`svshape` has *limited applicability* due to being a 32-bit instruction.
The full capability of SVSHAPE SPRs may be accessed by directly writing
to SVSHAPE0-3 with `mtspr`. Circumstances include Matrices with dimensions
-larger than 32, and in-place Transpose. Potentially a future v3.1 Prefixed
-instruction, `psvshape`, may extend the capability here.
+larger than 32, and in-place Transpose. Potentially a future
+instruction may extend the capability here.
Programmer's Note: Parallel Reduction Mode is selected by setting `SVRM=7,SVyd=1`.
Prefix Sum Mode is selected by setting `SVRM=7,SVyd=3`: