2) Add (W) - Hitachi H8/300H Series Programming Manual

2.2.1 (2) ADD (W)

ADD (ADD binary)
Operation
Rd + (EAs) → Rd
Assembly-Language Format
ADD.W <EAs>, Rd
Operand Size
Word
Description
This instruction adds the source operand to the contents of a 16-bit register Rd (destination
operand) and stores the result in the 16-bit register Rd.
Available Registers
Rd: R0 to R7, E0 to E7
Rs: R0 to R7, E0 to E7
Operand Format and Number of States Required for Execution
Addressing
Mnemonic
Mode
Immediate ADD.W
Register direct ADD.W
Notes
Condition Code
H: Set to 1 if there is a carry at bit 11;
N: Set to 1 if the result is negative; otherwise
Z: Set to 1 if the result is zero; otherwise
V: Set to 1 if an overflow occurs; otherwise
C: Set to 1 if there is a carry at bit 15;
Operands
1st byte
#xx:16, Rd 7 9
Rs, Rd 0 9
43
I UI H U
— — —
otherwise cleared to 0.
cleared to 0.
cleared to 0.
cleared to 0.
otherwise cleared to 0.
Instruction Format
2nd byte 3rd byte
1 rd IMM
rs rd
Add Binary
N Z V C
No. of
States
4th byte
4
2