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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
d764c03d5d
We'd like to postpone most int64 lowering until pretty late in the process, because e.g. turning iadd@64 into (unpack + add-low + add-high + compare + b2i32 + repack) sequences makes it difficult for many optimization passes to detect basic arithmetic patterns. In particular, nir_opt_load_store_vectorizer becomes unable to handle basic offset math on 64-bit addresses. We'd like to do double precision lowering earlier in the process, however. One snag is that nir_lower_int64's lower_2f and lower_f2 can produce operations that may need lowering by nir_lower_doubles(), so it's crucial to run those sets of lowering together. To handle this, we make a new entrypoint that does nir_lower_int64 but skips everything except float conversions. Note that the newly produced instructions will still be lowered according to the full set of int64 lowering options; this shouldn't be a huge deal. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23064> |
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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://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.