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This is required by code-gen since it generates a 1-wide OR and it'll blow up if the register width > 1. It's also way better than the "your register is the wrong size" assert you get from the more generic validation check. Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21094>