Datasheet

Instruction Set

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3.4.6 Instruction Set Details

3.4.6.1 ADC

*ADC[.W] Add carry to destination

*ADC.B Add carry to destination

Syntax ADC dst or ADC.W dst

ADC.B dst

Operation dst + C → dst

Emulation ADDC #0,dst

ADDC.B #0,dst

Description The carry bit (C) is added to the destination operand. The previous contents of the

destination are lost.

Status Bit N: Set if result is negative, reset if positive

Z: Set if result is zero, reset otherwise

C: Set if dst was incremented from 0FFFFh to 0000, reset otherwise

Set if dst was incremented from 0FFh to 00, reset otherwise

V: Set if an arithmetic overflow occurs, otherwise reset

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

Example The 16-bit counter pointed to by R13 is added to a 32-bit counter pointed to by R12.

ADD @R13,0(R12) ; Add LSDs

ADC 2(R12) ; Add carry to MSD

Example The 8-bit counter pointed to by R13 is added to a 16-bit counter pointed to by R12.

ADD.B @R13,0(R12) ; Add LSDs

ADC.B 1(R12) ; Add carry to MSD

CPU SLAU144J–December 2004–Revised July 2013

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