Mode is an augmentation of SV behaviour, providing additional
functionality. Some of these alterations are element-based (saturation),
-others involve post-analysis (predicate result) and others are
-Vector-based (mapreduce, fail-on-first).
+others are Vector-based (mapreduce, fail-on-first).
[[sv/ldst]], [[sv/cr_ops]] and [[sv/branches]] are covered separately:
the following Modes apply to Arithmetic and Logical SVP64 operations: