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Right now this is done in the backend so move it up to NIR. Doing this in the backend is easier, as at that time we can have a better idea about when we hit the hardware limits of three different TMP sources, however moving this to NIR allows for some optimizations. Specifically, at this time if we decide we actually have to lower we still have the info if we have plain fcsel for which we can save the comparison and emit flrp only. During translation to TGSI all of fcsel, fcsel_gt, and fcsel_ge translate to CMP so at that point the comparison is always needed. Shader-db RV530: total instructions in shared programs: 126057 -> 125823 (-0.19%) instructions in affected programs: 11359 -> 11125 (-2.06%) helped: 68 HURT: 12 total temps in shared programs: 17043 -> 17023 (-0.12%) temps in affected programs: 459 -> 439 (-4.36%) helped: 32 HURT: 12 total cycles in shared programs: 191604 -> 191294 (-0.16%) cycles in affected programs: 11834 -> 11524 (-2.62%) helped: 68 HURT: 12 The hurt shaders are some GTK shaders where there is some bad interaction with nir_move_vec_src_uses_to_dest. This is known and might be improved later by thweking the pass more. Reviewed-by: Filip Gawin <filip.gawin@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26816>
`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.