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It's safe to do the math in 32 bits because they're all local workgroup calculations. We just need to do a conversion at the end. For a couple of intrinsics, we just turn them into 32-bit intrinsics and add a u2u64. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6280>