fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-24 15:20:10 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

nir/opt_algebraic: optimize fmax(ffma(a, b, c), 0.0) to fsat

Browse source 
Foz-DB Navi21:
Totals from 2621 (3.28% of 79789) affected shaders:
MaxWaves: 55744 -> 55736 (-0.01%)
Instrs: 2840180 -> 2832647 (-0.27%); split: -0.27%, +0.00%
CodeSize: 15497364 -> 15464692 (-0.21%); split: -0.21%, +0.00%
VGPRs: 138448 -> 138456 (+0.01%)
Latency: 22319512 -> 22307018 (-0.06%); split: -0.06%, +0.01%
InvThroughput: 5745108 -> 5729197 (-0.28%); split: -0.28%, +0.00%
Copies: 110279 -> 110268 (-0.01%); split: -0.04%, +0.03%
VALU: 2210578 -> 2203211 (-0.33%); split: -0.33%, +0.00%
SALU: 169014 -> 168841 (-0.10%)

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34125>
This commit is contained in:
Georg Lehmann 2025-03-22 07:08:37 +01:00 • committed by Marge Bot
parent f71fc26393
commit 18a0de1834
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
src/compiler/nir/nir_opt_algebraic.py
View file

@ -1031,6 +1031,12 @@ optimizations.extend([
(('fmax', ('fadd(is_used_once)', 'a(is_not_positive)', '#b(is_zero_to_one)'), 0.0),
('fsat', ('fadd', a, b)), '!options->lower_fsat'),
# ffma variants of the pattern above.
(('fmax', ('ffma(is_used_once)', 'a(is_not_positive)', 'b(is_not_negative)', '#c(is_zero_to_one)'), 0.0),
('fsat', ('ffma', a, b, c)), '!options->lower_fsat'),
(('fmax', ('ffma(is_used_once)', 'a', ('fneg', a), '#b(is_zero_to_one)'), 0.0),
('fsat', ('ffma', a, ('fneg', a), b)), '!options->lower_fsat'),
(('extract_u8', ('imin', ('imax', a, 0), 0xff), 0), ('imin', ('imax', a, 0), 0xff)),
# The ior versions are exact because fmin and fmax will always pick a