Hitachi H8/300H Series Programming Manual page 28

Table 1-3 Instructions Classified by Function (cont)
Type Instruction
Arithmetic ADD
operations SUB
ADDX
SUBX
INC
DEC
ADDS
SUBS
DAA
DAS
MULXS
MULXU
DIVXS
Note: * Size refers to the operand size.
B: Byte
W: Word
L: Longword
Size* Function
Rd ± Rs → Rd, Rd ± #IMM → Rd
B/W/L
Performs addition or subtraction on data in two general
registers, or on immediate data and data in a general
register. (Immediate byte data cannot be subtracted
from data in a general register. Use the SUBX or ADD
instruction.)
Rd ± Rs ± C → Rd, Rd ± #IMM ± C → Rd
B
Performs addition or subtraction with carry or borrow
on byte data in two general registers, or on immediate
data and data in a general register.
Rd ± 1 → Rd, Rd ± 2 → Rd
B/W/L
Increments or decrements a general register by 1 or 2.
(Byte operands can be incremented or decremented by
1 only.)
Rd ± 1 → Rd, Rd ± 2 → Rd, Rd ± 4 → Rd
L
Adds or subtracts the value 1, 2, or 4 to or from data in
a 32-bit register.
Rd decimal adjust → Rd
B
Decimal-adjusts an addition or subtraction result in a
general register by referring to the CCR to produce
4-bit BCD data.
Rd × Rs → Rd
B/W
Performs signed multiplication on data in two general
registers: either 8 bits × 8 bits → 16 bits or 16 bits × 16
bits → 32 bits.
Rd × Rs → Rd
B/W
Performs unsigned multiplication on data in two general
registers: either 8 bits × 8 bits → 16 bits or 16 bits × 16
bits → 32 bits.
Rd ÷ Rs → Rd
B/W
Performs signed division on data in two general
registers: either 16 bits ÷ 8 bits → 8-bit quotient and
8-bit remainder or 32 bits ÷ 16 bits → 16-bit quotient
and 16-bit remainder.
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