out of scope for this document [[openpower/sv/3d_vector_ops]]
* [[simple_v_extension/specification/bitmanip]] previous version,
contains pseudocode for sof, sif, sbf
+* https://en.m.wikipedia.org/wiki/X86_Bit_manipulation_instruction_set#TBM_(Trailing_Bit_Manipulation)
The core Power ISA was designed as scalar: SV provides a level of abstraction to add variable-length element-independent parallelism.
Therefore there are not that many cases where *actual* Vector