Loops and branches: labels, FLAGS and conditional jumps

The same loop written two ways. Keep an eye on the flags register: every arithmetic instruction leaves a "fingerprint" in it, and a conditional jump reads it to decide — jump or not.

r0q
?
FLAGS:untouched
assembly

          

          

            
C equivalent

            

          

        

        

        

          
          
          
          
        

      

    

  


  

    
Jump mnemonics — click the rows

    

      

        
MnemonicJump if…FLAGS

        
      

    

    
Click a mnemonic — I'll explain when it fires and what it is usually paired with.