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To: freebsd-hackers@freebsd.org
Subject: outb/inb usage
Date: Wed, 15 Nov 1995 16:45:46 +0100
From: Torbjorn Granlund <tege@matematik.su.se>
Sender: owner-hackers@freebsd.org
Precedence: bulk

Now that GCC 2.7.1 is out, you should consider changing the way outb/inb
is used in inline asm constructs.  This is the right way to do it now:

__asm __volatile ("outb %b0,%w1" : : "a" (x), "Nd" (0));
__asm __volatile ("outb %b0,%w1" : : "a" (x), "Nd" (1000));
__asm __volatile ("outb %b0,%w1" : : "a" (x), "Nd" (port));

For older versions of GCC, simply leave out the `N'.