13 lines
827 B
Plaintext
13 lines
827 B
Plaintext
SWI n ;software system call
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B label ;Branch. Just "B" is a branch always, but any condition code can be added for a conditional branch.
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;In fact, almost any instruction can be made conditional to avoid branching.
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BL label ;Branch and Link. This is the equivalent of the CALL command on the x86 or Z80.
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;The program counter is copied to the link register, then the operand of this command becomes the new program counter.
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BX Rn ;Branch and Exchange. The operand is a register. The program counter is swapped with the register specified.
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;BX LR is commonly used to return from a subroutine.
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addeq R0,R0,#1 ;almost any instruction can be made conditional. If the flag state doesn't match the condition code, the instruction
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;has no effect on registers or memory.
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