HI/LO) are abstracted out to RISC-paradigm Prefixing, leaving just
absolute-diff-accumulate, min-max, average-add etc. as "basic primitives".
+The min/max set are under their own RFC, [[ls013]]. They are sufficent
+high priority: fmax requires an astounding 32 SFFS instructions.
+
## Twin-Butterfly FFT/DCT/DFT for DSP/HPC/AI/AV
The number of uses in Computer Science for DCT, NTT, FFT and DFT,
Realistically these high-value instructions should be proposed in EXT2xx
where their XO cost does not overwhelm EXT0xx.
-
## (f)mv.swizzle
[[sv/mv.swizzle]] is dicey. It is a 2-in 2-out operation whose value