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In the following cases: - lower 16 bits are extracted and the shift amount is 16 or more - lower 8 bits are extracted and the shift amount is 24 or more the undesireable upper bits are already shifted out, and therefore there is no need to add SDWA to the v_lshlrev instruction. Fossil DB stats on Sienna Cichlid with NGGC on: Totals from 58239 (45.27% of 128647) affected shaders: CodeSize: 153498624 -> 153265616 (-0.15%); split: -0.15%, +0.00% Instrs: 29636304 -> 29578064 (-0.20%); split: -0.20%, +0.00% Latency: 136931496 -> 136876379 (-0.04%); split: -0.04%, +0.00% InvThroughput: 21134367 -> 21078861 (-0.26%); split: -0.26%, +0.00% Copies: 2777550 -> 2777548 (-0.00%); split: -0.00%, +0.00% Signed-off-by: Timur Kristóf <timur.kristof@gmail.com> Reviewed-by: Daniel Schürmann <daniel@schuermann.dev> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13121>
`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.