Lionel Landwerlin efcba73b49 brw: switch to new sampler payload description scheme
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>
2025-10-16 12:08:15 +00:00
2025-02-23 00:31:59 +01:00
2025-10-16 10:45:32 +00:00
2025-01-08 20:37:51 +00:00
2025-09-16 19:45:15 +00:00
2025-08-31 15:38:27 +00:00
2025-10-16 03:31:58 +00:00

`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library
======================================================


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