Assembly instruction to branch to an absolute address

Jeremy Henderson

Other Parts Discussed in Thread: TMS570LS20216

I am using a TMS570LS20216 and am trying to write some assembly code to branch to an absolute address.

I have tried the following to branch to 0x2013C:

B #2013Ch

However this branch is relative and it just uses 0x2013C as an offset and adds it to the current Program Counter for the branch address.

Is there a way to branch to an absolute address?

over 11 years ago

0 KGreb over 11 years ago

TI__Mastermind 23000 points

Hi Jeremy,

The typical way to approach this problem is to load a register with the desired 32b absolute address and then use the register name as the argument for your branch instruction (BX or BLX, not B).

ARM has a very good blog posting here which may help: http://blogs.arm.com/software-enablement/652-branch-and-call-sequences-explained/

For more details on the instruction set, please refer to the ARM v7A/R architecture reference manual (DDI0406) which is available via ARM's website.

Regards,
Karl

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Assembly instruction to branch to an absolute address