title: Random number with modulo ARM
body: <p>I'm coding a guess the number game in ARM to learn more about it.
  But i'm stuck at the random number generation...
  I call rand() but I don't know how to do the modulo 100 to generate a number in the range 0-100.
  I don't think there is modulo in ARM and "and r0, r0, #100" is not very random...</p>
  
  <p>Here is the start of the pseudo random number generation :</p>
  
  <pre><code>mov r0, #0
  bl time
  bl srand
  bl rand
  </code></pre>