Texas Instruments TMS320C2XX - Manual (Page 153)

Indirect Addressing Mode
6-17 Addressing Modes
6.3.6 Modifying Auxiliary Register Content
The LAR, ADRK, SBRK, and MAR instructions are specialized instructions for
changing the content of an auxiliary register (AR):
- The LAR instruction loads an AR.
- The ADRK instruction adds an immediate value to an AR; SBRK subtracts
an immediate value.
- The MAR instruction can increment or decrement an AR value by one or
by an index amount.
However, you are not limited to these four instructions. Auxiliary registers can
be modified by any instruction that supports indirect addressing operands. (In-
direct addressing can be used with all instructions except those that have im-
mediate operands or no operands.)