Mode is an augmentation of SV behaviour. Different types of
instructions have different needs, similar to Power ISA
v3.1 64 bit prefix 8LS and MTRR formats apply to different
-instruction types
+instruction types. Modes include Reduction, Iteration, arithmetic
+saturation, and Fail-First. More specific details in each
+section and in the [[svp64/appendix]]
* For condition register operations see [[sv/cr_ops]]
* For LD/ST Modes, see [[sv/ldst]].