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Date: 21 Dec 2003 14:33:40 +0200
Message-Id: <uk74ql597.fsf@elta.co.il>
From: Eli Zaretskii <eliz AT elta DOT co DOT il>
To: "Gisle Vanem" <giva AT bgnett DOT no>
CC: djgpp AT delorie DOT com
In-reply-to: <1d1801c3c7b6$b436a040$0600000a@broadpark.no> (giva@bgnett.no)
Subject: Re: Is this optimizable ?
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> From: "Gisle Vanem" <giva AT bgnett DOT no>
> Date: Sun, 21 Dec 2003 12:36:41 +0100
> > 
> > I am giving the compiler the -O3 option
> > 
> > Only trouible is, my for() loop is not fast enough. 
> 
> How do to know? It may be your board is insert wait-states betwen
> each port read.

Good questions, IMHO.  The OP is encouraged to post information about
the speed of the for-loop, and why is that ``not fast enough''.

> You can use a "rep insb" or "rep insw" instructions if 
> the board can keep up.
> 
> extern inline void rep_insb (unsigned short port, unsigned char *buf, size_t bytes) 

DJGPP already has in its library functions inportsb, inportsw, and
inportsl to do this.