Motorola HC12 - page 129

Assembler Syntax

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MCUez HC12 Assembler User’s Manual

MOTOROLA Assembler Syntax 129

7.4.3 Operand Fields

The operand fields, when present, follow the operation field and are separated

by white space. When two or more operand subfields appear within a statement,

a comma must separate them.

The address mode notations in Table 7-2 are allowed in the operand field.

In Table 7-2:

• xysp stands for one of the index registers: X, Y, SP, PC, or PCR

• xys stands for one of the index registers: X, Y, or SP

• abd stands for one of the accumulators: A, B, or D

Table 7-2. Addressing Mode Notations

Addressing Mode Notation

Inherent No operands

Direct <8-bit address>

Extended <16-bit address>

Relative <PC relative, 8-bit offset> or

Immediate #<immediate 8-bit expression> or

#<immediate 16-bit expression>

Indexed, 5-bit offset <5-bit offset>, xysp

Indexed, pre-decrement <3-bit offset>, -xys

Indexed, pre-increment <3-bit offset>, +xys

Indexed, post-decrement <3-bit offset>, xys-

Indexed, post-increment <3-bit offset>, xys+

Indexed, accumulator offset abd, xysp

Indexed, 9-bit offset <9-bit offset>, xysp

Indexed, 16-bit offset <16-bit offset>, xysp

Indexed-Indirect, 16-bit offset [<16-bit offset>, xysp]

Indexed-Indirect, D accumulator offset [D, xysp]