Hitachi H8/300L Series Programming Manual page 18

Table 1-3. Arithmetic Instructions
Instruction Size*
ADD B/W
SUB
ADDX B
SUBX
INC B
DEC
ADDS W
SUBS
DAA B
DAS
MULXU B
DIVXU B
CMP B/W
NEG B
* Size: Operand size
B: Byte
W: Word
12
Function
Rd ± Rs → Rd, Rd + #Imm → Rd
Performs addition or subtraction on data in two general registers, or
addition on immediate data and data in a general register.
Immediate data cannot be subtracted from data in a general
register.
Word data can be added or subtracted only when both words are in
general registers.
Rd ± Rs ± C → Rd, Rd ± #Imm ± C → Rd
Performs addition or subtraction with carry or borrow on byte data
in two general registers, or addition or subtraction on immediate
data and data in a general register.
Rd ± 1 → Rd
Increments or decrements a general register.
Rd ± 1 → Rd, Rd ± 2 → Rd
Adds or subtracts immediate data to or from data in a general
register. The immediate data must be 1 or 2.
Rd decimal adjust → Rd
Decimal-adjusts (adjusts to packed BCD) an addition or subtraction
result in a general register by referring to the condition code
register.
Rd × Rs → Rd
Performs 8-bit × 8-bit unsigned multiplication on data in two general
registers, providing a 16-bit result.
Rd ÷ Rs → Rd
Performs 16-bit ÷ 8-bit unsigned division on data in two general
registers, providing an 8-bit quotient and 8-bit remainder.
Rd - Rs, Rd-#Imm
Compares data in a general register with data in another general
register or with immediate data. Word data can be compared only
between two general registers.
0 - Rd → Rd
Obtains the two's complement (arithmetic complement) of data in a
general register.