Mesa 3D graphics library
Go to file
Karol Herbst ab71151624 nir/lower_int64: fix shift lowering
Starting with !19748 lowered 64 bit shifts were showing wrong results for
shifts with insignificant bits set.

nir shifts are defined to only look at the least significant bits. The
lowering has take this into account.

So there are two things going on:
1. the `ieq` and `uge` further down depend on `y` being masked.
2. the calculation of `reverse_count` actually depends on a masked `y` as
   well, due to the `(iabs (iadd y -32))` giving a different result for
   shifts > 31;

Fixes: 41f3e9e5f5 ("nir: Implement lowering of 64-bit shift operations")
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19995>
(cherry picked from commit 5398dd04bf)
2022-11-30 09:16:12 -08:00
.github/workflows ci: Rename ci.yml to macos.yml for consistence with main branch 2022-11-24 18:47:05 +00:00
.gitlab/issue_templates
.gitlab-ci CI: convert to use the new S3 server instead of the legacy minio 2022-11-11 02:29:52 +00:00
android Android.mk: Fix gnu++14 related build failures 2022-11-08 15:11:36 -08:00
bin bin/gen_release_notes.py: bump advertised vulkan version to 1.3 2022-08-04 11:33:21 -07:00
build-support
docs docs/zink: add missing required device-feature 2022-11-28 13:01:16 -08:00
include intel/pci_ids: Drop non-upstream dg2 pci-ids 2022-09-15 09:25:38 -07:00
src nir/lower_int64: fix shift lowering 2022-11-30 09:16:12 -08:00
subprojects meson,amd: Remove Windows libelf wrap 2022-09-25 03:13:14 +08:00
.dir-locals.el
.editorconfig ci/vs2019: Update editorconfig for ps1 files 2022-06-14 21:14:33 +00:00
.gitattributes
.gitignore
.gitlab-ci.yml CI: convert to use the new S3 server instead of the legacy minio 2022-11-11 02:29:52 +00:00
.mailmap mailmap: fix order of emails for Axel Davy 2022-07-27 21:36:23 +00:00
.pick_status.json nir/lower_int64: fix shift lowering 2022-11-30 09:16:12 -08:00
CODEOWNERS CODEOWNERS: evelikov renamed to xexaxo 2022-06-24 12:28:59 +00:00
README.rst
VERSION VERSION: update to 22.2.4 2022-11-16 15:02:11 -08:00
meson.build meson: with_glx never assigned to 'gallium-xlib', so need add with_glx == 'xlib' for dep_glproto 2022-10-25 09:25:41 -07:00
meson_options.txt util: Add a Win32 futex impl 2022-07-15 21:31:51 +00:00

README.rst

`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://mesa3d.org/install.html>`_), but the recommended way is to use
Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_):

.. code-block:: sh

  $ mkdir build
  $ cd build
  $ meson ..
  $ sudo ninja 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://mesa3d.org/bugs.html>`_).


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

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

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