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73e8fc3efb
This is known to produce bogus results for certain combinations of operands, so don't use it. See this issue for details: https://gitlab.freedesktop.org/mesa/mesa/-/issues/6555 With this change, the idiv lowering will produce mul_high instructions, so we need to instruct the compiler to lower those with the ALU lowering right after the idiv lowering by adding the lower_mul_high option (we only need to add this to V3D, since V3DV already had it set). This will cause injection of uadd_carry instructions, for which we have backend implementations that produce better code for us than the NIR lowering. total instructions in shared programs: 12457692 -> 12463625 (0.05%) instructions in affected programs: 23115 -> 29048 (25.67%) helped: 0 HURT: 111 total threads in shared programs: 416372 -> 416368 (<.01%) threads in affected programs: 8 -> 4 (-50.00%) helped: 0 HURT: 2 total uniforms in shared programs: 3704067 -> 3704589 (0.01%) uniforms in affected programs: 5804 -> 6326 (8.99%) helped: 2 HURT: 109 total max-temps in shared programs: 2147845 -> 2148088 (0.01%) max-temps in affected programs: 2456 -> 2699 (9.89%) helped: 6 HURT: 91 Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com> Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17871> |
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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.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.