From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18798 invoked by alias); 14 May 2003 20:56:02 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 18746 invoked by uid 71); 14 May 2003 20:56:01 -0000 Date: Wed, 14 May 2003 20:56:00 -0000 Message-ID: <20030514205601.18711.qmail@sources.redhat.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, From: Wolfgang Bangerth Subject: Re: optimization/10772: Result differences between debug and optmize libs on linux; and with sol/nt on optimize mode Reply-To: Wolfgang Bangerth X-SW-Source: 2003-05/txt/msg01694.txt.bz2 List-Id: The following reply was made to PR optimization/10772; it has been noted by GNATS. From: Wolfgang Bangerth To: omar beo Cc: gcc-bugs@gcc.gnu.org, Subject: Re: optimization/10772: Result differences between debug and optmize libs on linux; and with sol/nt on optimize mode Date: Wed, 14 May 2003 15:52:52 -0500 (CDT) > But this did not answer the original question, why I’m not getting the same > results in the other platforms? Because x86 has a fundamentally broken floating point model with different accuracy of floats in registers and in memory. x86 FP computations are fundamentally unreliable if you're used to thinking in what "decent" processors do. W. ------------------------------------------------------------------------- Wolfgang Bangerth email: bangerth@ices.utexas.edu www: http://www.ices.utexas.edu/~bangerth/