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Tue, 22 Sep 2020 09:22:22 +0000 (GMT) Received: from in.ibm.com (unknown [9.77.201.43]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 22 Sep 2020 09:22:22 +0000 (GMT) Date: Tue, 22 Sep 2020 14:52:20 +0530 From: Bharata B Rao To: David Hildenbrand Subject: Re: [Qemu-devel] [PATCH] target-ppc: Add quad precision muladd instructions Message-ID: <20200922092220.GA4843@in.ibm.com> References: <46207f02-b133-86f4-0e83-3cf9e8486ef7@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46207f02-b133-86f4-0e83-3cf9e8486ef7@redhat.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-09-22_06:2020-09-21, 2020-09-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 mlxscore=0 phishscore=0 priorityscore=1501 impostorscore=0 mlxlogscore=746 suspectscore=0 lowpriorityscore=0 adultscore=0 clxscore=1011 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009220071 Received-SPF: pass client-ip=148.163.158.5; envelope-from=bharata@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 05:22:33 X-ACL-Warn: Detected OS = Linux 3.x [generic] X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: bharata@linux.ibm.com Cc: "qemu-devel@nongnu.org" , qemu-s390x , nikunj.dadhania@gmail.com, qemu-ppc , Bharata B Rao , David Gibson , Alex =?iso-8859-1?Q?Benn=E9e?= , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Sep 22, 2020 at 10:04:53AM +0200, David Hildenbrand wrote: > Hi guys, > > I just stumbled over > > https://lore.kernel.org/qemu-devel/1487140636-19955-1-git-send-email-bharata@linux.vnet.ibm.com/ > > while looking for the state of float128_muladd(), as I need that for > s390x as well. > > @Bharata, did you manage to implement a prototype? Looking into > float128_mul() makes my head spin. I did try but couldn't figure out a way to implement some of the dependent functions. Hence we still don't have quad-precision multiply-add/sub instructions in ppc. Regards, Bharata.