| EXTRA2_MODE | `18` | used by `msubed` and `madded` for RS |
When `EXTRA2_MODE` is set to zero, the implicit RS register takes
-its Vector/Scalar setting from Rdest_EXTRA2, but all numbering
+its Vector/Scalar setting from Rdest_EXTRA2, and takes
+the register number from RT, but all numbering
is offset by VL. *Note that element-width overrides influence this
offset* (see SVP64 [[svp64/appendix]] for full details).