* vfirst - Vertical First mode. srcstep, dststep and substep
**do not advance** unless explicitly requested to do so with
pseudo-op svstep (a mode of setvl)
+* RMpst - REMAP persistence. REMAP will apply only to the following
+ instruction unless this bit is set, in which case REMAP "persists".
+ Reset (cleared) on use of the `setvl` instruction if used to
+ alter VL or MVL.
* hphint - Horizontal Parallelism Hint. In Vertical First Mode
hardware **MAY** perform up to this many elements in parallel
per instruction. Set to zero to indicate "no hint".