Condition Code; Instruction Format - Hitachi H8/300H Series Programming Manual

2.1.3 Condition Code

The symbols used in the condition-code description are defined as follows.
Symbol Meaning
Changes according to the result of the instruction
*
Undetermined (no guaranteed value)
0 Always cleared to 0
– Not affected by execution of the instruction
∆
Varies depending on conditions; see the notes.

2.1.4 Instruction Format

The symbols used in the instruction format descriptions are listed below.
Symbol Meaning
IMM Immediate data (2, 3, 8, 16, or 32 bits)
abs Absolute address (8, 16, or 24 bits)
disp Displacement (8, 16, or 24 bits)
rs, rd, rn Register number (4 bits. The symbol rs corresponds to operand symbols such
as Rs. The symbol rd corresponds to operand symbols such as Rd. The symbol
rn corresponds to the operand symbol Rn.)
ers, erd, ern Register number (3 bits. The symbol ers corresponds to operand symbols such
as ERs. The symbol erd corresponds to operand symbols such as ERd and
@ERd. The symbol ern corresponds to the operand symbol ERn.)
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