and destination element offsets progress incrementally in
lock-step.
-Example VL=2, SUBVL=3, PACK_en=1
-
- 0 1 2
- srcstep=0 0 1 2
- srcstep=1 3 4 5
-
- 0 1
- dststep=0 0 1
- dststep=1 2 3
- dststep=2 4 5
-
+Example VL=2, SUBVL=3, PACK_en=1 - elements grouped by
+vec3 will be redistributed such that Sub-elements 0 are
+packed together, Sub-elements 1 are packed together, as
+are Sub-elements 2.
+
+ srcstep=0 srcstep=1
+ 0 1 2 3 4 5
+
+ dststep=0 dststep=1 dststep=2
+ 0 3 1 4 2 5
Setting of both `PACK_en` and `UNPACK_en` is neither prohibited nor
`UNDEFINED` because the reordering is fully deterministic, and