POPC

Restoring a control register

POPC

POP Control register

[Syntax]

POPC dest

 

[Operation]

tmp = *SP;

SP = SP + 4;

dest = tmp;

 

[Function]

-

This instruction restores data from the stack and transfers it to the control register specified as dest.

-

The stack pointer in use is specified by the U bit in the PSW.

-

In user mode, writing to the ISP, INTB, BPC, BPSW, and FINTV, and the IPL[3:0], PM, U, and I bits in the PSW is ignored. In supervisor mode, writing to the PM bit in the PSW is ignored.

 

[Instruction Format]

Syntax

Processng Size

dest

Code size

(Byte)

POPC dest

L

Rx

2

[Flag Change]

Flag

C

Z

S

O

Change

*

*

*

*

Note

* The flag changes only when dest is the PSW.

[Description Example]

POPC PSW


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