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The other source of the multiply will be interpreted as a uint32_t in an XOR instruction. Any source modifiers with either not be interpreted at all or will be misinterpreted due to the differing types. If the other operand of the multiplication has a source modifier, just emit an extra move to resolve the source modifiers. The negation source modifier problem is difficult to reproduce due to an algebraic optimization that changes (-a*b) to -(a*b). However, changes in MR !1359 push the negations back down. On Gen7+ it might be possible to do slightly better for an abs() source modifier by using BFI2 as a glorified copysign(). On Gen8+ it might be possible to do slightly better for a neg() source modifier by emitting (~a ^ b). There were no shader-db changes on any Intel platform, so I think we can deal with that problem when it arises. See also piglit!224. Fixes: |
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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.html <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.html <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 `Freenode's #dri-devel <irc://chat.freenode.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.html <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.html <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses email mailing-lists for patches submission, review and discussions.