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+# potential opcode allocations
+
+discussion on ways to allocate scalar and svp64 opcodes
+
+# major old/new scalar/vec
+
+following a similar scheme to EXT001 in Power ISA Public v3.1,
+one bit indicates "this is an entire new 32-bit scalar space"
+
+| 0-5 | 6 | 7 | 8-31 | Description               |
+|-----|---|---|------|---------------------------|
+| PO  | 0 | 0 | nnnn | new, scalar (SVP64Single) |
+| PO  | 1 | 0 | nnnn | old, scalar (SVP64Single) |
+| PO  | 0 | 1 | nnnn | new, vector (SVP64)       |
+| PO  | 1 | 1 | nnnn | old, vector (SVP64)       |
+