From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 1375C3858C5F for ; Mon, 24 Jul 2023 19:45:20 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 1375C3858C5F Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1690227919; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=+K+jAtbrtFHY7YjHZhMIqEInFEvRpylLSYHrhntNNAI=; b=baRdQhCGcD7qtPr8lInKmgxvfkE+5r95nmJlsELNoArzdl/u4VHSu8kD6ucdNvGNWcIDvT /vB3p9M1yQ2Kz6BKucCPTljFvGIihnbTk+yjb5qAwndhjdPNTs9BpTlFksB5oWxcpcX8L3 Gmy7mH6S1OrnwaaX6niXrCuO5dYSPno= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-561-2a5EPGTcO-OQ8KOr0XMDhg-1; Mon, 24 Jul 2023 15:45:17 -0400 X-MC-Unique: 2a5EPGTcO-OQ8KOr0XMDhg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 7F64E810BB2; Mon, 24 Jul 2023 19:45:17 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.45.224.18]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 44AF8200BA63; Mon, 24 Jul 2023 19:45:17 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.17.1/8.17.1) with ESMTPS id 36OJjEIP3993613 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Mon, 24 Jul 2023 21:45:15 +0200 Received: (from jakub@localhost) by tucnak.zalov.cz (8.17.1/8.17.1/Submit) id 36OJjEfB3993612; Mon, 24 Jul 2023 21:45:14 +0200 Date: Mon, 24 Jul 2023 21:45:13 +0200 From: Jakub Jelinek To: Joseph Myers Cc: Aldy Hernandez , Andrew MacLeod , gcc-patches@gcc.gnu.org Subject: Re: [PATCH] range-op-float: Fix up -frounding-math frange_arithmetic +- handling [PR110755] Message-ID: Reply-To: Jakub Jelinek References: <9b1ab25f-c189-c53c-547-2f983c268a7f@codesourcery.com> MIME-Version: 1.0 In-Reply-To: <9b1ab25f-c189-c53c-547-2f983c268a7f@codesourcery.com> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-3.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Mon, Jul 24, 2023 at 07:39:05PM +0000, Joseph Myers wrote: > On Mon, 24 Jul 2023, Jakub Jelinek via Gcc-patches wrote: > > > I believe it is only +- which has this problematic behavior and I think > > fma has the same property (of rounding-mode-dependent exact results), but > I think that's not relevant here? Indeed, real_arithmetics doesn't handle FMA* and I think the ranger doesn't either as of now, if it would, it would likely use mpfr for that and indeed would need to take this into account. Jakub