b), a)), 'options->lower_uadd_carry'), -- 2.30.2