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nir: Recognize (a < c || b < c) as min(a, b) < c. 

... and (a >= c) || (b >= c) as max(a, b) >= c.

Similar to commit 97e6c1b9.

total instructions in shared programs: 6182276 -> 6182180 (-0.00%)
instructions in affected programs:     6400 -> 6304 (-1.50%)
helped:                                68
HURT:                                  4

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Glenn Kennard <glenn.kennard@gmail.com>
This commit is contained in:
Matt Turner 2015-05-05 20:25:07 -07:00
parent ceb8b739ce
commit f5cf74d8ba
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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@ -101,7 +101,9 @@ optimizations = [
(('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)),
(('ior', ('flt', a, b), ('flt', a, c)), ('flt', a, ('fmax', b, c))),
(('ior', ('flt', a, c), ('flt', b, c)), ('flt', ('fmin', a, b), c)),
(('ior', ('fge', a, b), ('fge', a, c)), ('fge', a, ('fmin', b, c))),
(('ior', ('fge', a, c), ('fge', b, c)), ('fge', ('fmax', a, b), c)),
(('slt', a, b), ('b2f', ('flt', a, b)), 'options->lower_scmp'),
(('sge', a, b), ('b2f', ('fge', a, b)), 'options->lower_scmp'),
(('seq', a, b), ('b2f', ('feq', a, b)), 'options->lower_scmp'),