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Thu, 21 Jan 2021 17:55:39 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AC470C605A; Thu, 21 Jan 2021 17:55:39 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 409E5C6057; Thu, 21 Jan 2021 17:55:39 +0000 (GMT) Received: from linux.ibm.com (unknown [9.160.92.204]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 21 Jan 2021 17:55:38 +0000 (GMT) To: Florian Weimer , libc-alpha@sourceware.org Subject: Re: POWER build failure due to scv instruction In-Reply-To: <87y2gmtekt.fsf@oldenburg.str.redhat.com> References: <87y2gmtekt.fsf@oldenburg.str.redhat.com> User-Agent: Notmuch/0.31.3 (http://notmuchmail.org) Emacs/27.1 (x86_64-redhat-linux-gnu) Date: Thu, 21 Jan 2021 14:55:37 -0300 Message-ID: <874kja41k6.fsf@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2021-01-21_09:2021-01-21, 2021-01-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 mlxscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 priorityscore=1501 bulkscore=0 adultscore=0 impostorscore=0 phishscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101210090 X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Tulio Magno Quites Machado Filho via Libc-alpha Reply-To: Tulio Magno Quites Machado Filho Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" Florian Weimer via Libc-alpha writes: > This seems to happen with only some binutils versions. Specifically, I > see it with 4100e6999664833defb8ee038f75812d9b85f9c7 from > binutils-2_35-branch, but oddly enough not with Fedora's 2.35.1-21.fc34 > version, which is why I haven't reported this so far. I haven't seen this yet. Using ".machine power9" in this code will require Binutils 2.27. We already have other places doing the same thing and that's why I proposed this patch: https://patchwork.sourceware.org/project/glibc/patch/20201202225602.1085609-1-tuliom@linux.ibm.com/ I'm afraid that's too late for glibc 2.33, but I plan to submit it for 2.34. > In any case, NEWS and INSTALL need to be updated with the appropriate > binutils version requirement. If scv instruction support is required, > that would be 2.29, I think, but better double-check this. That's indeed Binutils 2.27. An alternative solution is to use a .long with the scv 0 instruction. -- Tulio Magno