Re: faster strcpy()
Vojtech Pavlik (vojtech@twilight.ucw.cz)
Mon, 27 Apr 1998 12:34:52 +0200
On Mon, Apr 27, 1998 at 10:28:02AM +0200, Mikael Klasson wrote:
> > > > I don't know c or i386 assembler, but there are string commands. Would
> > > one of
> > > > them do it? I don't have my assembler book handy. Is there a store and
> > > > continue while zero?
> > >
> > > No. There's "rep movsX" (where X is b/w/d) for moving data but that one
> > > requires ecx to be initialized to the number of items to copy and
> > > doesn't care much about what it's copying. A "lodsd" and "stosd"
> >
> > What about repnz? What do you think it does?
>
> It's for use with cmpsX and scasX.
Yes, I realized that a couple seconds after sending the message. The
movsX instruction unfortunately doesn't set the right flags.
Vojtech
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