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These will let us make the SDWA optimizer much simpler than if we were to recognize combinations of shift/and/bfe. Signed-off-by: Rhys Perry <pendingchaos02@gmail.com> Reviewed-by: Timur Kristóf <timur.kristof@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3151>