Texas Instruments MSP430x1xx manual Incd.B

Instruction Set

* INCD[.W]	Double-increment destination
* INCD.B	Double-increment destination
Syntax	INCD	dst or INCD.W	dst
	INCD.B	dst
Operation	dst + 2 −> dst
Emulation	ADD	#2,dst
Emulation	ADD.B	#2,dst
Example	The destination operand is incremented by two. The original contents are lost.
Status Bits	N: Set if result is negative, reset if positive
	Z: Set if dst contained 0FFFEh, reset otherwise
	Set if dst contained 0FEh, reset otherwise

C: Set if dst contained 0FFFEh or 0FFFFh, reset otherwise

Set if dst contained 0FEh or 0FFh, reset otherwise

V:Set if dst contained 07FFEh or 07FFFh, reset otherwise Set if dst contained 07Eh or 07Fh, reset otherwise

Mode Bits	OSCOFF, CPUOFF, and GIE are not affected.
Example	The item on the top of the stack (TOS) is removed without using a register.
	.......
	PUSH	R5	; R5 is the result of a calculation, which is stored
			; in the system stack
	INCD	SP	; Remove TOS by double-increment from stack
			; Do not use INCD.B, SP is a word-aligned
			; register
	RET
Example	The byte on the top of the stack is incremented by two.
	INCD.B	0(SP)	; Byte on TOS is increment by two

3-42 RISC 16−Bit CPU