OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

nir/algebraic: optimize bitfield_select(a, iand(a, b), c)

Browse Source 
fossils-db (Vega10):
Totals from 242 (0.17% of 139517) affected shaders:
CodeSize: 853752 -> 852752 (-0.12%)
Instrs: 165944 -> 165694 (-0.15%)
Cycles: 855720 -> 854528 (-0.14%)
VMEM: 83772 -> 83668 (-0.12%); split: +0.13%, -0.25%
SMEM: 12360 -> 12316 (-0.36%)
SClause: 8222 -> 8238 (+0.19%)

Only helps Control.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7531>
This commit is contained in:
Samuel Pitoiset
2020-11-10 14:10:35 +01:00
parent 68d70fb969
commit 1aa1c1aec2
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
src/compiler/nir/nir_opt_algebraic.py
View File

@@ -1401,6 +1401,7 @@ optimizations.extend([
# (src0 & src1) | (~src0 & src2). Constant fold if src2 is 0.
(('bitfield_select', a, b, 0), ('iand', a, b)),
(('bitfield_select', a, ('iand', a, b), c), ('bitfield_select', a, b, c)),
# Note that these opcodes are defined to only use the five least significant bits of 'offset' and 'bits'
(('ubfe', 'value', 'offset', ('iand', 31, 'bits')), ('ubfe', 'value', 'offset', 'bits')),