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Flow-control structures: Difference between revisions

Flow-control structures (view source)

Revision as of 01:47, 20 September 2021

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→‎{{header|ARM Assembly}}: clarification
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=={{header|ARM Assembly}}==
<lang ARM Assembly>SWI n ;software system call
B label ;Branch. Just "B" is a branch always, but any condition code can be added for a conditional branch.
;In fact, almost any instruction can be made conditional to avoid branching.
 
BL label ;Branch and Link. This is the equivalent of the CALL command on the x86 or Z80.
;The program counter is copied to the link register, then the operand of this command becomes the new program counter.
 
BX Rn ;Branch and Exchange. The operand is a register. The program counter is swapped with the register specified.
;BX LR is commonly used to return from a subroutine.</lang>
 
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