Beginning x64 Assembly Programming: From Novice to AVX Professional

© Jo Van Hoey 2019

J. Van HoeyBeginning x64 Assembly Programminghttps://doi.org/10.1007/978-1-4842-5076-1_9

9. Integer Arithmetic

Jo Van Hoey¹ 

(1)

Hamme, Belgium

 

In this chapter, you’ll see a number of arithmetic instructions for integers. Floating-point arithmetic will be covered in a later chapter. Now is a good time to quickly review Chapter 2 on binary numbers.

Starting with Integer Arithmetic

Listing 9-1 shows the example code we will analyze.

; icalc.asm

extern printf

section .data

      number1    dq    128   ; the numbers to be used to

      number2    dq    19    ; show the arithmetic

      neg_num    dq    -12   ; to show sign extension

      fmt        db    "The numbers are %ld and %ld",10,0

      fmtint     db    "%s %ld",10,0

      sumi  db   "The ...