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HD6433802H Datasheet, PDF (46/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer | |||
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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
Rd ± Rs â Rd, Rd + #IMM â 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 â Rd, Rd ± #IMM ± C â 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 â Rd
Increments or decrements a general register by 1.
ADDS SUBS W
Rd ± 1 â Rd, Rd ± 2 â Rd
Adds or subtracts 1 or 2 to or from a general register
DAA DAS
B
Rd decimal adjust â 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 à Rs â Rd
Performs 8-bit à 8-bit unsigned multiplication on data in two
general registers, providing a 16-bit result
DIVXU
B
Rd ÷ Rs â 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 â Rs, Rd â #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 â Rd â Rd
Obtains the twoâs complement (arithmetic complement) of data in a
general register
Notes: * Size: Operand size
B: Byte
W: Word
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