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We're currently using 2 address formats for accessing descriptor buffers (regardless of whether EXT_descriptor_buffer is used). nir_address_format_64bit_global_32bit_offset is used with bindless shaders or nir_address_format_32bit_index_offset otherwise. When using nir_address_format_32bit_index_offset, the layout pass insert vec2(surface, offset) values in the shader to access the descriptor buffers. With surface being the binding table entry of the descriptor. The binding table is packed and might also contain render targets so there is no equality mapping between the binding table index and the descriptor set index. For example with we could have a binding table like this : - BT0 : render target 0 - BT1 : render target 1 - BT2 : descriptor buffer 0 - BT3 : descriptor buffer 4 In the next commit we will stop using a binding table entry to access descriptor buffers on Gfx12.5+ and we will need the descriptor set index access the descriptor data. So in this commit we introduce a remapping in NIR to do the descriptor set index to binding table entry mapping. The mapping table is a vec8 put at the beginning of the functions and the value from the vector is extracted when loading data from the descriptor buffer Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35160> |
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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.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 $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ 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.