From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yb1-xb36.google.com (mail-yb1-xb36.google.com [IPv6:2607:f8b0:4864:20::b36]) by sourceware.org (Postfix) with ESMTPS id 0E7D73858D39 for ; Wed, 3 Nov 2021 21:26:53 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 0E7D73858D39 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-yb1-xb36.google.com with SMTP id v64so9643731ybi.5 for ; Wed, 03 Nov 2021 14:26:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=hjxpbYLU0eUoH/qshpCeoIQb4qJATbBuHQEuT2dAYfo=; b=G5bRNpckEsaHyb4OhVatlT07Tsq1KMniEFPR5EbSGVLKVeMA3tAZ4Tp/+WpOH1GTzx ptUm5V4jRmo/UDXgejb7wGRz5D3VwfU1odMAcaZAXhl5CdhKU7z3CZKXkbFmhap+dgfN StRLSEoLnJc8prz0OO/NKeYf1KpP4rdSoYWge9qpCWhMAKIHnOLLFxurSOh4PUr6S3T8 9m/r15HpwFrp1u1zhbxRXfRMgCg6+NwlHanAlguiWIv/R9TN3GP0fj415r8lWUm/NINI u3tGZg7RzIeocJiCOE3Ao13vy2lGbmws/2YIZWVIiWLePDGC6Y/d68qYkZ5W+5BsYBq6 WC6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=hjxpbYLU0eUoH/qshpCeoIQb4qJATbBuHQEuT2dAYfo=; b=AUxSLk6RoLBDkKOn+Uzhc8rvRmx18H3pzT8fxNlynHnJPvQdO3OoMz4UWuLzABSch7 ICYzlFNoqrpNEX0MqVwawfFGUqOxcEAAr8pYqAz3sk4PX6z4+/XztbZY0nTluvveN0So LF8zn6eAXauGR863mMaiLTUmromlu7xDtRoyF5pS05lwrHs57p6oO9YtNlaZZ0APsqbe noNdANoFH5J+v6IGpGql9LADk3rSPEx9KXzgW3GXtBrzN3PiPTYS54YAcBTRe1IWitjQ FcOhaFjAMTkuiDd9EyGRU8M/UoUlm9DxgsLE4Bf243KUUCNnc7aLOuT/6OXhtgg14ORV 1YRg== X-Gm-Message-State: AOAM532VszvRpbpK9k0Jxpt5oyz4txnemYCr/HLVGJ6IVKdUBlwX6mv5 FUUiVxmiTpNOj0g883hyX9KaEbxg3+/S5dTdXtbed3Sltlg= X-Google-Smtp-Source: ABdhPJwALvIcMojWFMsnHDXPSc59ehrC7KVad0r9qLS/FEtCN8cAjxjSMDf8f/wuy/lxsq/Nts6JMp3s/+ZjNQbDcto= X-Received: by 2002:a25:dc42:: with SMTP id y63mr15261951ybe.402.1635974812709; Wed, 03 Nov 2021 14:26:52 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Pavel M Date: Thu, 4 Nov 2021 00:26:16 +0300 Message-ID: Subject: Fwd: gcc 11.1.0: printf("%.43f\n", 0x1.52f8a8e32e982p-140): printed value is incorrectly rounded To: newlib@sourceware.org X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, HTML_MESSAGE, KAM_LOTSOFHASH, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 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: Wed, 03 Nov 2021 21:26:54 -0000 ---------- Forwarded message --------- From: Pavel M Date: Sat, 12 Jun 2021 at 23:45 Subject: gcc 11.1.0: printf("%.43f\n", 0x1.52f8a8e32e982p-140): printed value is incorrectly rounded To: Sample code (t903.c): #include int main(void) { printf("%.43f\n", 0x1.52f8a8e32e982p-140); return 0; } Invocations: # gcc on Windows 10 (Cygwin) $ gcc t903.c -Wall -Wextra -std=c11 -pedantic -Wfatal-errors && ./a.exe 0.0000000000000000000000000000000000000000010 $ gcc --version gcc (GCC) 11.1.0 # gcc on Linux $ gcc t903.c -Wall -Wextra -std=c11 -pedantic -Wfatal-errors && ./a.exe 0.0000000000000000000000000000000000000000009 # clang on Windows $ clang t903.c -Wall -Wextra -std=c11 -ffp-model=strict -pedantic -Wfatal-errors && ./a.exe 0.0000000000000000000000000000000000000000009 # cl on Windows $ cl t903.c /std:c11 /Za /fp:strict && ./t903.exe 0.0000000000000000000000000000000000000000009