| 19 | RT | RA | | XO[0:4] | XO[5:9] |Rc| XL-Form |
| 19 | RT | RA |imm | imm // vs ms | NNNNN |Rc| setvl |
-Note that imm spans 7 bits (16 to 22), and that bit 22 is reserved abd must be zero. Setting bit 22 causes an illegal exception.
+Note that imm spans 7 bits (16 to 22), and that bit 22 is reserved and must be zero. Setting bit 22 causes an illegal exception.
Note that VL and MVL start from **one** i.e. that an immediate value of zero will result in VL/MVL being set to 1. 0b111111 results in VL/MVL being set to 64. This is because setting VL/MVL to 1 results in "scalar identity" behaviour, where setting VL/MVL to 0 would result in all Vector operations becoming nop. If this is truly desired (nop behaviour) then setting VL and MVL to zero be done via the [[SV SPRs|sv/sprs]]