From: "Joseph S. Myers" <jsm28@cam.ac.uk>
To: Joe Buck <jbuck@synopsys.COM>
Cc: Bernd Schmidt <bernds@redhat.com>, <gcc@gcc.gnu.org>
Subject: Re: Complex integer division
Date: Thu, 08 Nov 2001 12:58:00 -0000 [thread overview]
Message-ID: <Pine.LNX.4.33.0111192037240.16288-100000@kern.srcf.societies.cam.ac.uk> (raw)
In-Reply-To: <200111191550.HAA24738@atrus.synopsys.com>
On Mon, 19 Nov 2001, Joe Buck wrote:
> The only problematic operation is division, as complex ints are closed
> (modulo overflow) for +, -, and *. So deprecate only the problematic
> operation.
Multiplication could cause problems as well, since GCC might optimize
intermediate computations on the basis that signed integer overflow is
undefined and so fail to produce the correct answer when that is within
range.
--
Joseph S. Myers
jsm28@cam.ac.uk
prev parent reply other threads:[~2001-11-19 20:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-05 14:23 Joseph S. Myers
2001-11-05 15:31 ` Bernd Schmidt
2001-11-07 12:21 ` Joseph S. Myers
2001-11-07 19:06 ` Joe Buck
2001-11-08 12:58 ` Joseph S. Myers [this message]
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