being allocated as EXT001 Prefixed, EXT000-063, or hypothetically in
EXT300-363.
-**example ILLEGAL:**
+**ILLEGAL: dual allocation**
-* 32bit fredmv EXT0nn 0x12345678 or
- 64bit scalar EXT2nn 0x240000000 0x12345678
-* vector fishmv 0x27nnnnnn 0x12345678
+| width | assembler | prefix? | suffix | description |
+|-------|-----------|--------------|-----------|---------------|
+| 32bit | fredmv | none | 0x12345678| scalar EXT0nn |
+| 64bit | ss.fredmv | 0x26!zero | 0x12345678| scalar SVP64Single:EXT0nn |
+| 64bit | sv.fishmv | 0x27nnnnnn | 0x12345678| vector SVP64:EXT0nn |
-the use of 0x12345678 for fredmv in scalar but fishmv in Vector is **not** okay.
+the use of 0x12345678 for fredmv in scalar but fishmv in Vector is
+illegal. the suffix in both 64-bit locations
+must be allocated to a Vectoriseable EXT000-063
+"Defined Word" (Public v3.1 Section 1.6.3 definition)
+or not at all.
**another illegal example:**
-* 32bit RESERVEDunallocated EXT0nn 0x12345678 or
- 64bit scalar EXT2nn 0x240000000 0x12345678
-* vector fishmv 0x27nnnnnn 0x12345678
+| width | assembler | prefix? | suffix | description |
+|-------|-----------|--------------|-----------|---------------|
+| 32bit | unallocated | none | 0x12345678| scalar EXT0nn |
+| 64bit | ss.fredmv | 0x26!zero | 0x12345678| scalar SVP64Single:EXT0nn |
+| 64bit | sv.fishmv | 0x27nnnnnn | 0x12345678| vector SVP64:EXT0nn |
+
+and:
-the fact that there does not exist a scalar variant *at all* is not okay.
+| width | assembler | prefix? | suffix | description |
+|-------|-----------|--------------|-----------|---------------|
+| 64bit | unallocated | 0x24000000 | 0x12345678| scalar EXT2nn |
+| 64bit | ss.fishmv | 0x24!zero | 0x12345678| scalar SVP64Single:EXT2nn |
+| 64bit | sv.fishmv | 0x26nnnnnn | 0x12345678| vector SVP64:EXT2nn |
+Both of these are illegal. The fact that there does not exist a
+scalar "Defined Word" (even for EXT200-263)
\newpage{}
# Use cases