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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
580d3e2f52
WMASK is used to lower subgroup ballot/ballot_relaxed operations. Unlike
ordinary ALU instructions, the result of WMASK depends not only on its
explicit source, but also on the implicit subgroup execution state, such
as the active lane mask.
Treating WMASK as a normal CSE-able instruction can collapse subgroup
predicate chains incorrectly. This may remove the producer of a predicate
SSA value while leaving later predicate-combine instructions still
referencing it. The invalid SSA source then reaches the Valhall packer
and fails with errors like:
Invalid type of source 2:
r2 = ICMP_AND.u32.eq.m1 r2^, r0, %23^
Fixed: dEQP-VK.subgroups.vote.graphics.subgroupallequal_ivec2
Signed-of-by: Ryan Zhang <ryan.zhang@nxp.com>
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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.