Table 1-4. Arithmetic Instructions
Instruction Size*
Function
ADD
B/W
Rd ± Rs
→
Rd, Rd + #Imm
→
Rd
SUB
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.
ADDX
B
Rd ± Rs ± C
→
Rd, Rd ± #Imm ± C
→
Rd
SUBX
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.
INC
B
Rd ± 1
→
Rd
DEC
Increments or decrements a general register.
ADDS
W
Rd ± 1
→
Rd, Rd ± 2
→
Rd
SUBS
Adds or subtracts immediate data to or from data in a general
register. The immediate data must be 1 or 2.
DAA
B
Rd decimal adjust
→
Rd
DAS
Decimal-adjusts (adjusts to packed BCD) an addition or
subtraction result in a general register by referring to the CCR.
MULXU
B
Rd
×
Rs
→
Rd
Performs 8-bit
×
8-bit unsigned multiplication on data in two
general registers, providing a 16-bit result.
DIVXU
B
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.
CMP
B/W
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.
NEG
B
0 – Rd
→
Rd
Obtains the two’s complement (arithmetic complement) of data in
a general register.
*
Size: Operand size
B: Byte
W: Word
11
Summary of Contents for H8/300 Series
Page 2: ...H8 300 Programming Manual...
