x64 Assembly CheatSheet

1.0 Register

8 Bytes (64 Bit)	4 Bytes (32 Bit)	2 Bytes (16 Bit)	1 Byte (8 Bit)	Description
RAX	EAX	AX	AL	1st temporary register
RBX	EBX	BX	BL	callee-saved-register
RCX	ECX	CX	CL	4th argument register
RDX	EDX	DX	DL	3rd argument register
RSI	ESI	SI	SIL	2nd argument register
RDI	EDI	DI	DL	1st argument register
RBP	EDP	BP	BPL	callee-saved register, frame-pointer
RSP	ESP	SP	SPL	stack-pointer
RIP	EIP	-	-	instruction-pointer
R8	R8D	R8W	R8B	5th argument register
R9	R9D	R9W	R9B	6th argument register
R10	R10D	R10W	R10B	temporary register
R11	R11D	R11W	R11B	temporary register
R12-R15	R12D-R15D	R12W-R15W	R12B-R15B	callee-safe register

2.0 Instructions

2.1 Data Movement

Parameter

S = Source D = Destination

Instruction	Parameter	Description
mov	S, D	Move Source to Destination
push	S	Push Source onto Stack
pop	D	Pop top of Stack into Destination
cwtl		Convert word in %ax to doubleword in %eax
cltq		Convert doubleword in %eax to quadword in %rax
cqto		Convert quadword in %rax to octoword in %rdx:%rax

2.2 Arithmetic Operations

2.2.1 Unary Operations

Instruction	Parameter	Description
inc	D	Increment by 1
dec	D	Decrement by 1
neg	D	Arithmetic negotion
not	D	Bitwise complement

2.2.2 Binary Operations

Instruction	Parameter	Description
leaq	S, D	Load effective address of source into destination
add	S, D	Add source to destination
sub	S, D	Subtract source from destination
imul	S, D	Multiply destination by source
xor	S, D	Bitwise XOR destination by source
or	S, D	Bitwise OR destination by source
and	S, D	Bitwise AND destination by source

2.2.3 Shift Operations

Instruction	Parameter	Description
shl	k, D	Left shift destination by k bits
shr	k, D	Logical right shift destination by k bits
sal	k, D	Left shift destination by k bits
sar	k, D	Arithmetic right shift destination by k bits

2.2.4 Special Arithmetic Operations

Instruction	Parameter	Description
imulq	S	Signed full multiply of rax by source, result stored in rdx:rax
mulq	S	Unsigned full multiply of rax by S, result stored in rdx:rax
idivq	S	Signed divide rdx:rax by S, quotient stored in rax, remainder stored in rdx
divq	S	Unsigned divide rdx:rax, quotient stored in rax, remainder stored in rdx

2.3 Comparisons and Test Instructions

Instruction	Parameter	Description
cmp	$S_2$ , $S_1$	Set condition codes according to $S_1$ - $S_2$
test	$S_2$ , $S_1$	Set condition codes according to $S_1$ - $S_2$

2.4 Accessing Condition Codes

2.4.1 Conditional Set Instructions

Instruction	Parameter	Description	Condition Code
sete / setz	D	Set if equal/zero	ZF
setne / setnz	D	Set if not equal/nonzero	~ZF
sets	D	Set if negative	SF
setns	D	Set if nonnegatove	~SF
setg / setnle	D	Set if greater	~(SF^0f)&~ZF
setge / setnl	D	Set if greater or equal	~(SF^0F)
setl / setnge	D	Set if less	SF^0F
setle / setng	D	Set if less or equal	(SF^0F)|ZF
seta / setnbe	D	Set if above	~CF&~ZF
setae / setnb	D	Set if above or equal	~CF
setb / setnae	D	Set if below	CF
setbe / setna	D	Set if below or equal	CF|ZF

2.4.2 Conditional Jump Instructions

Instruction	Parameter	Description	Condition Code
jmp	Label / *Operand	Jump to Label / specified location
je / jz	Label	Jump if equal/zero	ZF
jne / jnz	Label	Jump if not equal/nonzero	~ZF
js	Label	Jump if negative	SF
jns	Label	Jump if notnegative	~SF
jg / jnle	Label	Jump if greater	~(SF^0f)&~ZF
jge / jnl	Label	Jump if greater or equal	~(SF^0F)
jl / jnge	Label	Jump if less	SF^0F
jle / jng	Label	Jump if less or equal	(SF^0F)|ZF
ja / jnbe	Label	Jump if above	~CF&~ZF
jae / jnb	Label	Jump if above or equal	~CF
jb / jnae	Label	Jump if below	CF
jbe / jna	Label	Jump if below or equal	CF|ZF

2.4.3 Conditional Move Instructions

Instruction	Parameter	Description	Condition Code
cmove / cmovz	S, D	Move if equal/zero	ZF
cmovne / cmovnz	S, D	Move if not equal/nonzero	~ZF
cmovs	S, D	Move if negative	SF
cmovns	S, D	Move if nonnegatove	~SF
cmovg / cmovnle	S, D	Move if greater	~(SF^0f)&~ZF
cmovge / cmovnl	S, D	Move if greater or equal	~(SF^0F)
cmovl / cmovnge	S, D	Move if less	SF^0F
cmovle / cmovng	S, D	Move if less or equal	(SF^0F)|ZF
cmova / cmovnbe	S, D	Move if above	~CF&~ZF
cmovae / cmovnb	S, D	Move if above or equal	~CF
cmovb / cmovnae	S, D	Move if below	CF
cmovbe / cmovna	S, D	Move if below or equal	CF|ZF

2.5 Procedure Call Instruction

Instruction	Parameter	Description
call	Label / *Operand	Push return address and jump to label / specified location
leave		Set rsp to rbp, then pop top of stack into rbp
ret		Pop return address from stack and jump there

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References

• Brown CS: x64 Cheat Sheet
• Microsoft Docs: x64-Architektur
• x64 CheatSheet Canvas.canvas

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