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Jason Ekstrand c48f42e178 intel/fs: Emit HALT for discard on Gen4-5
Using HALT to immediately jump to the end of the shader is required to
implement GL_EXT_gpu_shader4 and OpenGL 3.0.  However, vanilla OpenGL
1.2 doesn't forbid it and it likely makes something somewhere faster.
We should be consistent and implement the same discard behavior on all
hardware if we can.

The rules for HALT on Gen4-5 are a bit different from Gen6+.  On the
older hardware, there is no stack for HALT; instead it's up to software
to save and restore mask registers.  However, there's no real saving
needed since we only use HALT to jump to the end of the program where
we're about about to do our FB writes.  All we need to do is reset AMask
to DMask, the value it was initialized to at the start of the thread.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5244>
2020-05-30 06:21:15 +00:00
.appveyor
.gitlab/issue_templates gitlab: Ask about reproduction rate in the issue template 2020-05-20 10:20:00 +00:00
.gitlab-ci ci: Rename x86_cross_arm_test to just arm_test. 2020-05-29 16:46:44 +00:00
bin tree-wide: fix deprecated GitLab URLs 2020-05-23 15:33:50 +00:00
build-support
docs radv/aco: enable VK_KHR_subgroup_extended_types on GFX8+ 2020-05-29 11:20:58 +00:00
doxygen
include EGL: sync headers with Khronos 2020-05-25 14:06:38 +00:00
scons scons/windows: Support build with LLVM 10. 2020-04-14 08:40:56 +00:00
src intel/fs: Emit HALT for discard on Gen4-5 2020-05-30 06:21:15 +00:00
subprojects meson: use github URL for wraps instead of completely unreliable wrapdb 2020-01-16 23:06:43 +00:00
.dir-locals.el
.editorconfig docs: fixup indentation 2020-01-18 11:39:32 +01:00
.gitignore
.gitlab-ci.yml ci: Rename x86_cross_arm_test to just arm_test. 2020-05-29 16:46:44 +00:00
.mailmap .mailmap: add an alias for Andres Gomez 2020-04-30 14:33:20 +03:00
.travis.yml
Android.common.mk tree-wide: fix deprecated GitLab URLs 2020-05-23 15:33:50 +00:00
Android.mk freedreno: android: fix build failure on android due to python version 2020-02-07 16:34:49 +00:00
appveyor.yml appveyor: Remove Meson job. 2020-04-01 01:13:21 +00:00
CleanSpec.mk
common.py
meson.build tree-wide: fix deprecated GitLab URLs 2020-05-23 15:33:50 +00:00
meson_options.txt gallium: change comments to remove 'state tracker' 2020-05-13 13:47:27 -04:00
README.rst
REVIEWERS
SConstruct tree-wide: fix deprecated GitLab URLs 2020-05-23 15:33:50 +00:00
VERSION cut 20.1 branch 2020-04-29 23:52:43 +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.html
<https://mesa3d.org/install.html>`_), but the recommended way is to use
Meson (`docs/meson.html <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.html <https://mesa3d.org/bugs.html>`_).


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

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

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