68fb3a601c
Implement parsing and encoding of special floating-point values for both 20-bit (f20) and 16-bit (f16) immediate formats: inf:f20 - Positive infinity (imm_val=0x7f800, imm_type=0) -inf:f20 - Negative infinity (imm_val=0xff800, imm_type=0) nan:f20 - Quiet NaN (imm_val=0x7fc00, imm_type=0) -nan:f20 - Negative NaN (imm_val=0xffc00, imm_type=0) inf:f16 - Positive infinity (imm_val=0x7c00, imm_type=3) -inf:f16 - Negative infinity (imm_val=0xfc00, imm_type=3) nan:f16 - Quiet NaN (imm_val=0x7fff, imm_type=3) -nan:f16 - Negative NaN (imm_val=0xffff, imm_type=3) The f20 format stores the upper 20 bits of an IEEE 754 single-precision float. The f16 format stores the 16-bit half-float value directly. This enables round-trip assembly of shaders containing these special values, which can appear in GPU command streams captured from the proprietary driver. Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com> Reviewed-by: @LingMan Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39016>
`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.