Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 144)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 CPX Instruction

129

CPX

Definition

Compare using Extended Addressing.

Syntax

CPX dst, src

Operation

dst - src

Description

For this new eZ8 extended addressing instruction, the source operand is

compared to (subtracted from) the destination operand and the appropri

ate flags are set accordingly. The contents of both operands are unaf-

fected.

Flags

C Set if a borrow is required by bit 7; reset otherwise

Z Set if the result is zero; reset otherwise

S Set if the result is negative; reset otherwise

V Set if an arithmetic overflow occurs; reset otherwise

D Unaffected

H Unaffected

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