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ProfitPress Mega CDROM2 …eeware (MSDOS)(1992)(Eng)
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ProfitPress-MegaCDROM2.B6I
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ASSEMBLY
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ZENDISK1.ZIP
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LST4-5.ASM
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Assembly Source File
|
1990-02-15
|
328 b
|
15 lines
;
; *** Listing 4-5 ***
;
; Measures the performance of 1000 SHR instructions
; in a row. Since SHR executes in 2 cycles but is
; 2 bytes long, the prefetch queue is always empty,
; and prefetching time determines the overall
; performance of the code.
;
call ZTimerOn
rept 1000
shr ax,1
endm
call ZTimerOff