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range of BL instruction in arm state
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range of BL instruction in arm state
BASIL BABY
over 10 years ago
range of BL instruction in arm state is + or - 32MB as per instruction set.how...........?
Top replies
Martin Weidmann
over 10 years ago
+1
verified
The ARM BL instruction has a 24-bit immediate for encoding the branch offset (see section A8.8.25 of the ARMv7-A/R Architecture Reference Manual). This would give you a range of 2^24 bytes, or +/-8MB...
BASIL BABY
over 10 years ago
+1
i dont understand.............?
Martin Weidmann
over 10 years ago
in reply to
BASIL BABY
+1
What the B/BL instructions do is branch (or jump) to a different address. At an instruction level the destination of the branch is encoded as an offset from the current address. So current destination...