as literally a for-loop, sitting in between instruction decode and issue.
Higher performance systems may deploy SIMD backends, multi-issue and
out-of-order execution, although it is strongly recommended to add
-predication capability into all SIMD backend units.
+predication capability directly into SIMD backend units.
In OpenPOWER ISA v3.0B pseudo-code form, an ADD operation, assuming both
source and destination have been "tagged" as Vectors, is simply: