arithmetic.nasm

global _start

section .text

_start:
	;register based addition

	mov rax, 0x01
	add rax, 0x01

	mov rax, 0xffffffffffffffff
	add rax, 0x01

	mov rax, 0x09
	sub rax, 0x04

	;memory based addition

	mov rax, qword [var1]
	add qword [var4], rax

	add qword [var4], 0x02

	;set / clear / complement carry flag

	clc
	stc
	cmc

	;add with carry

	mov rax, 0
	stc
	adc rax,0x1
	stc
	adc rax, 0x2

	;subtract with borrow

	mov rax, 0x10
	sub rax, 0x5
	stc
	sbb rax, 0x4

	;increment and decrement
	inc rax
	dec rax

	;exit the program

	mov rax, 0x3c
	mov rdi, 0
	syscall


section .data

var1  dq  0x1
var2  dq  0x1122334455667788
var3  dq  0xffffffffffffffff
var4  dq  0x0