Renesas H8/300 Series Programming Manual page 40

The operand size is indicated by the letter B (byte) or W (word). The size is indicated
explicitly in this manual, but for instructions that permit only one size, the size designation can
be omitted in source-program coding.
The abbreviation EAs or EAd (effective address of source or destination) is used for operands
that permit more than one addressing mode.
Examples: Examples of the assembly-language coding of the instruction are given.
Operand size: Word or byte. Byte size is indicated for bit-manipulation instructions because
these instructions access a full byte in order to read or write one bit.
Condition code: The effect of instruction execution on the flag bits in the CCR is indicated.
The following notation is used:
Symbol Meaning
The flag is altered according to the result of the instruction.
0 The flag is cleared to "0."
— The flag is not changed.
* Undetermined; the flag is left in an unpredictable state.
Description: A detailed explanation is given of the action of the instruction.
Instruction Formats: Each possible format of the instruction is shown explicitly, indicating
the addressing mode, the object code, and the number of states required for execution when the
instruction and its operands are located in on-chip memory. The following symbols are used:
Symbol Meaning
Imm. Immediate data (3, 8, or 16 bits)
abs. An absolute address (8 bits or 16 bits)
disp. Displacement (8 bits or 16 bits)
r , r , r General register number (3 bits or 4 bits) The s, d, and n correspond to the letters
s d n
in the operand notation
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