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Dylan Baker 83c52f75d0 intel/compiler/brw: fix potential unsigned overflow
Coverity notices that if `util_last_bit()` returns 0, and we subtract 1,
then the unsigned will overflow before being converted. We could cast to
eliminate that error, but the entire optimization function would do
nothing if tex->required_params == 0 (the way that we would get here),
so let's just not do work if we know we don't need to *and* avoid this
overflow.

CID: 1667241
Fixes: efcba73b49 ("brw: switch to new sampler payload description scheme")
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38009>
2025-10-24 07:52:09 -07:00
.ci-farms Revert "ci: disable Collabora's farm due to maintenance" 2025-10-06 13:00:52 +02:00
.ci-farms-disabled Revert "ci: disable Collabora's farm due to maintenance" 2025-10-06 13:00:52 +02:00
.github/workflows meson: remove unused osmesa option 2025-06-23 06:42:50 +00:00
.gitlab docs: update gitlab docs urls 2025-02-23 00:31:59 +01:00
.gitlab-ci venus: skip feedback cmd record on incompatible queue families 2025-10-23 08:57:12 +00:00
.marge/hooks ci: pipeline_message: reset empty errors 2025-01-07 05:08:10 +00:00
android android: fix building rules for i915, r300 2025-10-08 23:43:33 +02:00
bin ci,marge_queue: read token from file by default 2025-10-16 17:40:51 +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: update/fix vk spec urls 2025-10-22 09:23:34 +02:00
include intel/dev: Add NVL-S/U PCI IDs (with FORCE_PROBE required) 2025-10-23 21:47:29 +00:00
licenses licenses: add missing licenses 2025-01-08 20:37:51 +00:00
src intel/compiler/brw: fix potential unsigned overflow 2025-10-24 07:52:09 -07:00
subprojects ci: Bump DirectX-Headers and Agility SDK dependencies to 1.618.1 2025-10-01 14:46:15 -04:00
.clang-format
.clang-format-ignore ci: enforce formatting for RADV & ACO 2023-06-16 19:59:52 +00:00
.clang-format-include ethos: Initial commit of a driver for the Arm Ethos-U65 NPU. 2025-10-15 20:10:15 +00:00
.dir-locals.el
.editorconfig editorconfig: move OpenCL configuration to root 2025-08-30 22:49:08 -07:00
.git-blame-ignore-revs freedreno: Add register renaming to .git-blame-ignore-revs 2025-07-03 12:50:04 +00:00
.gitattributes gitlab: Highlight .cl as C 2023-11-02 11:37:46 +00:00
.gitignore intel/mda: Add code to produce mesa debug archives 2025-09-24 23:08:45 -07:00
.gitlab-ci.yml ci: Disable broken MR check in sanity job 2025-10-09 09:05:56 +00:00
.graphqlrc.yml
.mailmap mailmap: Update for Dylan Baker 2025-09-16 19:45:15 +00:00
.mr-label-maker.yml mr-label-maker: Add KosmicKrisp 2025-10-21 02:28:09 +00:00
.shellcheckrc ci: move shellcheck options to .shellcheckrc 2024-10-24 22:43:03 +00:00
CODEOWNERS CODEOWNERS: Add KosmicKrisp owners 2025-10-21 02:28:09 +00:00
meson.build kk: Add KosmicKrisp 2025-10-20 17:46:38 +00:00
meson.options kk: Add KosmicKrisp 2025-10-20 17:46:38 +00:00
README.rst docs: Match README installation guide with meson.rst 2024-07-27 11:53:53 +00:00
rustfmt.toml mesa: Add rustfmt.toml 2024-11-18 22:29:14 +00:00
VERSION Version: Bump to 26.0 2025-10-16 03:31:58 +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.