725 B
725 B
Stack push and pop
Document conventions
The push()
and pop()
instructions accept as
their argument a register set containing a subset, or possibly all, of
the general-purpose registers R0-R12 and the link register (lr or R14).
As with any Python set the order in which the registers are specified is
immaterial. Thus the in the following example the pop() instruction
would restore R1, R7 and R8 to their contents prior to the push():
- push({r1, r8, r7}) Save three registers on the stack.
- pop({r7, r1, r8}) Restore them
Stack operations
- push({regset}) Push a set of registers onto the stack
- pop({regset}) Restore a set of registers from the stack