Mesa3D Graphics Library (Bleeding edge ray tracing branches)
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Ian Romanick 71961c73a9 nir: Correctly constant fold fsign(NaN) and fsign(-0)
GLSL and SPIR-V GLSL.std.450 don't have any requirements for fsign(NaN),
and both only require that FSign(-0.0) == 0.0.  OpenCL, on the other
hand, requires sign(-0.0) be exactly -0.0.  It also requires that
sign(NaN) be exactly 0.0.

In practice, this change is difficult to test.  Our GLSL frontend
already constant folds sign(NaN) to 0.0 before even getting to NIR.  As
far as I can tell, glslang does the same.  I don't have a good way to
run an OpenCL SPIR-V test.  Maybe SPIR-V GLSL.std.450 assembly?

No shader-db or fossil-db changes on any Intel platform.

Acked-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6358>
2021-01-05 02:07:09 +00:00
.appveyor appveyor: Use Python3. 2020-08-06 09:46:48 +00:00
.gitlab/issue_templates gitlab: add RADV bug report template 2020-12-18 08:03:04 +00:00
.gitlab-ci CI: Install DirectX-Headers package for x86 container 2021-01-04 23:03:01 +00:00
bin mapi: Fix symbols check with ASan enabled. 2020-12-15 19:39:29 +00:00
build-support
docs gallium: remove PIPE_CAP_INFO_START_WITH_USER_INDICES and fix all drivers 2021-01-04 19:22:34 -05:00
doxygen
include dri: add image cleanup callback to loader extensions 2020-12-15 06:05:27 +00:00
scons util: Allow STATIC_ASSERT() everywhere 2020-12-10 16:48:36 +00:00
src nir: Correctly constant fold fsign(NaN) and fsign(-0) 2021-01-05 02:07:09 +00:00
subprojects d3d12: Use DirectX-Headers wrap for d3d12.h 2020-12-16 16:25:54 +00:00
.dir-locals.el
.editorconfig docs: fixup indentation 2020-01-18 11:39:32 +01:00
.gitignore intel/tools: Add unit tests for assembler 2019-05-07 14:33:48 -07:00
.gitlab-ci.yml CI: Enable d3d12 driver for Linux CI builds 2021-01-04 23:03:01 +00:00
.mailmap .mailmap: add and update aliases for Danylo Piliaiev 2020-12-04 15:08:30 +00:00
.travis.yml travis: autodetect python version instead of hard-coding it 2019-12-21 20:23:08 +00:00
Android.common.mk tree-wide: fix deprecated GitLab URLs 2020-05-23 15:33:50 +00:00
Android.mk ac/llvm: handle static/shared llvm init separately 2020-08-17 10:47:41 +00:00
CleanSpec.mk
README.rst README: update references to internal docs 2020-06-13 10:42:01 +00:00
REVIEWERS REVIEWERS: add VMware reviewers 2019-10-18 16:42:40 +00:00
SConstruct tree-wide: fix deprecated GitLab URLs 2020-05-23 15:33:50 +00:00
VERSION Bump version for 21.0 devel 2020-11-09 16:20:45 -08:00
appveyor.yml appveyor: Use Python3. 2020-08-06 09:46:48 +00:00
common.py scons: Print a deprecation warning about using scons on not windows 2019-10-24 18:33:50 +00:00
meson.build swrast: Remove the classic swrast DRI driver 2020-12-31 00:15:29 +00:00
meson_options.txt swrast: Remove the classic swrast DRI driver 2020-12-31 00:15:29 +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 `Freenode's #dri-devel
<irc://chat.freenode.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.