Arithmetic Operations - Hitachi HD6473867 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
Notes: * Size: Operand size
B: Byte
W: Word
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 by 1.
Rd ± 1 → Rd, Rd ± 2 → Rd
Adds or subtracts 1 or 2 to or from a general register
Rd decimal adjust → Rd
Decimal-adjusts (adjusts to 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 indicates the result 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
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