four aspects:
-1. instructions with only one source
+1. instructions with only one source (or dest)
2. RM Modes
3. is the loss of the dynamic meaning "VL=0" nop effect important?
4. why would "sv.op all-scalar" be inside a loop in the first place?
**REMAP**
A REMAP would redirect operations from the first nonmasked
-predicated element to the first **REMAPped** element.
+predicated element to the first **REMAPped** element, and combined
+with predication (single bit or otherwise) selection of a
+single element is achieved.
+
+biggest concern: how to achieve the same effect?
+
+answer: use at least one vector source.