Section 2 CPU
Rev. 7.00 Mar 10, 2005 page 42 of 652
REJ09B0042-0700
2.5.2 Arithmetic Operations
Table 2.5 describes the arithmetic instructions.
Table 2.5 Arithmetic Instructions
Instruction Size
*
Function
ADD
SUB
B/W 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.
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 addition or subtraction on immediate
data and data in a general register.
INC
DEC
B Rd ± 1 → Rd
Increments or decrements a general register by 1.
ADDS
SUBS
W Rd ± 1 → Rd, Rd ± 2 → Rd
Adds or subtracts 1 or 2 to or from a general register
DAA
DAS
B 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
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, and indicates the result in the
CCR. 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
Notes: * Size: Operand size
B: Byte
W: Word
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