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Clarke" To: Segher Boessenkool Subject: Re: [PATCH v2 6/7] powerpc/dt_cpu_ftrs: Add MMA feature Message-ID: <20200519154922.GC24922@oc3272150783.ibm.com> References: <20200519003157.31946-1-alistair@popple.id.au> <20200519003157.31946-7-alistair@popple.id.au> <20200519144922.GA24922@oc3272150783.ibm.com> <20200519150556.GM31009@gate.crashing.org> <20200519152240.GB24922@oc3272150783.ibm.com> <20200519152855.GN31009@gate.crashing.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200519152855.GN31009@gate.crashing.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.676 definitions=2020-05-19_04:2020-05-19, 2020-05-19 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 bulkscore=0 cotscore=-2147483648 priorityscore=1501 malwarescore=0 clxscore=1015 phishscore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005190131 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alistair Popple , mikey@neuling.org, linuxppc-dev@lists.ozlabs.org, npiggin@gmail.com, aneesh.kumar@linux.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, May 19, 2020 at 10:28:55AM -0500, Segher Boessenkool wrote: > On Tue, May 19, 2020 at 10:22:40AM -0500, Paul A. Clarke wrote: > > On Tue, May 19, 2020 at 10:05:56AM -0500, Segher Boessenkool wrote: > > > On Tue, May 19, 2020 at 09:49:22AM -0500, Paul A. Clarke wrote: > > > > On Tue, May 19, 2020 at 10:31:56AM +1000, Alistair Popple wrote: > > > > > Matrix multiple accumulate (MMA) is a new feature added to ISAv3.1 and > > > > > > > > nit: "Matrix-Multiply Accelerator". > > > > > > "Matrix-Multiply Assist" in fact :-) > > > > Not according to the ISA (p. 1129). > > There is one mistake in the 3.1 ABI yes, in the description for the PCR > bit of this same name. Everything else calls this "assist", like all > similar things are called as well (whereas an "accelerator" is an > external device). I stand corrected. The PCR bit description is in error, and that's what I was going by. Section 7.6.1.12 "VSX Matrix-Multiply Assist (MMA) Instructions" seems to be more definitive. Thanks, Segher, for correcting my correction. Should be "Matrix-Multiply Assist". :-) PC