Alyssa Rosenzweig 10759d1708 pan/mdg: Use special NIR ops for trig scaling
Otherwise the lowering is fundamentally unsound due to incorrect constant
folding, even though it worked by chance with the old pass ordering. We're about
to change slightly the way we handle fsin/fcos, which was enough to trigger this
unsoundness.

shader-db results are mostly a toss-up.

total instructions in shared programs: 1520675 -> 1520220 (-0.03%)
instructions in affected programs: 96841 -> 96386 (-0.47%)
helped: 397
HURT: 3
helped stats (abs) min: 1.0 max: 4.0 x̄: 1.15 x̃: 1
helped stats (rel) min: 0.22% max: 6.25% x̄: 1.15% x̃: 0.40%
HURT stats (abs)   min: 1.0 max: 1.0 x̄: 1.00 x̃: 1
HURT stats (rel)   min: 0.58% max: 2.08% x̄: 1.08% x̃: 0.58%
95% mean confidence interval for instructions value: -1.19 -1.08
95% mean confidence interval for instructions %-change: -1.26% -1.01%
Instructions are helped.

total bundles in shared programs: 650088 -> 649844 (-0.04%)
bundles in affected programs: 31132 -> 30888 (-0.78%)
helped: 229
HURT: 23
helped stats (abs) min: 1.0 max: 4.0 x̄: 1.21 x̃: 1
helped stats (rel) min: 0.49% max: 7.14% x̄: 1.28% x̃: 0.71%
HURT stats (abs)   min: 1.0 max: 3.0 x̄: 1.48 x̃: 1
HURT stats (rel)   min: 0.83% max: 8.33% x̄: 2.38% x̃: 1.85%
95% mean confidence interval for bundles value: -1.08 -0.86
95% mean confidence interval for bundles %-change: -1.15% -0.74%
Bundles are helped.

total quadwords in shared programs: 1137388 -> 1136767 (-0.05%)
quadwords in affected programs: 71826 -> 71205 (-0.86%)
helped: 367
HURT: 17
helped stats (abs) min: 1.0 max: 8.0 x̄: 1.80 x̃: 1
helped stats (rel) min: 0.31% max: 17.24% x̄: 2.27% x̃: 0.96%
HURT stats (abs)   min: 1.0 max: 6.0 x̄: 2.29 x̃: 2
HURT stats (rel)   min: 0.44% max: 11.11% x̄: 2.18% x̃: 1.47%
95% mean confidence interval for quadwords value: -1.76 -1.47
95% mean confidence interval for quadwords %-change: -2.36% -1.78%
Quadwords are helped.

total registers in shared programs: 90483 -> 90461 (-0.02%)
registers in affected programs: 890 -> 868 (-2.47%)
helped: 67
HURT: 44
helped stats (abs) min: 1.0 max: 1.0 x̄: 1.00 x̃: 1
helped stats (rel) min: 8.33% max: 25.00% x̄: 10.52% x̃: 9.09%
HURT stats (abs)   min: 1.0 max: 2.0 x̄: 1.02 x̃: 1
HURT stats (rel)   min: 9.09% max: 50.00% x̄: 31.15% x̃: 33.33%
95% mean confidence interval for registers value: -0.39 -0.01
95% mean confidence interval for registers %-change: 1.75% 10.25%
Inconclusive result (value mean confidence interval and %-change mean confidence interval disagree).

total threads in shared programs: 55694 -> 55685 (-0.02%)
threads in affected programs: 21 -> 12 (-42.86%)
helped: 1
HURT: 5
helped stats (abs) min: 1.0 max: 1.0 x̄: 1.00 x̃: 1
helped stats (rel) min: 100.00% max: 100.00% x̄: 100.00% x̃: 100.00%
HURT stats (abs)   min: 2.0 max: 2.0 x̄: 2.00 x̃: 2
HURT stats (rel)   min: 50.00% max: 50.00% x̄: 50.00% x̃: 50.00%
95% mean confidence interval for threads value: -2.79 -0.21
95% mean confidence interval for threads %-change: -89.26% 39.26%
Inconclusive result (%-change mean confidence interval includes 0).

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19350>
2023-01-16 22:20:43 +00:00
2022-11-22 19:04:13 +00:00
2022-10-20 22:52:06 +00:00
2022-01-19 15:17:17 +00:00
2022-11-21 23:09:30 +00:00
2023-01-14 18:15:48 +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://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.
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