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All of the affected shaders are in Mad Max. The inner part of the pattern is itself an open-coded sign(a). I tried using that as a pattern, but the results were not good. A bunch of shaders were helped for instructions, but overall cycles, spill, and fills were hurt. v2: Rebase on 1-bit Boolean changes. v3: Fix order of copysign() parameters in comments and commit message. Noticed by Matt. All Gen7+ platforms had similar results. (Skylake shown) total instructions in shared programs: 15282141 -> 15282073 (<.01%) instructions in affected programs: 6106 -> 6038 (-1.11%) helped: 17 HURT: 0 helped stats (abs) min: 4 max: 4 x̄: 4.00 x̃: 4 helped stats (rel) min: 1.02% max: 2.20% x̄: 1.15% x̃: 1.06% 95% mean confidence interval for instructions value: -4.00 -4.00 95% mean confidence interval for instructions %-change: -1.30% -1.00% Instructions are helped. total cycles in shared programs: 372597886 -> 372595954 (<.01%) cycles in affected programs: 32701 -> 30769 (-5.91%) helped: 17 HURT: 0 helped stats (abs) min: 6 max: 216 x̄: 113.65 x̃: 118 helped stats (rel) min: 0.40% max: 21.86% x̄: 6.20% x̃: 5.83% 95% mean confidence interval for cycles value: -152.84 -74.45 95% mean confidence interval for cycles %-change: -8.89% -3.51% Cycles are helped. No changes on any Gen6 or earlier platforms. Reviewed-by: Matt Turner <mattst88@gmail.com> |
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`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 email mailing-lists for patches submission, review and discussions.