JCXZ             Jump If CX Register Zero            Flags: not altered
 
JCXZ short-label
 
          Jump Condition:  Jump if CX = 0
 
    JCXZ transfers control to short-label if the CX register is 0. The
    target of the jump must be within -128 to +127 bytes of the next
    instruction.
 
  --------------------------------------------------------------------------
   Operands                  Clocks   Transfers  Bytes   Example
   short-label              18 or 6       -        2     JCXZ COUNT_DONE
  --------------------------------------------------------------------------
 
       Note:          This instruction is commonly used at the beginning
                      of a loop to bypass the loop if the counter variable
                      (CX) is at 0.

Seealso:


 LOOP 
 LOOPE 
 LOOPZ 
 LOOPNZ 
 LOOPNE