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nir/opt_algebraic: optimize b2f(a != 0) * a

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Just D3D9 things.

Foz-DB Navi21:
Totals from 137 (0.17% of 79377) affected shaders:
MaxWaves: 3366 -> 3370 (+0.12%); split: +0.24%, -0.12%
Instrs: 76462 -> 72091 (-5.72%)
CodeSize: 411584 -> 380792 (-7.48%)
Latency: 279472 -> 275505 (-1.42%); split: -2.01%, +0.59%
InvThroughput: 71311 -> 65369 (-8.33%)
VClause: 1587 -> 1612 (+1.58%); split: -1.01%, +2.58%
SClause: 1111 -> 1105 (-0.54%); split: -1.08%, +0.54%
Copies: 5621 -> 5602 (-0.34%); split: -1.39%, +1.05%
PreSGPRs: 5266 -> 5241 (-0.47%); split: -0.51%, +0.04%
PreVGPRs: 4249 -> 4236 (-0.31%); split: -0.35%, +0.05%
VALU: 50049 -> 45901 (-8.29%)
SALU: 8948 -> 8818 (-1.45%)

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33674>
This commit is contained in:
Georg Lehmann 2025-02-21 17:23:04 +01:00 • committed by Marge Bot
parent e63acdd2b7
commit e0cebac14f
1 changed files with 2 additions and 0 deletions
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2
src/compiler/nir/nir_opt_algebraic.py
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@ -1502,6 +1502,8 @@ optimizations.extend([
(('ior', ('b2i', 'a@1'), ('b2i', 'b@1')), ('b2i', ('ior', a, b))),
(('fmul', ('b2f', 'a@1'), ('b2f', 'b@1')), ('b2f', ('iand', a, b))),
(('ffma', ('b2f', 'a@1'), ('b2f', 'b@1'), c), ('fadd', ('b2f', ('iand', a, b)), c)),
(('fmul', ('b2f', ('fneu', a, 0)), a), ('fmul', 1.0, a)),
(('ffma', ('b2f', ('fneu', a, 0)), a, b), ('fadd', a, b)),
(('fsat', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1'))), ('b2f', ('ior', a, b))),
(('iand', 'a@bool16', 1.0), ('b2f', a)),
(('iand', 'a@bool32', 1.0), ('b2f', a)),