Texas Instruments MSP430x1xx - Manual (Page 376)

Instruction Set Overview
B-26
Example R10 is decremented by 1
DEC R10 ; Decrement R10
; Move a block of 255 bytes from memory location starting with EDE to memory location starting with
;TONI. Tables should not overlap: start of destination address TONI must not be within the range EDE
; to EDE+0FEh
;
MOV #EDE,R6
MOV #255,R10
L$1 MOV.B @R6+,TONI–EDE–1(R6)
DEC R10
JNZ L$1
; Do not transfer tables using the routine above with the overlap shown in Figure B–4.
Figure B–4.Decrement Overlap
EDE
EDE+254
TONI
TONI+254
Example Memory byte at address LEO is decremented by one.
DEC.B LEO ; Decrement MEM(LEO)
; Move a block of 255 bytes from memory location starting with EDE to memory location starting with
; TONI. Tables should not overlap: start of destination address TONI must not be within the range EDE
; to EDE+0FEh
;
MOV #EDE,R6
MOV.B #255,LEO
L$1 MOV.B @R6+,TONI–EDE–1(R6)
DEC.B LEO
JNZ L$1