Find a file
Caio Oliveira 2e2b83f72d intel/brw: Use CSE for LOAD_SUBGROUP_INVOCATION
Instead of emitting a single one at the top, and making reference to it,
emit the virtual instruction as needed and let CSE do its job.

Since load_subgroup_invocation now can appear not at the start of the
shader, use UNDEF in all cases to ensure that the liveness of the
destination doesn't extend to the first partial write done here (it was
being used only for SIMD > 8 before).

Note this option was considered in the past
6132992cdb but at the time dismissed.  The
difference now is that the lowering of the virtual instruction happens
earlier than the scheduling.

The motivation for this change is to allow passes other than the NIR
conversion to use this value.  The alternative of storing a `brw_reg` in
the shader (instead of NIR state) gets complicated by passes like
compact_vgrfs, that move VGRFs around (and update the instructions).
This and maybe other passes would have to care about the brw_reg.

Fossil-db numbers, TGL

```
*** Shaders only in 'after' results are ignored:
steam-native/shadow_of_the_tomb_raider/c683ea5067ee157d/fs.32/0, steam-native/shadow_of_the_tomb_raider/f4df450c3cef40b4/fs.32/0, steam-native/shadow_of_the_tomb_raider/94b708fb8e3d9597/fs.32/0, steam-native/shadow_of_the_tomb_raider/19d44c328edabd30/fs.32/0, steam-native/shadow_of_the_tomb_raider/8a7dcbd5a74a19bf/fs.32/0, and 366 more
from 4 apps: steam-dxvk/alan_wake, steam-dxvk/batman_arkham_city_goty, steam-dxvk/batman_arkham_origins, steam-native/shadow_of_the_tomb_raider

*** Shaders only in 'before' results are ignored:
steam-dxvk/octopath_traveler/aaa3d10acb726906/fs.32/0, steam-dxvk/batman_arkham_origins/e6872ae23569c35f/fs.32/0, steam-dxvk/octopath_traveler/fd33a99fa5c271a8/fs.32/0, steam-dxvk/octopath_traveler/9a077cdc16f24520/fs.32/0, steam-dxvk/batman_arkham_city_goty/fac7b438ad52f622/fs.32/0, and 12 more
from 4 apps: steam-dxvk/batman_arkham_city_goty, steam-dxvk/batman_arkham_origins, steam-dxvk/octopath_traveler, steam-native/shadow_of_the_tomb_raider

Totals:
Instrs: 149752381 -> 149751337 (-0.00%); split: -0.00%, +0.00%
Cycle count: 11553609349 -> 11549970294 (-0.03%); split: -0.06%, +0.03%
Spill count: 42763 -> 42764 (+0.00%); split: -0.01%, +0.01%
Fill count: 75650 -> 75651 (+0.00%); split: -0.00%, +0.01%
Max live registers: 31725096 -> 31671792 (-0.17%)
Max dispatch width: 5546008 -> 5551672 (+0.10%); split: +0.11%, -0.00%

Totals from 52574 (8.34% of 630441) affected shaders:
Instrs: 9535159 -> 9534115 (-0.01%); split: -0.03%, +0.02%
Cycle count: 1006627109 -> 1002988054 (-0.36%); split: -0.65%, +0.29%
Spill count: 11588 -> 11589 (+0.01%); split: -0.03%, +0.03%
Fill count: 21057 -> 21058 (+0.00%); split: -0.01%, +0.02%
Max live registers: 1992493 -> 1939189 (-2.68%)
Max dispatch width: 559696 -> 565360 (+1.01%); split: +1.06%, -0.05%
```

and DG2

```
*** Shaders only in 'after' results are ignored:
steam-native/shadow_of_the_tomb_raider/1f95a9d3db21df85/fs.32/0, steam-native/shadow_of_the_tomb_raider/56b87c4a46613a2a/fs.32/0, steam-native/shadow_of_the_tomb_raider/a74b4137f85dbbd3/fs.32/0, steam-native/shadow_of_the_tomb_raider/e07e38d3f48e8402/fs.32/0, steam-native/shadow_of_the_tomb_raider/206336789c48996c/fs.32/0, and 268 more
from 4 apps: steam-dxvk/alan_wake, steam-dxvk/batman_arkham_city_goty, steam-dxvk/batman_arkham_origins, steam-native/shadow_of_the_tomb_raider

*** Shaders only in 'before' results are ignored:
steam-native/shadow_of_the_tomb_raider/0420d7c3a2ea99ec/fs.32/0, steam-native/shadow_of_the_tomb_raider/2ff39f8bf7d24abb/fs.32/0, steam-native/shadow_of_the_tomb_raider/92d7be2824bd9659/fs.32/0, steam-native/shadow_of_the_tomb_raider/f09ca6d2ecf18015/fs.32/0, steam-native/shadow_of_the_tomb_raider/490f8ffd59e52949/fs.32/0, and 205 more
from 3 apps: steam-dxvk/batman_arkham_city_goty, steam-dxvk/batman_arkham_origins, steam-native/shadow_of_the_tomb_raider

Totals:
Instrs: 151597619 -> 151599914 (+0.00%); split: -0.00%, +0.00%
Subgroup size: 7699776 -> 7699784 (+0.00%)
Cycle count: 12738501989 -> 12739841170 (+0.01%); split: -0.01%, +0.02%
Spill count: 61283 -> 61274 (-0.01%)
Fill count: 119886 -> 119849 (-0.03%)
Max live registers: 31810432 -> 31758920 (-0.16%)
Max dispatch width: 5540128 -> 5541136 (+0.02%); split: +0.08%, -0.06%

Totals from 49286 (7.81% of 631231) affected shaders:
Instrs: 8607753 -> 8610048 (+0.03%); split: -0.01%, +0.04%
Subgroup size: 857752 -> 857760 (+0.00%)
Cycle count: 305939495 -> 307278676 (+0.44%); split: -0.28%, +0.72%
Spill count: 6339 -> 6330 (-0.14%)
Fill count: 12571 -> 12534 (-0.29%)
Max live registers: 1788346 -> 1736834 (-2.88%)
Max dispatch width: 510920 -> 511928 (+0.20%); split: +0.85%, -0.66%
```

