| 16-bit mode | | 10-bit mode |
| 0 | 1 | 2 3 4 | | 567 | 8 9 a | b c d | e | f |
| BO2 | BI3 | | 000 | 0 BI | 0 BO | LK | M | bclr
- | BO2 | BI3 | | 000 | 0 BI | 1 BO | LK | M | bctar
+ | BO2 | BI3 | | 000 | 0 BI | 1 BO | LK | M | bctr
| N | offs2 | | 001 | offs | LK | M | b
16 bit mode:
| 0 1 2 3 | 4 | | 567 | 8 9 a | b c d e | f |
| 1 1 1 1 | 0 | | 000 | 1 00 | 0 RT | M | mtlr
| 1 1 1 1 | 0 | | 000 | 1 01 | 0 RT | M | mtctr
- | 1 1 1 1 | 0 | | 000 | 1 10 | 0 RT | M | mttar
| 1 1 1 1 | 0 | | 000 | 1 11 | 0 RT | M | mtcr
| 1 1 1 1 | 1 | | 000 | 1 00 | 0 RA | M | mflr
| 1 1 1 1 | 1 | | 000 | 1 01 | 0 RA | M | mfctr
- | 1 1 1 1 | 1 | | 000 | 1 10 | 0 RA | M | mftar
| 1 1 1 1 | 1 | | 000 | 1 11 | 0 RA | M | mfcr
### Unallocated
| 1 0 1 0 | | | 000 | 1 | 0 | M |
| 1 0 1 1 | | | 000 | 1 | 0 | M |
| 1 1 0 0 | | | 000 | 1 | 0 | M |
+ | 1 1 1 1 | 0 | | 000 | 1 10 | 0 | M |
+ | 1 1 1 1 | 1 | | 000 | 1 10 | 0 | M |