This level is best suited to high-performance power-efficient but
specialist Compute workloads. 128 GPRs, FPRs and CR Fields are all
required, as is element-width overrides to allow data processing
-down to the 8-bit level.
+down to the 8-bit level. SUBVL support (Sub-Vector vec2/3/4) is also
+required.
All SVP64 Modes are required to be implemented in hardware: Saturation
in particular is a necessity for Audio DSP work. Reduction as well to