**SVP64Single:{EXT000-063}** bit6=old bit7=scalar
-This encoding, identical to SVP64Single:{EXT200-263},
-introduces SVP64Single Augmentation of v3.0 Scalar word instructions.
-All meanings must be identical to EXT000 to EXT063, and is is likewise
+This encoding, identical to SVP64Single:{EXT248-263},
+introduces SVP64Single Augmentation of Scalar "defined words".
+All meanings must be identical to EXT000-063, and is is likewise
prohibited to add an instruction in this area without also adding
the exact same (non-Augmented) instruction in EXT000-063 with the
exact same Scalar word.
-PO2 is in the range 0b00000 to 0b11111 to represent EXT000-063 respectively.
-Augmenting EXT001 is prohibited.
+Bits 32-37 0b00000 to 0b11111 represent EXT000-063 respectively.
+Augmenting EXT001 or EXT009 is prohibited.
| 0-5 | 6 | 7 | 8-31 | 32-63 |
|--------|---|---|-------|---------|
This encoding is identical to **SVP64:{EXT200-263}** except it
is the Vectorisation of existing v3.0/3.1 Scalar-words, EXT000-063.
All the same rules apply with the addition that
-Vectorisation of EXT001 is prohibited.
+Vectorisation of EXT001 or EXT009 is prohibited.
| 0-5 | 6 | 7 | 8-31 | 32-63 |
|--------|---|---|-------|---------|
**SVP64Single:{EXT248-263}** bit6=new bit7=scalar
This encoding, which is effectively "implicit VL=1"
-and comprising (from bits 8-31)
+and comprising (from bits 8-31 being non-zero)
*at least some* form of Augmentation, it represents the opportunity
to Augment EXT248-263 with the SVP64Single capabilities.
Must be allocated under Scalar *and* SVP64 simultaneously.