From:	Vik Heyndrickx <Vik DOT Heyndrickx AT rug DOT ac DOT be>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: 32bit memcpy function?
Date:	Mon, 24 Nov 1997 09:47:56 +0100
Organization:	University of Ghent, Belgium
Lines:	18
Message-ID:	<34793F3C.298F@rug.ac.be>
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 971123153118 DOT 19570a-100000 AT is> <34791FD2 DOT DC541BF1 AT linux DOT dpilink DOT com>
NNTP-Posting-Host:	eduserv1.rug.ac.be
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Speed wrote:
> Eli Zaretskii wrote:
> > On Sat, 22 Nov 1997 wolfman AT cedar DOT alberni DOT net wrote:
> > > I was wondering if DJGPP has a 32bit memcpy function (memcpy uses
> > > 8bit right?)
> > Wrong.  `memcpy' in DJGPP uses 32-bit move instructions.

> So it is equivalent to a 'rep movsl'? (assuming, of course, the source,
> dest, and count are already set)

Even more. 'memcpy' is a compiler built-in function, hence additional
optimizations can be performed. So it is even possible it is faster than
'rep; movsl' on a particular machine!

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