Condition Register Fields are only 4 bits wide: this presents some
interesting conceptual challenges for SVP64, particularly with respect to element
-width (which is clearly meaningless). Likewise, arithmetic saturation
+width (which is clearly meaningless for a 4-bit
+collation of Conditions, EQ LT GE SO). Likewise, arithmetic saturation
(an important part of Arithmetic SVP64)
has no meaning. Additionally, extra modes are required that only make
sense for Vectorised CR Operations. Consequently an alternative Mode Format is required.