Path: chuka.playstation.co.uk!news
From: "pal" <pal_news@hotmail.com>
Newsgroups: scee.yaroze.freetalk.english
Subject: Re: Daft Question [long]
Date: 28 Aug 2001 23:27:36 GMT
Organization: PlayStation Net Yaroze (SCEE)
Lines: 17
Message-ID: <01c13018$85386ae0$122e1bd4@pal-s-omnibook>
References: <9loc6a$p3k2@www.netyaroze-europe.com> <9loeu8$p3k3@www.netyaroze-europe.com> <01c1297e$8cb6e8a0$LocalHost@pal-s-omnibook> <9lrqqf$3j63@www.netyaroze-europe.com> <01c129ca$a5a6f700$d81fe4d5@pal-s-omnibook> <9m1d9c$b2i7@www.netyaroze-europe.com> <01c12ceb$fba64880$9709e4d5@pal-s-omnibook> <9m9c88$ioj5@www.netyaroze-europe.com> <01c12edc$cc2bf440$991fe4d5@pal-s-omnibook> <9me1g1$1sb13@www.netyaroze-europe.com> <9meajl$1sb17@www.netyaroze-europe.com>
NNTP-Posting-Host: nas-cbv-5-46-18.dial.proxad.net
X-Newsreader: Microsoft Internet News 4.70.1155

Jon Prestidge  (Jon@surfed.to) <jon@surfed.to> wrote in article
<9meajl$1sb17@www.netyaroze-europe.com>...
> > I have absolutely no idea how fast an integer divide is
> 
> ... it's only one CPU instruction... it may take an extra clock cycle or
two
> longer to execute than a logical shift operation  for example, but it's
> still very, very quick.

Are you sure of those numbers Jon? Just a few cycles for a div sounded
quite unusual to me, so I had a look at some docs at mips' site; and what I
understood is that, for R3000 and R4000 at least, all arithmetic and logic
operations take one cycle except for muls and divs which can take up to
about 32 cycles. Did I miss something?

pal