4.4.2 Instruction Addressing Modes
The addressing modes shown in Table 4-3 form
the basis of the addressing modes optimized to support the specific features of
individual instructions. The addressing modes provided in the MAC class
of instructions differ from those in the other instruction types.
| Addressing Mode | Description |
|---|---|
| File Register Direct | The address of the file register is specified explicitly. |
| Register Direct | The contents of a register are accessed directly. |
| Register Indirect | The contents of Wn form the Effective Address (EA). |
| Register Indirect Post-Modified | The contents of Wn form the EA. Wn is post-modified (incremented or decremented) by a constant value. |
| Register Indirect Pre-Modified | Wn is pre-modified (incremented or decremented) by a signed constant value to form the EA. |
| Register Indirect with Register Offset (Register Indexed) | The sum of Wn and Wb forms the EA. |
| Register Indirect with Literal Offset | The sum of Wn and a literal forms the EA. |