Instruction Set Description
182
SLAU367P – October 2012 – Revised April 2020
Copyright © 2012–2020, Texas Instruments Incorporated
CPUX
4.6.2.22 INCD
* 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
Description
The destination operand is incremented by 2. 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 2.
INCD.B
0(SP)
; Byte on TOS is increment by 2