<https://azeria-labs.com/memory-instructions-load-and-store-part-4/>
+The LD/ST-Immediate-Post-Increment instructions are all Primary
+Opcode: there are 13 of these. LD/ST-Indexed-Post-Increment
+are all effectively 9-bit XO and consequently may easily
+fit into one single Primary Opcode. EXT2xx is recommended.
+
+One alternative idea is that bit 31 could be allocated (retrospectively)
+to Post-Increment. Although it may be too late for Scalar Power ISA
+it **may** be possible to consider for SVP64Single and/or SVP64-Vector
+
+
```
# LD/ST-Postincrement
stwupx, ls011, high, 10, yes, EXT2xx, no, isa/pifixedstore, 3R1W
stdup, ls011, high, PO, yes, EXT2xx, no, isa/pifixedstore, 2R1W
stdupx, ls011, high, 10, yes, EXT2xx, no, isa/pifixedstore, 3R1W
+
# FP LD/ST-Postincrement
lfdu, ls011, high, PO, yes, EXT2xx, no, isa/pifixedload, 1R2W
lfsu, ls011, high, PO, yes, EXT2xx, no, isa/pifixedload, 1R2W
stfsu, ls011, high, PO, yes, EXT2xx, no, isa/pifixedstore, 2R1W
stfdux, ls011, high, 10, yes, EXT2xx, no, isa/pifixedstore, 3R1W
stfsux, ls011, high, 10, yes, EXT2xx, no, isa/pifixedstore, 3R1W
+
+# LD/ST-Shifted-Postincrement
+lbzuspx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+lhzuspx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+lhauspx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+lwzuspx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+lwauspx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+lduspx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+stbuspx, ls011, med, 10, yes, EXT2xx, no, ls011, 3R1W
+sthuspx, ls011, med, 10, yes, EXT2xx, no, ls011, 3R1W
+stwuspx, ls011, med, 10, yes, EXT2xx, no, ls011, 3R1W
+stduspx, ls011, med, 10, yes, EXT2xx, no, ls011, 3R1W
+
+# FP LD/ST-Shifted-Postincrement
+lfdupsx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+lsdupsx, ls011, med, 10, yes, EXT2xx, no, ls011, 2R2W
+stfdupsx, ls011, med, 10, yes, EXT2xx, no, ls011, 3R1W
+stfsupsx, ls011, med, 10, yes, EXT2xx, no, ls011, 3R1W
+
```
# Example