* **SVd** - SV REMAP x/y dim
* **rmm** - REMAP mask: sets remap mi0-2/mo0-1 and SVSHAPEs,
controlled by mm
-* **ew** - sets element width override
+* **ew** - sets element width override on RS
* **RS** - GPR RS<<2 to be used for Indexing
* **yx** - 2D reordering to be used if yx=1
* **mm** - mask mode. determines how `rmm` is interpreted.