The `BI` field of Branch Conditional operations is five bits,
in scalar v3.0B this would select one bit of the 32 bit CR.
In SVP64 there are 16 32 bit CRs, containing 128 4-bit CR Fields.
-Therefore, the 2 LSBs of `BI` select the bit from the CR, and the
+Therefore, the 2 LSBs of `BI` select the bit from the CR Field, and the
top 3 bits are extended to either scalar or vector and to
select CR Fields 0..127 as specified
in SVP64 [[sv/svp64/appendix]]