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The values are small unsigned integers, so their signed representation will be the same -- the sign conversion is not needed. As a result the extra MOV can be elided by the optimizations. Fossil-db results for DG2 ``` Totals: Instrs: 151779000 -> 151761591 (-0.01%) Cycle count: 12743968649 -> 12742826024 (-0.01%); split: -0.01%, +0.00% Max live registers: 31834993 -> 31834996 (+0.00%) Totals from 17018 (2.70% of 631450) affected shaders: Instrs: 2381740 -> 2364331 (-0.73%) Cycle count: 76798588 -> 75655963 (-1.49%); split: -1.70%, +0.22% Max live registers: 378921 -> 378924 (+0.00%) ``` and TGL ``` Totals: Instrs: 149812033 -> 149794080 (-0.01%); split: -0.01%, +0.00% Cycle count: 11534727002 -> 11534929834 (+0.00%); split: -0.01%, +0.01% Spill count: 42510 -> 42511 (+0.00%); split: -0.00%, +0.01% Fill count: 75100 -> 75101 (+0.00%); split: -0.00%, +0.00% Max live registers: 31727318 -> 31727321 (+0.00%) Totals from 17421 (2.76% of 630458) affected shaders: Instrs: 3092614 -> 3074661 (-0.58%); split: -0.58%, +0.00% Cycle count: 286061417 -> 286264249 (+0.07%); split: -0.32%, +0.39% Spill count: 11538 -> 11539 (+0.01%); split: -0.02%, +0.03% Fill count: 21359 -> 21360 (+0.00%); split: -0.01%, +0.01% Max live registers: 418954 -> 418957 (+0.00%) ``` Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30508> |
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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://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.