ARM Instruction Set: Branch Instructions

Assembler input:

B|BL <address>

Assembler output:

High byte as standard
Bottom three bytes are offset to address of branch (24-bit 2's-complement)

To obtain an address given an offset, use:

<branch address> = <instruction address> + 4 * <branch offset> + 8

where 4 is the word length and 8 is the pipelining correction.

To obtain an offset given an address, use:

<branch offset> = (<branch address> - <instruction address> - 8) / 4