a33cd3def2
On vulkan, truncating to S/U16 before converting is not valid, because
out-of-range conversions are specified to be correctly rounded. IEEE 754
requires that out-of-range values round to ±inf with RTNE and ±F16_MAX
with RTZ.
On gl, truncating is valid for U16->F16, because out-of-range int->float
conversions are undefined behavior. For S16->F16, it is not valid
because S16_MAX < F16_MAX, so some in-range values will be truncated as
well.
Instead, just handle S/U16->F16 as S/U16->F32->F16.
Fixes dEQP-VK.spirv_assembly.instruction.compute.convertstof.int32_to_float16_*
when shaderFloat16 is enabled in panvk.
Signed-off-by: Benjamin Lee <benjamin.lee@collabora.com>
Fixes: be74b84e6f ("pan/bi: Fill in some more conversions")
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Rebecca Mckeever <rebecca.mckeever@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33637>
`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.