HD6433636SW datasheet(44/418 Pages) RENESAS

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2.5.2

Arithmetic Operations

Table 2.5 describes the arithmetic instructions.

Table 2.5

Arithmetic Instructions

Instruction

Size*

Function

ADD

SUB

B/W

± 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.

ADDX

SUBX

± 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.

INC

DEC

± 1 → Rd

Increments or decrements a general register

ADDS

SUBS

± 1 → Rd, Rd ± 2 → Rd

Adds or subtracts immediate data to or from data in a general

DAA

DAS

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

MULXU

× Rs → Rd

Performs 8-bit

× 8-bit unsigned multiplication on data in two general

registers, providing a 16-bit result

DIVXU

÷ 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

Word data can be compared only between two general registers.

NEG

0 – Rd

→ Rd

Obtains the two’s complement (arithmetic complement) of data in a

general register

Note: * Size: Operand size

B: Byte

W: Word

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