{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"|"}]}
| AVR          | `reg_pair`     | `r3r2` .. `r25r24`, `X`, `Z`       | `r`                  |
| AVR          | `reg_upper`    | `r[16-25]`, `XH`, `XL`, `ZH`, `ZL` | `d`                  |
| AVR          | `reg_iw`       | `r25r24`, `X`, `Z`                 | `w`                  |