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To: Robert Dewar <dewar@adacore.com>
Cc: Andrew Pinski <pinskia@physics.uc.edu>,
        Olivier Galibert <galibert@pobox.com>,
        "'gcc mailing list'" <gcc@gcc.gnu.org>,
        "'Andrew Haley'" <aph@redhat.com>, Dave Korn <dave.korn@artimi.com>
Subject: Re: signed is undefined and has been since 1992 (in GCC)
References: <20050628180203.GG52889@dspnet.fr.eu.org>
	<SERRANOVkwyBnVBwYkm00000277@SERRANO.CAM.ARTIMI.COM>
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	<882882640c20778910272cdd8e19eff4@physics.uc.edu>
	<m3fyv2ffnv.fsf@uniton.integrable-solutions.net>
	<42C1A5AF.3090905@adacore.com>
From: Gabriel Dos Reis <gdr@integrable-solutions.net>
In-Reply-To: <42C1A5AF.3090905@adacore.com>
Date: Tue, 28 Jun 2005 19:48:00 -0000
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Robert Dewar <dewar@adacore.com> writes:

| Gabriel Dos Reis wrote:
| 
| > The strict aliasing rule by itself does not show it is not a high level
| > assembly language.  There are chips out there where you cannot access
| > data willy-nilly through random register types.
| 
| And there are chips for which signed arithmetic is not wrap around!

yes, but that is irrelevant,  the assumptin was made that
one knows what the chip provides.  

numeric_limits<T> is target dependent.

-- Gaby