Datasheet

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Instruction Set Description

4.6.3.10 DADCX

* DADCX.A Add carry decimally to destination address-word

* DADCX.[W] Add carry decimally to destination word

* DADCX.B Add carry decimally to destination byte

DADCX.A dst

Syntax

DADCX dst or DADCX.W dst

DADCX.B dst

Operation dst + C → dst (decimally)

DADDX.A #0,dst

Emulation

DADDX #0,dst

DADDX.B #0,dst

Description The carry bit (C) is added decimally to the destination.

Status Bits N: Set if MSB of result is 1 (address-word > 79999h, word > 7999h, byte > 79h), reset

if MSB is 0

Z: Set if result is zero, reset otherwise

C: Set if the BCD result is too large (address-word > 99999h, word > 9999h, byte >

99h), reset otherwise

V: Undefined

Mode Bits OSCOFF, CPUOFF, and GIE are not affected.

Example The 40-bit counter, pointed to by R12 and R13, is incremented decimally.

DADDX.A #1,0(R12) ; Increment lower 20 bits

DADCX.A 0(R13) ; Add carry to upper 20 bits

225

SLAU144J–December 2004–Revised July 2013 CPUX

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