Iago Toral Quiroga
152fc4fd28
We can produce slightly better code for these in the backend, so do that. For this we need to: 1. Fix our implementation of uadd_carry (which wasn't used) to return an integer instead of a boolean value. 2. Add an implementation of usub_borrow. Notice these are only used in Vulkan. In GL these instructions are always unconditionally lowered by the state tracker in GLSL IR so we never get to see them in the backend. Shader-db stats from a collection of Vulkan samples: total instructions in shared programs: 122351 -> 122345 (<.01%) instructions in affected programs: 196 -> 190 (-3.06%) helped: 2 HURT: 0 total uniforms in shared programs: 18670 -> 18672 (0.01%) uniforms in affected programs: 59 -> 61 (3.39%) helped: 0 HURT: 2 total max-temps in shared programs: 13145 -> 13147 (0.02%) max-temps in affected programs: 27 -> 29 (7.41%) helped: 0 HURT: 2 total inst-and-stalls in shared programs: 123052 -> 123046 (<.01%) inst-and-stalls in affected programs: 197 -> 191 (-3.05%) helped: 2 HURT: 0 Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17372>
`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.