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Assembly Source File  |  1997-06-18  |  292b  |  14 lines
  1. ; Listing 4.6. LST4-6.ASM
  2. ; Measures the performance of 1000 MUL/SHR instruction
  3. ; pairs in a row. The lengthy execution time of MUL
  4. ; should keep the prefetch queue from ever emptying.
  5. ;
  6.     mov    cx,1000
  7.     sub    ax,ax
  8.     call    ZTimerOn
  9.     rept    1000
  10.     mul    ax
  11.     shr    ax,1
  12.     endm
  13.     call    ZTimerOff
  14.