* **0000** - all 24 bits bits 8-31 are zero (0x000000)
* **!zero** - bits 8-31 may be any value *other* than zero (0x000001-0xffffff)
* **nnnn** - bits 8-31 may be any value in the range 0x000000 to 0xffffff
-* **SVP64Single** - a (TBD) Encoding that is near-identical to SVP64
+* **SVP64Single** - a ([TBD](https://bugs.libre-soc.org/show_bug.cgi?id=905))
+ Encoding that is near-identical to SVP64
except that it is not a Vector Operation (equivalent to hard-coded VL=1
at all times). Predication is permitted, Element-width-overrides is
permitted, Saturation is permitted. SVP64Single is a **scalar** augmentation