Zilog Z16F2810 Manual do Utilizador descarregar pdf (Página 152)

POPF Instruction UM018809-0611

136

ZNEO

CPU Core

User Manual

POPF

Definition

POP Flags

Syntax

POPF

Operation

FLAGS[7:0] 

+ 1(SP)

SP  SP

+ 2

Description

The POPF instruction increments the Stack Pointer (R15), loads the byte pointed to by the Stack

Pointer into the Flags register, and increments the Stack Pointer. POPF increments the Stack

Pointer twice so its alignment is not changed.

Flags

The Flags register is overwritten by the popped byte.

Syntax and Opcodes

Example

Before:

SP=FFFF_DB22H, FFFF_DB22H=00H, FFFF_DB23H=B1H (1011_0001B)

POPF ;Object Code: 0003

After:

SP=FFFF_DB24H, Flags=B1H (C, S, V, IRQE=1; Z, B=0)

Instruction, Operands Word 0 Word 1 Word 2

POPF 0003H

1 2 ... 147 148 149 150 151 152 153 154 155 156 157 ... 215 216

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