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The PS thread payload format has changed enough in Xe2 that it probably doesn't make sense to share code with gfx6. See BSpec page "PS Thread Payload for Normal Dispatch - 512 bit GRF" for the new format. Reviewed-by: Caio Oliveira <caio.oliveira@intel.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26606>