for 3D GPU workloads.
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
+v3.0B this would select one bit of the 32 bit CR,
+comprising eight CR Fields of 4 bits each. 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 Field (EQ LT GT SO), and the top 3 bits
are extended to either scalar or vector and to select CR Fields 0..127