Ian Romanick c49d6e0480 nir/algebraic: Elide range clamping of f2u sources
There are no shader-db changes on ELK platforms because those platforms
don't support 8- or 16-bit integer types.

v2: Restrict patterns generated such that the integer limits are exactly
representable in the specified floating point format. With the exception
of the value 0, this requires that float_sz > int_sz. This had no impact
on shader-db or fossil-db on any Intel platform. Noticed by Georg.

v3: Add a missing is_a_number.

shader-db:

All Intel platforms had similar results. (Lunar Lake shown)
total cycles in shared programs: 889936056 -> 889934082 (<.01%)
cycles in affected programs: 65806 -> 63832 (-3.00%)
helped: 2 / HURT: 0

fossil-db:

Lunar Lake
Totals:
Instrs: 233284796 -> 233282917 (-0.00%); split: -0.00%, +0.00%
Cycle count: 32756399804 -> 32754972188 (-0.00%); split: -0.01%, +0.00%
Spill count: 519861 -> 519813 (-0.01%)
Fill count: 663650 -> 663626 (-0.00%); split: -0.01%, +0.01%
Max live registers: 71738626 -> 71738696 (+0.00%)
Non SSA regs after NIR: 67837902 -> 67837648 (-0.00%)

Totals from 1236 (0.16% of 790723) affected shaders:
Instrs: 2134504 -> 2132625 (-0.09%); split: -0.09%, +0.01%
Cycle count: 604922278 -> 603494662 (-0.24%); split: -0.48%, +0.25%
Spill count: 16509 -> 16461 (-0.29%)
Fill count: 32760 -> 32736 (-0.07%); split: -0.22%, +0.15%
Max live registers: 250112 -> 250182 (+0.03%)
Non SSA regs after NIR: 302368 -> 302114 (-0.08%)

Meteor Lake, DG2, and Tiger Lake had similar results. (Meteor Lake shown)
Totals:
Instrs: 264095370 -> 264094056 (-0.00%); split: -0.00%, +0.00%
Cycle count: 26554146277 -> 26553027268 (-0.00%); split: -0.01%, +0.01%
Spill count: 530603 -> 530615 (+0.00%)
Fill count: 613231 -> 613273 (+0.01%)
Max live registers: 46559041 -> 46559087 (+0.00%)

Totals from 1237 (0.14% of 905547) affected shaders:
Instrs: 2262517 -> 2261203 (-0.06%); split: -0.07%, +0.01%
Cycle count: 518219799 -> 517100790 (-0.22%); split: -0.59%, +0.37%
Spill count: 17518 -> 17530 (+0.07%)
Fill count: 32273 -> 32315 (+0.13%)
Max live registers: 128360 -> 128406 (+0.04%)

Ice Lake and Skylake had similar results. (Ice Lake shown)
Totals:
Instrs: 269849640 -> 269848198 (-0.00%); split: -0.00%, +0.00%
Cycle count: 26718329643 -> 26718289020 (-0.00%); split: -0.00%, +0.00%
Max live registers: 46878430 -> 46878462 (+0.00%)

Totals from 1233 (0.14% of 905427) affected shaders:
Instrs: 2324225 -> 2322783 (-0.06%); split: -0.06%, +0.00%
Cycle count: 531467501 -> 531426878 (-0.01%); split: -0.11%, +0.10%
Max live registers: 130782 -> 130814 (+0.02%)

Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37186>
2025-10-10 17:25:07 +00:00
2025-02-23 00:31:59 +01:00
2025-10-09 12:12:42 +00:00
2025-10-10 15:29:03 +00:00
2025-09-26 14:02:52 +00:00
2025-01-08 20:37:51 +00:00
2023-11-02 11:37:46 +00:00
2025-09-16 19:45:15 +00:00
2025-08-31 15:38:27 +00:00
2024-11-18 22:29:14 +00:00
2025-07-16 13:50:24 +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.
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