Samsung S3F80JB POP Pop From Stack, POP dst Operation dst ← @SP, 00H Register 00H 55H, SP = 00FCH

Models: S3F80JB

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S3F80JBINSTRUCTION SET

POP — Pop From Stack

POP dst

Operation: dst @SP

SP SP + 1

The contents of the location addressed by the stack pointer are loaded into the destination. The stack pointer is then incremented by one.

Flags: No flags affected.

Format:

opc

dst

 

 

Bytes

Cycles

Opcode

Addr Mode

 

 

(Hex)

dst

2

8

50

R

 

8

51

IR

Examples: Given: Register 00H = 01H, register 01H = 1BH, SPH (0D8H) = 00H, SPL (0D9H) = 0FBH, and stack register 0FBH = 55H:

POP

00H

Register 00H

=

55H, SP = 00FCH

POP

@00H

Register 00H

=

01H, register 01H = 55H, SP = 00FCH

In the first example, general register 00H contains the value 01H. The statement "POP 00H" loads the contents of location 00FBH (55H) into destination register 00H and then increments the stack pointer by one. Register 00H then contains the value 55H and the SP points to location 00FCH.

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Page 191
Image 191
Samsung S3F80JB manual POP Pop From Stack, POP dst Operation dst ← @SP, 00H Register 00H 55H, SP = 00FCH