Alyssa Rosenzweig
2f2738dc90
OpenCL can generate large loads and stores that we can't support, so we need to lower. We can load/store up to 128-bits in a single go. We currently only handle up to 32-bit components in the load and no more than vec4, so we split up accordingly. It's not clear to me what the requirements are for alignment on Valhall, so we conservatively generate aligned access, at worst there's a performance penalty in those cases. I think unaligned access is suppoerted, but likely with a performance penalty of its own? So in the absence of hard data otherwise, let's just use natural alignment. Oddly, this shaves off a tiny bit of ALU in a few compute shaders on Valhall, all in gfxbench. Seems to just be noise from the RA lottery. total instructions in shared programs: 2686768 -> 2686756 (<.01%) instructions in affected programs: 584 -> 572 (-2.05%) helped: 6 HURT: 0 Instructions are helped. total cvt in shared programs: 14644.33 -> 14644.14 (<.01%) cvt in affected programs: 5.77 -> 5.58 (-3.25%) helped: 6 HURT: 0 total quadwords in shared programs: 1455320 -> 1455312 (<.01%) quadwords in affected programs: 56 -> 48 (-14.29%) helped: 1 HURT: 0 Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22228>
`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.