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ff57c31696
Some new CTS tests have geometry shader looking like this :
void main()
{
gl_Position = gl_in[0].gl_Position;
EmitVertex();
EndPrimitive();
// <-- some storage buffer write
}
The generate shader has :
- a message to write the position
- a message to write to the storage buffer
- a final message to end the thread
This generates an empty EOT URB messages which is apparently not legal
(simulation complains, HW hangs) :
send(8) nullUD g126UD nullUD 0x04088007 0x00000000
urb MsgDesc: offset 0 SIMD8 write masked mlen 2 ex_mlen 0 rlen 0 { align1 1Q A@1 EOT };
Instead emit a write with actual data and the mask set at 0 to discard
the effect :
mov(8) g127<1>UD 0x00000000UD { align1 WE_all 1Q };
mov(8) g125<1>UD 0x00000000UD { align1 1Q };
send(8) nullUD g126UD g125UD 0x04088007 0x00000040
urb MsgDesc: offset 0 SIMD8 write masked mlen 2 ex_mlen 1 rlen 0 { align1 1Q A@1 EOT };
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38243>
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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.