Data transfer instructions

There's a mov instruction, which copies a value from src to dest. This instruction has multiple forms, as we can see in this table:

Instruction	Structure	Description
mov	mov dest, src	dest = src
movsx/movzx	movsx/movzx dest , src	src is smaller than dest (src is 16-bits and dest is 32-bits) movzx: Sets the remaining bits in dest to zero movsx: Preserves the sign of the src value

Other instructions related to stack are like this:

Instruction	Structure	Description
push/pop	push/pop dest	Pushes the value to the top of the stack (esp = esp - 4)/ pulls the value out of the stack (esp = esp + 4)
pushad/popad	pushad/popad	Saves all registers to the stack/pulls out all registers from the stack (in x86 only)

For string manipulation, they are like this:

Instruction	Structure	Description
lodsb/lodsw/lodsd/lodsq	lodsb/lodsw/lodsd/lodsq	Loads a byte, 2 bytes, 4 bytes, or 8 bytes from the address rsi/esi...