Instead of having abstracted opcodes, we target directly the HW format
at the NIR translation.
The payload description gives us the order of the payload sources (we
can use that for pretty printing) and we don't have to have a
complicated scheme in the logical send lowering for the ordering. All
we have to do is build the header if needed as well as the descriptors.
PTL Fossil-db stats:
Totals from 66759 (13.54% of 492917) affected shaders:
Instrs: 44289221 -> 43957404 (-0.75%); split: -0.81%, +0.06%
Send messages: 2050378 -> 2042607 (-0.38%)
Cycle count: 3878874713 -> 3712848434 (-4.28%); split: -4.44%, +0.16%
Max live registers: 8773179 -> 8770104 (-0.04%); split: -0.06%, +0.03%
Max dispatch width: 1677408 -> 1707952 (+1.82%); split: +1.85%, -0.03%
Non SSA regs after NIR: 11407821 -> 11421041 (+0.12%); split: -0.03%, +0.15%
GRF registers: 5686983 -> 5838785 (+2.67%); split: -0.24%, +2.91%
LNL Fossil-db stats:
Totals from 57911 (15.72% of 368381) affected shaders:
Instrs: 39448036 -> 38923650 (-1.33%); split: -1.41%, +0.08%
Subgroup size: 1241360 -> 1241392 (+0.00%)
Send messages: 1846696 -> 1845137 (-0.08%)
Cycle count: 3834818910 -> 3784003027 (-1.33%); split: -2.33%, +1.00%
Spill count: 21866 -> 22168 (+1.38%); split: -0.07%, +1.45%
Fill count: 59324 -> 60339 (+1.71%); split: -0.00%, +1.71%
Scratch Memory Size: 1479680 -> 1483776 (+0.28%)
Max live registers: 7521376 -> 7447841 (-0.98%); split: -1.04%, +0.06%
Non SSA regs after NIR: 9744605 -> 10113728 (+3.79%); split: -0.01%, +3.80%
Only 2 titles negatively impacted (spilling) :
- Shadow of the Tomb Raider
- Red Dead Redemption 2
All impacted shaders were already spilling.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37171>
v2 (idr): So much rebasing. Deleted a bunch of code that we're not
going to need yet.
v3 (Ken): bfn inst encoding fix
v4 (idr): Add BFN to brw_get_lowered_simd_width.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37186>
This keeps the directory structure a bit more organized:
- brw specific code
- elk specific code
- common NIR passes that could be used in both places
It also means that you can now 'git grep' in the brw directory without
finding a bunch of elk code, or having to "grep thing b*".
Reviewed-by: Dylan Baker <dylan.c.baker@intel.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37755>
2025-10-09 07:01:47 +00:00
Renamed from src/intel/compiler/brw_lower_simd_width.cpp (Browse further)
