title: Assembly: do MOV or DEC influence zero flag?
body: <p>In a disassembled code:</p>
  
  <pre><code>movsx eax,[address1]
  # a few fpu computations
  dec eax
  # so many fpu computations
  jz label2
  </code></pre>
  
  <p>If fpu computations do not influence zero flag, then we can assume that it is equal to:</p>
  
  <pre><code># a few fpu computations
  # so many fpu computations
  movsx eax,[address1]
  dec eax
  jz label2
  </code></pre>
  
  <p>Then, my question is that do <code>mov</code> or <code>dec</code> have any influence on zero flag?</p>