A 32-bit Prefix in front of a Defined Word that extends register
numbers (allows larger register files), adds single-bit predication,
element-width overrides, and optionally adds Saturation to Arithmetic
-instructions that normally would not have it. *SVP64 is in Draft only*
+instructions that normally would not have it. *SVP64Single is in Draft only*
and is yet to be defined.
**Definition of "UnVectoriseable":**