From mboxrd@z Thu Jan  1 00:00:00 1970
From: cowan@mercury.ccil.org (John Cowan)
Date: Fri, 11 Dec 2015 20:50:04 -0500
Subject: [TUHS] why is sum reporting different checksum's between v6 and
 v7
In-Reply-To: <20151212012257.3740418C0AA@mercury.lcs.mit.edu>
References: <20151212012257.3740418C0AA@mercury.lcs.mit.edu>
Message-ID: <20151212015004.GA15143@mercury.ccil.org>

Noel Chiappa scripsit:

> I have this bit set that in C, 'char' is defined to be signed, 

If you mean in PDP-11 C, you're right, char is signed precisely because
MOVB sign extends.  In C in general, char's signedness is undefined.
Similarly the signedness of a bitfield is undefined, which means that
the portable range of a 1-bit field is just 0, though there is another
value that might be +1 or -1.

-- 
John Cowan          http://www.ccil.org/~cowan        cowan at ccil.org
Eric Raymond is the Margaret Mead of the Open Source movement.
          --Bruce Perens, a long time ago