Texas Instruments TMS320C28x Reference Manual page 348

Repeat
Example
; Swap the byte order in the 32-bit "Var32" location.
; Before operation:
; After operation:
MOVL
MOVB
MOVB
MOVB
MOVB
MOVL
This instruction is not repeatable. If this instruction follows the RPT
instruction, it resets the repeat counter (RPTC) and executes only once.
Var32 = B3 | B2 | B1 | B0
Var32 = B0 | B1 | B2 | B3
XAR2,#Var32
AL.LSB,*+XAR2[3]
AH.LSB,*+XAR2[1]
AL.MSB,*+XAR2[2]
AH.MSB,*+XAR2[0]
@Var32,ACC
; Load XAR2 with address of "Var32"
; ACC(B0) = Var32(B3), ACC(B1) = 0
; ACC(B2) = Var32(B1), ACC(B3) = 0
; ACC(B1) = Var32(B2), ACC(B1) = unch
; ACC(B3) = Var32(B0), ACC(B1) = unch
; Store swapped result in "Var32"
MOVB AX.LSB, loc16
6-191