in exactly the same way that ARM SVE predicated-move extends 3-operand
"overwrite" opcodes to full independent 3-in 1-out.
-# BMI (bitmanipulation) group.
+## BMI (bitmanipulation) group.
Whilst the [[sv/vector_ops]] instructions are only two in number, in
reality the `bmask` instruction has a Mode field allowing it to cover