Texas Instruments TMS320C28x Reference Manual page 135

AMODE "loc16/loc32" Syntax
X
*+XARn[AR0]
Example(s):
MOVW DP,#Array1Ptr
MOVL XAR2,@Array1Ptr
MOVB XAR0,#16
MOVB XAR1,#68
MOVL ACC,*+XAR2[AR0]
MOVL P,*+XAR2[AR1]
MOVL *+XAR2[AR1],ACC
MOVL *+XAR2[AR0],P
AMODE "loc16/loc32" Syntax
X
*+XARn[AR1]
Example(s):
MOVW DP,#Array1Ptr
MOVL XAR2,@Array1Ptr ; Load XAR2 with pointer to Array1
MOVB XAR0,#16
MOVB XAR1,#68
MOVL ACC,*+XAR2[AR0] ;; Swap contents of location Array1[16]
MOVL P,*+XAR2[AR1]
MOVL *+XAR2[AR1],ACC ;;
MOVL *+XAR2[AR0],P
AMODE "loc16/loc32" Syntax
X
*+XARn[3bit]
Example(s):
MOVW DP,#Array1Ptr
MOVL XAR2,@Array1Ptr ; Load XAR2 with pointer to Array1
MOVL ACC,*+XAR2[2]
MOVL P,*+XAR2[5]
MOVL *+XAR2[5],ACC
MOVL *+XAR2[2],P
Note: The assembler also accepts "*XARn" as an addressing mode. This is the same encoding as the "*+XARn[0]" mode.
Description
ARP = n
32bitDataAddr(31:0) = XARn + AR0
Note: The lower 16-bits of XAR0 are added to the selected 32-bit register. Upper
16-bits of XAR0 are ignored. AR0 is treated as an unsigned 16-bit value.
Overflow into the upper 16-bits of XARn can occur.
; Point to Array1 Pointer location
; Load XAR2 with pointer to Array1
; AR0 = 16, AR0H = 0
; AR1 = 68, AR1H = 0
;; Swap contents of location Array1[16]
;; with the contents of location Array1[68]
;;
;;
Description
ARP = n
32bitDataAddr(31:0) = XARn + AR1
Note: The lower 16-bits of XAR0 are added to the selected 32-bit register. Upper
16-bits of XAR0 are ignored. AR0 is treated as an unsigned 16-bit value.
Overflow into the upper 16-bits of XARn can occur.
; Point to Array1 Pointer location
; AR0 = 16, AR0H = 0
; AR1 = 68, AR1H = 0
;; with the contents of location Array1[68]
;;
Description
ARP = n
32bitDataAddr(31:0) = XARn + 3bit
Note: The immediate value is treated as an unsigned 3-bit value.
; Point to Array1 Pointer location
;; Swap contents of location Array1[2]
;; with the contents of location Array1[5]
;;
;;
Indirect Addressing Modes
C28x Addressing Modes 5-11