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Ensure the following identities hold to match IEEE-754-2019 and upcoming NIR: min(-0, +0) = -0 min(+0, -0) = -0 max(-0, +0) = +0 max(+0, -0) = +0 To implement, we specialize a version of flt64_nonnan. The regular flt64 has extra logic to handle signed zero, so this version is actually simpler. So in addition to the bug fix, this is an optimization. Compute shaders from KHR-GL46.gpu_shader_fp64.builtin.max_dvec4 before and after: before: 136 inst, 122 alu, 122 fscib, 4 ic, 1006 bytes, 39 regs, 28 uniforms after: 104 inst, 90 alu, 90 fscib, 4 ic, 766 bytes, 39 regs, 28 uniforms I will happy take a 24% reduction in instruction count as the cost of standards conformance ^_^ Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30075>
`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 $ 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://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.