Online HelpPC 2.10      Quick Reference Utility     Copyright 1991 David Jurgens

 
                 JCXZ/JECXZ - Jump if Register (E)CX is Zero                 
                                                                                
                                                                                
        Usage:  JCXZ    label                                                   
                JECXZ   label  (386+ only)                                      
        Modifies flags: None                                                    
                                                                                
                                                                                
        Causes execution to branch to "label" if register CX is zero.  Uses     
        unsigned comparision.                                                   
                                                                                
                                 Clocks                 Size                    
        Operands         808x  286   386   486          Bytes                   
                                                                                
        label:  jump      18   8+m   9+m    8             2                     
                no jump    6    4     5     5                                   
                                                                                
                                                                                
        - see Instruction Timing                                                
                                                                                
                                                                                
 

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