a30bb25a7a
The current implementation was broken for any integers between 2^24 and 2^30 (it would return zero for me on ICL). The reason is that for such integers we wouldn't take the 'if (0 <= shiftCount)' early return path, however 'shiftCount + 7' would be positive, leading to a negative 'count' argument passed to __shift64RightJamming(), which would give undefined results. This reworks the affected conversion functions to use either __shortShift64Left() or __shift64RightJamming() based on the sign of the final shift count, which should avoid the problem. In addition this should qualify as a clean-up/optimization -- This implementation of the conversion functions translates to 7 instructions less than the original on Intel hardware. This fixes the 'KHR-GL46.shader_ballot_tests.ShaderBallotFunctionBallot' conformance tests on soft fp64 hardware with large enough subgroup size (>16). Fixes:d5cf6e92b4"glsl: Add built-in functions to do uint64_to_fp32(uint64_t)" Fixes:c9d333a6b7"glsl: Add built-in functions to do int64_to_fp32(int64_t)" Cc: Sagar Ghuge <sagar.ghuge@intel.com> Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
`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.html <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.html <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.html <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.html <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.