CRs are not stored in SPRs: they are registers in their own right.
Theregore context-switching the full set of CRs involves a Vectorised
-mfcr or mtcr, using VL=64, elwidth=8 to do so.
+mfcr or mtcr, using VL=64, elwidth=8 to do so. This is exactly as how scalar OpenPOWER context-switches CRs: it is just that there are now more of them.
The 64 SV CRs are arranged similarly to the way the 128 integer registers
are arranged. TODO a python program that auto-generates a CSV file