From: Matt Turner Date: Fri, 30 Jun 2017 22:48:19 +0000 (-0700) Subject: nir: Optimize find_lsb/imsb/umsb error checks X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=aff108f2fd303ea4671541c8eca8550ddf69dc13;p=mesa.git nir: Optimize find_lsb/imsb/umsb error checks Two of the ARB_shader_ballot piglit tests hit the find_lsb case, removing some of the noise allowed me to better debug the test when it was failing. Reviewed-by: Connor Abbott --- diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index fe6e33d3139..df5854270c4 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -357,6 +357,17 @@ optimizations = [ (('~fadd', '#a', ('fadd', b, '#c')), ('fadd', ('fadd', a, c), b)), (('iadd', '#a', ('iadd', b, '#c')), ('iadd', ('iadd', a, c), b)), + # By definition... + (('bcsel', ('ige', ('find_lsb', a), 0), ('find_lsb', a), -1), ('find_lsb', a)), + (('bcsel', ('ige', ('ifind_msb', a), 0), ('ifind_msb', a), -1), ('ifind_msb', a)), + (('bcsel', ('ige', ('ufind_msb', a), 0), ('ufind_msb', a), -1), ('ufind_msb', a)), + + (('bcsel', ('ine', a, 0), ('find_lsb', a), -1), ('find_lsb', a)), + (('bcsel', ('ine', a, 0), ('ifind_msb', a), -1), ('ifind_msb', a)), + (('bcsel', ('ine', a, 0), ('ufind_msb', a), -1), ('ufind_msb', a)), + + (('bcsel', ('ine', a, -1), ('ifind_msb', a), -1), ('ifind_msb', a)), + # Misc. lowering (('fmod@32', a, b), ('fsub', a, ('fmul', b, ('ffloor', ('fdiv', a, b)))), 'options->lower_fmod32'), (('fmod@64', a, b), ('fsub', a, ('fmul', b, ('ffloor', ('fdiv', a, b)))), 'options->lower_fmod64'),