HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

               CMPS - Compare String (Byte, Word or Doubleword)

       Usage:  CMPS    dest,src
               CMPSD   (386+ only)
       Modifies flags: AF CF OF PF SF ZF

       Subtracts destination value from source without saving results.
       Updates flags based on the subtraction and  the index registers
       (E)SI and (E)DI are incremented or decremented depending on the
       state of the Direction Flag.  CMPSB inc/decrements the index
       registers by 1, CMPSW inc/decrements by 2, while CMPSD increments
       or decrements by 4.  The REP prefixes can be used to process
       entire data items.

                                Clocks                 Size
       Operands         808x  286   386   486          Bytes

       dest,src          22    8     10    8             1  (W88=30)

       - see Instruction Timing

Esc or Alt-X to exit cmps Home/PgUp/PgDn/End ←↑↓→
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