8a84e77b15
Add basic KHR_8bit_storage support for Adreno 750 devices, for now enabling the storageBuffer8BitAccess feature. A separate descriptor is provided for 8-bit storage access. The descriptor index is adjusted appropriately for 8-bit SSBO loads and stores. The 8-bit SSBO loads cannot go through isam since that instruction isn't able to handle those. The ldib and stib instruction encodings are a bit peculiar but they match the blob's image buffer access through VK_FORMAT_R8 and the dedicated descriptor. These loads and stores do not work in vectorized form, so they have to be scalarized. Additionally stores of 8-bit values have to clear up higher bits of those values. 8-bit truncation can leave higher bits as undefined. Zero-extension of 8-bit values has to use masking since the corresponding cov instruction doesn't function as intended. 8-bit sign extension through cov from a non-shared to a shared register also doesn't work, so an exception is applied to avoid it. Conversion of 8-bit values to and from floating-point values also doesn't work with a straightforward cov instruction, instead the conversion has to go through a 16-bit value. Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9979 Signed-off-by: Zan Dobersek <zdobersek@igalia.com> Reviewed-by: Connor Abbott <cwabbott0@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28254>
`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 $ 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://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.