From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2320C433E0 for ; Tue, 19 May 2020 15:31:09 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6D2D620809 for ; Tue, 19 May 2020 15:31:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6D2D620809 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 49RKbb1PCQzDqyS for ; Wed, 20 May 2020 01:31:07 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=permerror (SPF Permanent Error: Unknown mechanism found: ip:192.40.192.88/32) smtp.mailfrom=kernel.crashing.org (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=segher@kernel.crashing.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) by lists.ozlabs.org (Postfix) with ESMTP id 49RKY8107RzDqjJ for ; Wed, 20 May 2020 01:28:59 +1000 (AEST) Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 04JFSunG017874; Tue, 19 May 2020 10:28:56 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 04JFStx3017873; Tue, 19 May 2020 10:28:55 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Tue, 19 May 2020 10:28:55 -0500 From: Segher Boessenkool To: "Paul A. Clarke" Subject: Re: [PATCH v2 6/7] powerpc/dt_cpu_ftrs: Add MMA feature Message-ID: <20200519152855.GN31009@gate.crashing.org> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200519152240.GB24922@oc3272150783.ibm.com> User-Agent: Mutt/1.4.2.3i 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 10:22:40AM -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). Segher