![background image](http://html1.mh-extra.com/html/texas-instruments/tms320c28x/tms320c28x_reference-manual_1097071135.webp)
Indirect Addressing Modes
5-11
C28x Addressing Modes
AMODE
”loc16/loc32” Syntax
Description
X
*+XARn[AR0]
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.
Example(s):
MOVW DP,#Array1Ptr ; Point to Array1 Pointer location
MOVL XAR2,@Array1Ptr ; Load XAR2 with pointer to Array1
MOVB XAR0,#16 ; AR0 = 16, AR0H = 0
MOVB XAR1,#68 ; AR1 = 68, AR1H = 0
MOVL ACC,*+XAR2[AR0] ;; Swap contents of location Array1[16]
MOVL P,*+XAR2[AR1] ;; with the contents of location Array1[68]
MOVL *+XAR2[AR1],ACC ;;
MOVL *+XAR2[AR0],P ;;
AMODE
”loc16/loc32” Syntax
Description
X
*+XARn[AR1]
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.
Example(s):
MOVW DP,#Array1Ptr ; Point to Array1 Pointer location
MOVL XAR2,@Array1Ptr ; Load XAR2 with pointer to Array1
MOVB XAR0,#16 ; AR0 = 16, AR0H = 0
MOVB XAR1,#68 ; AR1 = 68, AR1H = 0
MOVL ACC,*+XAR2[AR0] ;; Swap contents of location Array1[16]
MOVL P,*+XAR2[AR1] ;; with the contents of location Array1[68]
MOVL *+XAR2[AR1],ACC ;;
MOVL *+XAR2[AR0],P ;;
AMODE
”loc16/loc32” Syntax
Description
X
*+XARn[3bit]
ARP = n
32bitDataAddr(31:0) = XARn + 3bit
Note:
The immediate value is treated as an unsigned 3-bit value.
Example(s):
MOVW DP,#Array1Ptr ; Point to Array1 Pointer location
MOVL XAR2,@Array1Ptr ; Load XAR2 with pointer to Array1
MOVL ACC,*+XAR2[2] ;; Swap contents of location Array1[2]
MOVL P,*+XAR2[5] ;; with the contents of location Array1[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.
Summary of Contents for TMS320C28x
Page 30: ...1 12...
Page 80: ...This page intentionally left blank 2 50 This page intentionally left blank...
Page 269: ...IN loc16 PA 6 112 MOV AL 0 AL 0 UOUT IORegC AL IOspace IORegC AL 10...
Page 308: ...MAXCUL P loc32 6 151 Saturate MOVL Var64 2 ACC Store result into Var64 MOVL Var64 P...
Page 509: ...SUBL ACC P PM 6 352 SUBL ACC P PM ACC S B 11 M X 4 MOVH Y ACC 5 Store Q15 result into Y...
Page 585: ...This page intentionally left blank 7 32 This page intentionally left blank...