Arithmetic Operations - Hitachi H8/3637 Hardware Manual

2.5.2

Arithmetic Operations

Table 2.5 describes the arithmetic instructions.
Table 2.5 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
Note: * Size: Operand size
B: Byte
W: Word
30
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 4-bit BCD) an addition or
subtraction result in a general register by referring to the CCR
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, and the result is stored in the CCR.
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