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nir/opt_algebraic: optimize open coded ffract

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Foz-DB Navi21:
Totals from 274 (0.34% of 79789) affected shaders:
Instrs: 522630 -> 522181 (-0.09%); split: -0.09%, +0.01%
CodeSize: 2880668 -> 2878940 (-0.06%); split: -0.07%, +0.01%
VGPRs: 14488 -> 14464 (-0.17%)
Latency: 4092358 -> 4091243 (-0.03%); split: -0.04%, +0.01%
InvThroughput: 1014148 -> 1013471 (-0.07%); split: -0.07%, +0.00%
VClause: 11646 -> 11639 (-0.06%)
SClause: 18614 -> 18611 (-0.02%)
Copies: 56248 -> 56309 (+0.11%); split: -0.05%, +0.16%
PreVGPRs: 13649 -> 13647 (-0.01%)
VALU: 359733 -> 359285 (-0.12%); split: -0.13%, +0.01%
SALU: 59719 -> 59720 (+0.00%)

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33369>
This commit is contained in:
Georg Lehmann 2025-02-04 09:17:08 +01:00 • committed by Marge Bot
parent f1f87d302f
commit d046ecf95a
1 changed files with 3 additions and 0 deletions
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3
src/compiler/nir/nir_opt_algebraic.py
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@ -476,6 +476,9 @@ optimizations.extend([
(('ffract@32', a), ('fsub', a, ('ffloor', a)), 'options->lower_ffract'),
(('ffract@64', a), ('fsub', a, ('ffloor', a)),
'(options->lower_ffract || (options->lower_doubles_options & nir_lower_dfract)) && !(options->lower_doubles_options & nir_lower_dfloor)'),
(('fadd@16', a, ('fneg(is_used_once)', ('ffloor(is_used_once)', a))), ('ffract', a), '!options->lower_ffract'),
(('fadd@32', a, ('fneg(is_used_once)', ('ffloor(is_used_once)', a))), ('ffract', a), '!options->lower_ffract'),
(('fadd@64', a, ('fneg(is_used_once)', ('ffloor(is_used_once)', a))), ('ffract', a), '!options->lower_ffract && !(options->lower_doubles_options & nir_lower_dfract)'),
(('fceil', a), ('fneg', ('ffloor', ('fneg', a))), 'options->lower_fceil'),
(('ffma@16', a, b, c), ('fadd', ('fmul', a, b), c), 'options->lower_ffma16'),
(('ffma@32', a, b, c), ('fadd', ('fmul', a, b), c), 'options->lower_ffma32'),