Datasheet

Instruction Set

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3.4.6.15 DADC

*DADC[.W] Add carry decimally to destination

*DADC.B Add carry decimally to destination

Syntax DADC dst or DADC.W src,dst

DADC.B dst

Operation dst + C → dst (decimally)

Emulation DADD #0,dst

DADD.B #0,dst

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

Status Bits N: Set if MSB is 1

Z: Set if dst is 0, reset otherwise

C: Set if destination increments from 9999 to 0000, reset otherwise

Set if destination increments from 99 to 00, reset otherwise

V: Undefined

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

Example The four-digit decimal number contained in R5 is added to an eight-digit decimal number

pointed to by R8.

CLRC ; Reset carry

; next instruction's start condition is defined

DADD R5,0(R8) ; Add LSDs + C

DADC 2(R8) ; Add carry to MSD

Example The two-digit decimal number contained in R5 is added to a four-digit decimal number

pointed to by R8.

CLRC ; Reset carry

; next instruction's start condition is defined

DADD.B R5,0(R8) ; Add LSDs + C

DADC.B 1(R8) ; Add carry to MSDs

CPU SLAU144J–December 2004–Revised July 2013

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