delorie.com/archives/browse.cgi   search  
Mail Archives: djgpp/1996/12/16/09:11:47

Date: Mon, 16 Dec 1996 08:47:01 -0500
Message-Id: <199612161347.IAA01261@delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: leathm AT gbrmpa DOT gov DOT au
CC: Kevin AT Quitt DOT net, djgpp AT delorie DOT com
In-reply-to: <32B4F808.3645@gbrmpa.gov.au> (message from Leath Muller on Mon,
16 Dec 1996 15:19:40 +0800)
Subject: Re: Is DJGPP that efficient?

> > Without being too facetious, the problem is that the Intel architecture is
> > so poorly suited for such calculations that the optimal is still none too
> > good.  But yes, DJGPP is pretty good.
>
> Ummm...not meaning to start any wars... but your joking right? :)
> The FPU in the pentium is pretty damn good... 3 cycles for a mul, 1
> for an add, while being able to run in parallel with the integer
> unit...seems pretty cool to me! :)

There are other considerations besides opcode speed.  For example, the
fpu only has eight registers; other types have up to 32, and you must
access the registers in a stack-like way, instead of through standard
numbered register.  These may also affect the overall efficiency of
any FPU code.

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019