From 4c42e1116b552cca1ed667c20ae9ba966b580983 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Tue, 10 Feb 2015 21:43:32 -0800 Subject: [PATCH] nir: Recognize open-coded fmin/fmax. And unfortunately other shaders do the same thing but with >=/<= which we can't apply this optimization to because of NaNs. instructions in affected programs: 23309 -> 22938 (-1.59%) Reviewed-by: Kenneth Graunke --- src/glsl/nir/nir_opt_algebraic.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py index 2b4259e4654..83223f768cd 100644 --- a/src/glsl/nir/nir_opt_algebraic.py +++ b/src/glsl/nir/nir_opt_algebraic.py @@ -82,6 +82,8 @@ optimizations = [ (('feq', ('fadd', a, b), 0.0), ('feq', a, ('fneg', b))), (('fne', ('fadd', a, b), 0.0), ('fne', a, ('fneg', b))), (('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)), + (('bcsel', ('flt', a, b), a, b), ('fmin', a, b)), + (('bcsel', ('flt', a, b), b, a), ('fmax', a, b)), (('fmin', ('fmax', a, 0.0), 1.0), ('fsat', a)), # Comparison with the same args. Note that these are not done for # the float versions because NaN always returns false on float