that can be structure-packed (LD/ST typically), REMAP may be applied to
literally any instruction: CRs, Arithmetic, Logical, LD/ST, anything.
-Note that REMAP does not apply to sub-vector elements: that is what
-swizzle is for. Swizzle *can* however be applied to the same instruction
-as REMAP.
+Note that REMAP does not *directly* apply to sub-vector elements: that
+is what swizzle is for. Swizzle *can* however be applied to the same
+instruction as REMAP. As explained in [[sv/mv.swizzle]], [[sv/mv.vec]] and the [[svp64/appendix]], Pack and Unpack EXTRA Mode bits
+can extend down into Sub-vector elements to perform vec2/vec3/vec4
+sequential reordering, but even here, REMAP is not extended down to
+the actual sub-vector elements themselves.
In its general form, REMAP is quite expensive to set up, and on some
implementations introduce