The same macro-op fusion may theoretically be deployed even on Scalar
operations.
+# dsld and dsrd
+
+**DRAFT**
+
+`dsld` and `dsrd` are is similar to v3.0 `sld`, and
+is Z23-Form in "overwrite" on RT.
+
+|0.....5|6..10|11..15|16..20|21.22|23..30|31|
+|-------|-----|------|------|-----|------|--|
+| EXT04 | RT | RA | RB | sm | XO |Rc|
+
+Both instructions take two 64-bit sources, concatenate
+them together then extract 64 bits from it, the offset
+location determined by a third source.
+
# maddedu
**DRAFT**