Vectorisation of Load and Store requires creation, from scalar operations,
a number of different modes:
-* fixed aka "unit" stride (contiguous sequence with no gaps)
-* element strided (sequential but regularly offset, with gaps)
-* vector indexed (vector of base addresses and vector of offsets)
-* Speculative fail-first (where it makes sense to do so)
-* Structure Packing (covered in SV by [[sv/remap]]).
+* **fixed aka "unit" stride** - contiguous sequence with no gaps
+* **element strided** - sequential but regularly offset, with gaps
+* **vector indexed** - vector of base addresses and vector of offsets
+* **Speculative fail-first** - where it makes sense to do so
+* **Structure Packing** - covered in SV by [[sv/remap]] and Pack/Unpack Mode.
Also included in SVP64 LD/ST is both signed and unsigned Saturation,
as well as Element-width overrides and Twin-Predication.