Connor Abbott
876c5396a7
On a650 and later, there is a "scalar ALU" capable of executing cat2 instructions, a subset of cat3 instructions (csel but *not* mad), and cat4 instructions. There is also another copy of the scalar ALU embedded in HLSQ, which is responsible for executing preambles with the "early preamble" bit set. The two new features are closely intertwined, because the scalar ALU makes it possible to make most preambles only use shared registers, letting us optimistically use shared registers and only fall back to normal preambles if we ran out of shared registers. But the scalar ALU is also generally useful for moving calculations of uniform values like loop indices to the scalar ALU to reduce normal register pressure and increase parallelism, because like SFU/EFU and texture units different waves can execute ALU and scalar ALU instructions in parallel. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22075>
`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.