# alternative 32-64 encoding
```
-| 0-5 | 6-28 29 |30-31| 32 |33-37| 38-60 | 61-63 | Description |
-|-----|---------|-----|----|-----|-----------------------------------|
-| PO9 | xxx | 0 | 0 0 | 0 00000 xxxx 000 | SVP64:EXT900 |
-| PO9 | xxx | 0 | 0 0 | !zero xxxx !zero | 55-bit RESERVED |
-| PO9 | xxx | 1 | 0 0 | 32-bit EXT900 |
-| PO9 | !ZERO | 0 0 | 1 | DWi | SS:EXT232-263 |
-| PO9 | 0000 | 0 0 | 1 | DWi | Scalar EXT232-263 |
-| PO9 | nnnn | 1 0 | 1 | DWi | SVP64:EXT232-263 |
-| PO9 | 0000 | 0 1 | Defined Word-instruction | 32-bit Unvec in 64b|
-| PO9 | !ZERO | 0 1 | Defined Word-instruction | SS:EXT000-063 |
-| PO9 | nnnn | 1 1 | Defined Word-instruction | SVP64:EXT000-063 |
+|0-5| 6-27 28 29|30-31| 32 |33-37 | 38-59 | 60-63 | Description |
+|---|-----|-----|-----|----|--------|-----------------------------------|
+|PO9| rm0 | 0 0 | 0 0 | 0 000 rm1 xxxx 0000 | SVP64:EXT900 |
+|PO9| rm0 | 0 0 | 0 0 | 1 000 rm1 xxxx 0000 | SSingle:EXT900 |
+|PO9| xxx | x 0 | 0 0 | !zero xxxx !zero | 55-bit RESERVED |
+|PO9| xxx | x 0 | 0 0 | 32-bit EXT900 (Vectorizable) |
+|PO9| xxx | 1 1 | 0 0 | 32-bit EXT901 (Unvectorizable) |
+|PO9| !ZERO | 0 0 | 1 | DWi | SSingle:EXT232-263 |
+|PO9| 0000 | 0 0 | 1 | DWi | Scalar EXT232-263 |
+|PO9| nnnn | 1 0 | 1 | DWi | SVP64:EXT232-263 |
+|PO9| 0000 | 0 1 | Defined Word-instruction | 32-bit Unvec in 64b|
+|PO9| !ZERO | 0 1 | Defined Word-instruction | SSingle:EXT000-063 |
+|PO9| nnnn | 1 1 | Defined Word-instruction | SVP64:EXT000-063 |
```
+Fields:
+
+* `SVRM <- rm0 || rm1`
+
Length detection:
```