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From: | Tom Burgess <Tom_Burgess AT bc DOT sympatico DOT ca> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: What is faster STOSD or MOVSD |
Date: | Mon, 14 Apr 1997 21:51:32 -0700 |
Organization: | BCTEL Advanced Communications |
Lines: | 14 |
Message-ID: | <33530954.4366@bc.sympatico.ca> |
References: | <5iu501$rqj AT nr1 DOT toronto DOT istar DOT net> |
NNTP-Posting-Host: | pntn02m01-21.bctel.ca |
Mime-Version: | 1.0 |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Jeff Weeks wrote: > > Which is faster? > > rep stosd or > rep movsd > 486 cycles Pentium rep movs: 11+(3.3)n 13+(1.1)n rep stos: 8+(4.1)n 5+(4.5)n rep movs wins (for aligned transfers within primary cache). Recommended book for good info on optimization issues: "Inner Loops" by Rick Booth. regards, tom
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