From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12009 invoked by alias); 6 Feb 2003 12:48:27 -0000 Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-help-owner@gcc.gnu.org Received: (qmail 12002 invoked from network); 6 Feb 2003 12:48:27 -0000 Received: from unknown (HELO smtp-relay-2.adobe.com) (192.150.11.2) by 172.16.49.205 with SMTP; 6 Feb 2003 12:48:27 -0000 Received: from inner-relay-2.corp.adobe.com (inner-relay-2 [153.32.1.52]) by smtp-relay-2.adobe.com (8.12.3/8.12.3) with ESMTP id h16CmOAC018674 for ; Thu, 6 Feb 2003 04:48:24 -0800 (PST) Received: from iplan-mn.corp.adobe.com (iplan-mn.corp.adobe.com [130.248.25.5]) by inner-relay-2.corp.adobe.com (8.12.3/8.12.3) with ESMTP id h16CmJ4W001939 for ; Thu, 6 Feb 2003 04:48:19 -0800 (PST) Received: from [130.248.25.220] ([153.32.12.150]) by iplan-mn.corp.adobe.com (Netscape Messaging Server 4.15 mn Jul 11 2001 16:32:57) with ESMTP id H9W0WI00.SJQ; Thu, 6 Feb 2003 06:48:18 -0600 User-Agent: Microsoft-Entourage/10.0.0.1331 Date: Thu, 06 Feb 2003 12:48:00 -0000 Subject: Re: Optimise a build for floating point operation From: John Love-Jensen To: =?ISO-8859-1?B?2A==?=ystein O Johansen CC: Message-ID: In-Reply-To: Mime-version: 1.0 Content-type: text/plain; charset="ISO-8859-1" Content-transfer-encoding: quoted-printable X-SW-Source: 2003-02/txt/msg00070.txt.bz2 Hi =D8ystein, >Does that means the -malign-double won't help me? Yes, -malign-double won't help you if you are using floats and not using doubles. > I'm now using: > -O3 -march=3Dpentium-mmx -mcpu=3Dpentium-mmx -msse -mfpmath=3Dsse -mno-ie= ee-fp > -ffast-math >=20 > Does this sound like a smart setting? I'd drop the mmx parts. And, if appropriate, put in the sse2 flag. Otherwise, yes, sounds like smart settings for your project's purposes. Sincerely, --Eljay