From owner-cvs-all  Wed Jan 10 21:42:45 2001
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To: Peter Jeremy <peter.jeremy@alcatel.com.au>
Subject: Re: cvs commit: src/sys/alpha/include bus.h 
Cc: Matthew Jacob <mjacob@feral.com>,
	Matt Jacob <mjacob@FreeBSD.org>, cvs-committers@FreeBSD.org,
	cvs-all@FreeBSD.org
In-reply-to: Your message of "Thu, 11 Jan 2001 16:30:29 +1100."
		<20010111163029.B91242@gsmx07.alcatel.com.au> 
References: <20010111163029.B91242@gsmx07.alcatel.com.au>  <200101100441.f0A4f2s58670@harmony.village.org> <Pine.BSF.4.21.0101092200070.2888-100000@beppo.feral.com> 
Date: Wed, 10 Jan 2001 22:42:09 -0700
From: Warner Losh <imp@harmony.village.org>
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In message <20010111163029.B91242@gsmx07.alcatel.com.au> Peter Jeremy writes:
: fun()
: {
: 	foo = bar & ~0;
: }
: 
: Unfortunately, I don't have a functional FreeBSD/Alpha box right now,
: but both Compaq CC and gcc-2.8.1 generate "foo = bar".  I'm not sure
: that this behaviour makes sense.

Likely because ~0 is signed, and signed extended in the promotion from
int to unsigned long.

Warner


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