Power ISA currently requires a large
number of instructions to get Floating Point constants into registers.
`fmvis` on its own is equivalent to BF16 to FP32/64 conversion,
-but if followed up by `frlsi` an additional 16 bits of accuracy in the
+but if followed up by `fishmv` an additional 16 bits of accuracy in the
mantissa may be achieved.
*IBM may consider it worthwhile to extend these two instructions to
-v3.1 Prefixed (`pfmvis` and `pfrlsi`). If so it is recommended that
-`pfmvis` load a full FP32 immediate and `pfrlsi` supplies the three high
+v3.1 Prefixed (`pfmvis` and `pfishmv`). If so it is recommended that
+`pfmvis` load a full FP32 immediate and `pfishmv` supplies the three high
missing exponent bits (numbered 8 to 10) and the lower additional
29 mantissa bits (23 to 51) needed to construct a full FP64 immediate.*