instructions are required which perform Horizontal Cumulative
analysis of Vectorised Condition Register Fields, in order to
reduce the Vector of CR Fields down to one single yes or no
-decision that the Scalar Branch-Conditional can cope with.
+decision that a Scalar-only v3.0B Branch-Conditional could cope with.
Such instructions would be unavoidable, required, and costly
by comparison to a Vector-aware Branch.
Therefore, in order to be commercially competitive, `sv.bc` and