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30489>
2024-08-08 18:20:49 +00:00
.ci-farms svga/ci: enable vmware farm 2024-08-08 16:22:39 +00:00
.ci-farms-disabled svga/ci: enable vmware farm 2024-08-08 16:22:39 +00:00
.github/workflows add zink to macos ci 2022-11-22 19:04:13 +00:00
.gitlab gitlab: Reference hang debugging documenttion 2024-05-16 09:47:53 +00:00
.gitlab-ci Uprev Piglit to 0453436872b6e4d502c2e87817addb95e0d77e3b 2024-08-08 02:25:45 +00:00
android android: fix build in multiple ways 2024-08-07 18:07:09 +00:00
bin bin/ci: crnm: Use frozen set for statuses 2024-08-07 17:25:46 +00:00
build-support meson: move tsan-blacklist.txt to build-support with the other build support files 2024-05-01 07:05:12 +00:00
docs docs/android: Add llvmpipe instructions 2024-08-08 09:04:47 +00:00
include intel: Sync xe_drm.h 2024-08-05 07:00:10 -07:00
src intel/brw: Use CSE for LOAD_SUBGROUP_INVOCATION 2024-08-08 18:20:49 +00:00
subprojects meson: Add indexmap rust dependencies 2024-07-03 00:07:54 +00:00
.clang-format meson: enable the clang-format target 2023-05-29 11:57:08 +00:00
.clang-format-ignore ci: enforce formatting for RADV & ACO 2023-06-16 19:59:52 +00:00
.clang-format-include teflon: Initial commit 2024-01-24 10:02:10 +00:00
.dir-locals.el dir-locals.el: Adds White Space support 2016-11-14 19:17:49 +02:00
.editorconfig glsl: Fixes ident issue in glsl_parser.yy and update editorconfig for it 2022-12-16 19:02:17 +00:00
.git-blame-ignore-revs freedreno: Add reformatting commits to .git-blame-ignore-revs 2023-09-22 02:07:36 +00:00
.gitattributes gitlab: Highlight .cl as C 2023-11-02 11:37:46 +00:00
.gitignore .gitignore: add .cache folder 2024-05-13 14:32:12 +00:00
.gitlab-ci.yml ci/image-tags: rename DEBIAN_X86_64_TEST_*_TAG to drop the x86 mention 2024-05-23 06:00:50 +02:00
.graphqlrc.yml ci/bin: Add utility to find jobs dependencies 2022-08-03 23:10:37 +00:00
.mailmap mailmap: update rohan's primary email address 2024-06-19 09:06:15 +00:00
.mr-label-maker.yml mr-label-maker: Add d3d10umd label rules 2024-07-30 17:46:47 +00:00
CODEOWNERS CODEOWNERS: update Imagination maintainers 2024-01-19 10:26:15 +00:00
meson.build meson: centralize checking for new enough meson for rust support 2024-07-31 16:22:43 +00:00
meson_options.txt meson,ci: remove dead kmsro option in gallium-drivers 2024-08-01 14:16:28 +00:00
README.rst docs: Match README installation guide with meson.rst 2024-07-27 11:53:53 +00:00
VERSION VERSION: bump to 24.3 2024-07-19 16:37:23 +00:00

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


Source
------

This repository lives at https://gitlab.freedesktop.org/mesa/mesa.
Other repositories are likely forks, and code found there is not supported.


Build & install
---------------

You can find more information in our documentation (`docs/install.rst
<https://docs.mesa3d.org/install.html>`_), but the recommended way is to use
Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_):

.. code-block:: sh

  $ meson setup build
  $ ninja -C build/
  $ sudo ninja -C build/ install

Support
-------

Many Mesa devs hang on IRC; if you're not sure which channel is
appropriate, you should ask your question on `OFTC's #dri-devel
<irc://irc.oftc.net/dri-devel>`_, someone will redirect you if
necessary.
Remember that not everyone is in the same timezone as you, so it might
take a while before someone qualified sees your question.
To figure out who you're talking to, or which nick to ping for your
question, check out `Who's Who on IRC
<https://dri.freedesktop.org/wiki/WhosWho/>`_.

The next best option is to ask your question in an email to the
mailing lists: `mesa-dev\@lists.freedesktop.org
<https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_


Bug reports
-----------

If you think something isn't working properly, please file a bug report
(`docs/bugs.rst <https://docs.mesa3d.org/bugs.html>`_).


Contributing
------------

Contributions are welcome, and step-by-step instructions can be found in our
documentation (`docs/submittingpatches.rst
<https://docs.mesa3d.org/submittingpatches.html>`_).

Note that Mesa uses gitlab for patches submission, review and discussions.