14.常见汇编指令

Notes #滴水基础_汇编

MOV指令

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MOV r/m8,  r8
MOV r/m16, r16
MOV r/m32, r32
MOV r/m64, r64

MOV r8,  r/m8
MOV r16, r/m16
MOV r32, r/m32
MOV r64, r/m64

MOV r/m8,  imm8
MOV r/m16, imm16
MOV r/m32, imm32
MOV r/m64, imm32    ; 64 位模式下会符号扩展

MOV r8,  imm8
MOV r16, imm16
MOV r32, imm32
MOV r64, imm64
  • r8：8 位寄存器，例如 AL
  • r16：16 位寄存器，例如 AX
  • r32：32 位寄存器，例如 EAX
  • r64：64 位寄存器，例如 RAX
  • r/m8：8 位寄存器或内存
  • imm8：8 位立即数

ADD指令

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ADD r/m8,  r8
ADD r/m16, r16
ADD r/m32, r32
ADD r/m64, r64

ADD r8,  r/m8
ADD r16, r/m16
ADD r32, r/m32
ADD r64, r/m64

ADD r/m8,  imm8
ADD r/m16, imm16
ADD r/m32, imm32
ADD r/m64, imm32

SUB指令

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SUB r/m8,  r8
SUB r/m16, r16
SUB r/m32, r32
SUB r/m64, r64

SUB r8,  r/m8
SUB r16, r/m16
SUB r32, r/m32
SUB r64, r/m64

SUB r/m8,  imm8
SUB r/m16, imm16
SUB r/m32, imm32
SUB r/m64, imm32

AND指令

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AND r/m8,  r8
AND r/m16, r16
AND r/m32, r32
AND r/m64, r64

AND r8,  r/m8
AND r16, r/m16
AND r32, r/m32
AND r64, r/m64

AND r/m8,  imm8
AND r/m16, imm16
AND r/m32, imm32
AND r/m64, imm32

OR指令

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OR r/m8,  r8
OR r/m16, r16
OR r/m32, r32
OR r/m64, r64

OR r8,  r/m8
OR r16, r/m16
OR r32, r/m32
OR r64, r/m64

OR r/m8,  imm8
OR r/m16, imm16
OR r/m32, imm32
OR r/m64, imm32

XOR指令

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XOR r/m8,  r8
XOR r/m16, r16
XOR r/m32, r32
XOR r/m64, r64

XOR r8,  r/m8
XOR r16, r/m16
XOR r32, r/m32
XOR r64, r/m64

XOR r/m8,  imm8
XOR r/m16, imm16
XOR r/m32, imm32
XOR r/m64, imm32

NOT指令

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NOT r/m8
NOT r/m16
NOT r/m32
NOT r/m64

MOVS指令

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MOVS m8,  m8
MOVS m16, m16
MOVS m32, m32
MOVS m64, m64

MOVSB    ; 传送 1 字节
MOVSW    ; 传送 2 字节
MOVSD    ; 传送 4 字节
MOVSQ    ; 传送 8 字节

movsb    ; [rdi]  = [rsi]
movsw    ; [rdi]  = [rsi]
movsd    ; [rdi]  = [rsi]
movsq    ; [rdi]  = [rsi]
  • DF标志寄存器表示运行后rdi和rsi自加还是自减

STOS指令

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STOS m8
STOS m16
STOS m32
STOS m64

STOSB    ; AL  -> [RDI]
STOSW    ; AX  -> [RDI]
STOSD    ; EAX -> [RDI]
STOSQ    ; RAX -> [RDI]

stosb    ; byte  ptr [rdi] = AL
stosw    ; word  ptr [rdi] = AX
stosd    ; dword ptr [rdi] = EAX
stosq    ; qword ptr [rdi] = RAX

REP指令

  • 按照RCX中的值为执行次数
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REP MOVSB
REP MOVSW
REP MOVSD
REP MOVSQ

REP STOSB
REP STOSW
REP STOSD
REP STOSQ

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由 GuQing 撰写，采用 CC BY-NC 4.0 许可协议。