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nir: Recognize mul(b2f(a), b2f(b)) as a logical AND.

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Transform this into b2f(and(a, b)).

total instructions in shared programs: 6205448 -> 6204391 (-0.02%)
instructions in affected programs:     284030 -> 282973 (-0.37%)
helped:                                903
HURT:                                  6

Acked-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
This commit is contained in:
Matt Turner 2015-03-17 23:30:32 -07:00
parent b481ebbe39
commit c31158d2cb
1 changed files with 2 additions and 0 deletions
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2
src/glsl/nir/nir_opt_algebraic.py
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@ -95,6 +95,8 @@ optimizations = [
(('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'),
(('fsat', ('fsat', a)), ('fsat', a)),
(('fmin', ('fmax', ('fmin', ('fmax', a, 0.0), 1.0), 0.0), 1.0), ('fmin', ('fmax', a, 0.0), 1.0)),
# Emulating booleans
(('fmul', ('b2f', a), ('b2f', b)), ('b2f', ('iand', a, b))),
# Comparison with the same args. Note that these are not done for
# the float versions because NaN always returns false on float
# inequalities.