Timur Kristóf
2c40215ab9
When a shader has a comparison with the subgroup invocation id, we can use a constant instead, saving a VALU instruction. When the constant can't be represented as a 64-bit literal, use the s_bfm_b64 instruction to generate it instead, which is still a win. Fossil DB stats on GFX11: Totals from 300 (0.22% of 134913) affected shaders: CodeSize: 2223052 -> 2214336 (-0.39%); split: -0.43%, +0.04% Instrs: 430216 -> 429882 (-0.08%); split: -0.14%, +0.06% Latency: 5881180 -> 5878181 (-0.05%); split: -0.05%, +0.00% InvThroughput: 731846 -> 729293 (-0.35%) Copies: 31662 -> 31847 (+0.58%); split: -0.03%, +0.61% Branches: 8241 -> 8100 (-1.71%) PreVGPRs: 15788 -> 15786 (-0.01%) Signed-off-by: Timur Kristóf <timur.kristof@gmail.com> Reviewed-by: Georg Lehmann <dadschoorse@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20843>
`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.