S3CB205 Datasheet, PDF (80/98 Pages) Samsung semiconductor – S3CB205/FB205


 



 


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Format:
POP <op>
<op>: GPR, SPR
Operation:



Flags:


Example:





<op> ← HS[sptr - 1], sptr ← sptr - 1
POP copies the value on top of the stack to <op> and decrease sptr by 1.
Z: set if the value copied to <op> is zero. Reset if not.
N: set if the value copied to <op> is negative. Reset if not.
When <op> is SPR, no flags are affected, including Z and N.


POP
R0
// R0 ← HS[sptr-1], sptr ← sptr-1
POP
IDH
// IDH ← HS[sptr-1], sptr ← sptr-1
In the first instruction, value of HS[sptr-1] is loaded to R0 and the second instruction “POP IDH” load
value of HS[sptr-1] to register IDH. Refer to chapter 5 for more detailed explanation about POP
operations for hardware stack.