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Jay is a new SSA-based compiler for Intel GPUs. This is an early work-in-progress. It isn't ready to ship, but we'd like to move development in tree rather than rebasing the world every week. Please don't bother testing yet - we know the status and we're working on it! Jay's design is similar to other modern NIR backends, particularly ACO, NAK and AGX. It is fully SSA, deconstructing phis after RA. We use a Colombet register allocator similar to NAK, allowing us to handle Intel's complex register regioning restrictions in a straightforward way. Spilling logical registers is straightforward with Braun-Hack. Thanks to the SSA-based design, the entire backend is essentially linear time, regardless of register pressure, addressing brw's excessive compile time when especially spilling with brw. In this current early draft, we support a limited subset of all three APIs on Xe2. A lot works and a lot doesn't. The core compiler is there (spilling, scoreboarding, SIMD32, etc should more or less work), but there are details to fill in for both performance and correctness. We essentially pass conformance on OpenGL ES 3.0 and OpenCL 3.0, and we're busy iterating on Vulkan. Likewise, additional hardware support will come down the line. There's nothing fundamentally Xe2-specific here. I just have a Lunarlake laptop on my desk, Ken has a Battlemage card, and we had to pick _something_ as the first target. Co-authored-by: Kenneth Graunke <kenneth@whitecape.org> Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40835> |
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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://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 $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ 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.