Alyssa Rosenzweig
0a13babdd8
By default, the "normal" output modifier is set on ALU ops. This is the correct default for float outputs -- for floats, it preserves the semantic value. Unfortunately, when used with integers, it does not preserve the bitstream encoding, causing misbehaviour. (It's an open question what happens when `normal` is used with integers -- does it apply some other transformation? or does it do floating point normalization/etc on the ints as if they were floats?). Instead, we default to the "clamp to integer" output modifier for ops writing integers. Semantically, this makes sense (clamping an integer to the nearest integer is the identity function). In the hardware with an integer opcode, this is the actual "normal". This fixes numerous sporadic and sometimes bizarre bugs relating to integers, especially integer moves. With this in place, we no longer care about the types involved; it's just bits on the wire again. Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
`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.