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Re: bug?
- To: Ingo Krabbe <i dot krabbe at dokom dot net>
- Subject: Re: bug?
- From: Alexandre Oliva <aoliva at redhat dot com>
- Date: 19 Jun 2001 03:05:19 -0300
- Cc: David Berthelot <davidb at Magma-DA dot COM>, Ben Kohlen <bckohlen at yahoo dot com>, <gcc-help at gcc dot gnu dot org>
- Organization: GCC Team, Red Hat
- References: <Pine.LNX.4.33.0106182041070.13548-100000@flathead.burg.de>
On Jun 18, 2001, Ingo Krabbe <ikrabbe@earthling.net> wrote:
> Hmm, I see that we can also do
> x & (~(x^x)>>n) which is really easier :-)
This is only well-defined if x's type is unsigned. The behavior of
right-shifting negative values is undefined (or unspecified?)
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
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