From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by sourceware.org (Postfix) with ESMTPS id 2E6C6386F022 for ; Fri, 11 Dec 2020 17:28:18 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 2E6C6386F022 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=inria.fr Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=Paul.Zimmermann@inria.fr X-IronPort-AV: E=Sophos;i="5.78,412,1599516000"; d="scan'208";a="482536698" Received: from tomate.loria.fr (HELO tomate) ([152.81.10.51]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Dec 2020 18:28:17 +0100 Date: Fri, 11 Dec 2020 18:28:17 +0100 Message-Id: From: Paul Zimmermann To: newlib@sourceware.org Subject: large pow error X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: newlib@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Newlib mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Dec 2020 17:28:19 -0000 Hi, I found a similar case (x close to 1 and large y) for double precision: x = 0x1.fffffd2e3e669p-1 y = 0x1.344c9823eb66cp+32 I find an error of 427.893 ulps with Newlib 3.3.0, whereas all other inputs I tried have an error of less than 1 ulp. Best regards, Paul