`RM-2P-2S` is for `stw` etc. and is Rsrc1 Rsrc2.
+## MVRM-2P-1S1D
+
+| Field Name | Field bits | Description |
+|------------|------------|----------------------------|
+| Rdest_EXTRA2 | `10:11` | extends Rdest (R\*\_EXTRA2 Encoding) |
+| Rsrc_EXTRA2 | `12:13` | extends Rsrc (R\*\_EXTRA2 Encoding) |
+| PACK_en | `14` | Enable pack |
+| UNPACK_en | `15` | Enable unpack |
+| MASK_SRC | `16:18` | Execution Mask for Source |
+
+for [[sv/mv.vec]], [[sv/mv.swizzle]] and also LD/ST (without index)
+
## RM-1P-2S1D
single-predicate, three registers (2 read, 1 write)