
39
Type
Instruction
Size*
1
Function
Arithmetic
operations
ADD
SUB
B/W/L
Rd ± Rs
→ Rd, Rd ± #IMM → Rd
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
byte data in a general register. Use the SUBX or ADD
instruction.)
ADDX
SUBX
B
Rd ± Rs ± C
→ Rd, Rd ± #IMM ± C → Rd
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.
INC
DEC
B/W/L
Rd ± 1
→ Rd, Rd ± 2 → Rd
Increments or decrements a general register by 1 or 2.
(Byte operands can be incremented or decremented by
1 only.)
ADDS
SUBS
L
Rd ± 1
→ Rd, Rd ± 2 → Rd, Rd ± 4 → Rd
Adds or subtracts the value 1, 2, or 4 to or from data in a
32-bit register.
DAA
DAS
B
Rd decimal adjust
→ Rd
Decimal-adjusts an addition or subtraction result in a
general register by referring to the CCR to produce 4-bit
BCD data.
MULXU
B/W
Rd
× Rs → Rd
Performs unsigned multiplication on data in two general
registers: either 8 bits
× 8 bits → 16 bits or 16 bits ×
16 bits
→ 32 bits.
MULXS
B/W
Rd
× Rs → Rd
Performs signed multiplication on data in two general
registers: either 8 bits
× 8 bits → 16 bits or 16 bits ×
16 bits
→ 32 bits.
DIVXU
B/W
Rd ÷ Rs
→ Rd
Performs unsigned 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.
Note:
*1 Size refers to the operand size.
B:
Byte
W: Word
L:
Longword