Compare unsigned lower than halfwords and branch
This instruction compares the unsigned halfword values in two registers, and conditionally branches to a label at a PC-relative offset if the second value is lower than the first. It provides a hint that this is not a subroutine call or return. This instruction does not affect the condition flags.
This is a pseudo-instruction of CBH<cc>. This means:
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | Rm | 1 | 1 | imm9 | Rt | ||||||||||||||||
| cc | H | ||||||||||||||||||||||||||||||
| <Wm> |
Is the 32-bit name of the second general-purpose source register, encoded in the "Rm" field. |
| <Wt> |
Is the 32-bit name of the general-purpose register to be tested, encoded in the "Rt" field. |
| <label> |
Is the program label to be conditionally branched to. Its offset from the address of this instruction, in the range -1024 to 1020, is encoded as "imm9" times 4. |
The description of CBH<cc> gives the operational pseudocode for this instruction.
Internal version only: aarchmrs v2024-12_rel, pseudocode v2024-12_rel ; Build timestamp: 2024-12-15T22:18
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