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In53bfcdeecf, we added load/store_scratch instructions which deviate a little bit from most memory load/store instructions in that we can't use the normal untyped read/write instructions which can read and write up to a vec4 at a time. Instead, we have to use the DWORD scattered read/write instructions which are scalar. To handle this, we added code to brw_nir_lower_mem_access_bit_sizes to cause them to be scalarized. However, one case was missing: the load-as-larger-vector case. In this case, we take small bit-sized constant-offset loads replace it with a 32-bit load and shuffle the result around as needed. For scratch, this case is much trickier to get right because it often emits vec2 or wider which we would then have to lower again. We did this for other load and store ops because, for lower bit-sizes we have to scalarize thanks to the byte scattered read/write instructions being scalar. However, for scratch we're not losing as much because we can't vectorize 32-bit loads and stores either. It's easier to just disallow it whenever we have to scalarize. Fixes:53bfcdeecf"intel/fs: Implement the new load/store_scratch..." Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6872>
`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 `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.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.