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ARM 아키텍처는 다양한 명령어를 제공하여 다양한 응용 분야에서 사용된다. 이 글에서는 주요 ARM 명령어를 요약해 본다.

ARM Instruction Format

Arm Instruction set 포맷은 아래와 같다.

ARM Instruction Summary

Branch 명령어

Mnemonic	Instruction	Action
B	Branch	R15(PC) := address
BL	Branch w/ Link	R14(LR) := R15, R15(PC) := address
BX	Branch and Exchange	R15 := Rn, T bit := Rn[0]

Data Processing 명령어

Mnemonic	Instruction	Action
AND	AND	Rd := Rn AND Op2
EOR	Exclusive OR	Rd := (Rn AND NOT Op2) OR (Op2 AND NOT Rn)
SUB	Subtract	Rd := Rn – Op2
ADD	Add	Rd := Rn + Op2
ADC	Add w/ carry	Rd := Rn + Op2 + Carry
SBC	Subtract w/ Carry	Rd := Rn – Op2 – 1 + Carry
RSC	Reverse Subtract with Carry	Rd := Op2 – Rn – 1 + Carry
TST	Test bits	CPSR flags := Rn AND Op2
TEQ	Test bitwise equality	CPSR flags := Rn EOR Op2
CMP	Compare	CPSR flags := Rn – Op2
CMN	Compare Negative	CPSR flags := Rn + Op2
ORR	OR	Rd := Rn OR Op2
MOV	Move register or constant	Rd : = Op2
BIC	Bit Clear	Rd := Rn AND NOT Op2
MVN	Move negative register	Rd := 0xFFFFFFFF EOR Op2

PSR Transfer 명령어

Mnemonic	Instruction	Action
MRS	Move PSR status/flags to register	Rn := PSR
MSR	Move register to PSR status/flags	PSR := Rm

Multiply 명령어

Mnemonic	Instruction	Action
MUL	Multiply	Rd := Rm * Rs
MLA	Multiply Accumulate	Rd := (Rm * Rs) + Rn

Single Data Transfer 명령어

Mnemonic	Instruction	Action
LDR	Load register from memory	Rd := (address)
STR	Store register to memory	<address> := Rd

Block Data Transfer (LDM, STM)

Mnemonic	Instruction	Action
LDM	Load multiple registers	Stack manipulation (Pop)
STM	Store Multiple	Stack manipulation (Push)

Single Data Swap 명령어

Mnemonic	Instruction	Action
SWP	Swap register with memory	Rd := [Rn], [Rn] := Rm

Software Interrupt 명령어

Mnemonic	Instruction	Action
SWI	Software Interrupt	OS call

Coprocessor Register Transfers 명령어

Mnemonic	Instruction	Action
MRC	Move from coprocessor register to CPU register	Rn := cRn {cRm}
MCR	Move CPU register to coprocessor register	cRn := rRn {cRm}

참고

• https://iitd-plos.github.io/col718/ref/arm-instructionset.pdf
• https://slideplayer.com/slide/16136480/