{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"|"}]}
| CSKY         | `r[0-3]`      | `a[0-3]`  |
| M68k         | `a7`          | `sp`, `usp`, `ssp`, `isp` |
| CSKY         | `r[4-11]`     | `l[0-7]`  |