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=-13.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 29F65C2BB9A for ; Thu, 17 Dec 2020 18:53:40 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 98C5C23998 for ; Thu, 17 Dec 2020 18:53:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 98C5C23998 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50068 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kpyPC-0005zD-NH for qemu-devel@archiver.kernel.org; Thu, 17 Dec 2020 13:53:38 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:32922) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kpyIX-0006QX-KT for qemu-devel@nongnu.org; Thu, 17 Dec 2020 13:46:45 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:54843) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kpyIV-0001z6-DR for qemu-devel@nongnu.org; Thu, 17 Dec 2020 13:46:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1608230801; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZvnG3CGJpfJaf4kt4vYs6l/2gUhYnvFQizJW0VT+Mhs=; b=QS+dfefQPatmvyUWnnIpZ1GhGkFIuUBdsYbNw4zUv2CJ4gp/8STHbrFsm3QaEGGXNYN0AQ gyh4QH/3TKAHJeNqCN5epiWbMv5xG5vE8LVizf4LFSHMG2SlnFGL3P928VdgOXzYN488T0 XkHZ4Lt0/G23yvyLplK8CBZDwTztUPY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-382-GgT_3vlwOimo85FEtJErLw-1; Thu, 17 Dec 2020 13:46:37 -0500 X-MC-Unique: GgT_3vlwOimo85FEtJErLw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8E3B1800D53; Thu, 17 Dec 2020 18:46:36 +0000 (UTC) Received: from localhost (ovpn-115-226.rdu2.redhat.com [10.10.115.226]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4A7D15D6DC; Thu, 17 Dec 2020 18:46:36 +0000 (UTC) From: Eduardo Habkost To: Peter Maydell , qemu-devel@nongnu.org Subject: [PULL 11/17] x86/cpu: Add AVX512_FP16 cpu feature Date: Thu, 17 Dec 2020 13:46:14 -0500 Message-Id: <20201217184620.3945917-12-ehabkost@redhat.com> In-Reply-To: <20201217184620.3945917-1-ehabkost@redhat.com> References: <20201217184620.3945917-1-ehabkost@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=ehabkost@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=63.128.21.124; envelope-from=ehabkost@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=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: , Cc: Cathy Zhang , Paolo Bonzini , Eduardo Habkost , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Cathy Zhang AVX512 Half-precision floating point (FP16) has better performance compared to FP32 if the presicion or magnitude requirements are met. It's defined as CPUID.(EAX=7,ECX=0):EDX[bit 23]. Refer to https://software.intel.com/content/www/us/en/develop/download/\ intel-architecture-instruction-set-extensions-programming-reference.html Signed-off-by: Cathy Zhang Message-Id: <20201216224002.32677-1-cathy.zhang@intel.com> Signed-off-by: Eduardo Habkost --- target/i386/cpu.h | 2 ++ target/i386/cpu.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index ee03263800..9b2ced97ea 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -784,6 +784,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_7_0_EDX_SERIALIZE (1U << 14) /* TSX Suspend Load Address Tracking instruction */ #define CPUID_7_0_EDX_TSX_LDTRK (1U << 16) +/* AVX512_FP16 instruction */ +#define CPUID_7_0_EDX_AVX512_FP16 (1U << 23) /* Speculation Control */ #define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Single Thread Indirect Branch Predictors */ diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 45b0588af3..608e9cacf9 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -979,7 +979,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { "avx512-vp2intersect", NULL, "md-clear", NULL, NULL, NULL, "serialize", NULL, "tsx-ldtrk", NULL, NULL /* pconfig */, NULL, - NULL, NULL, NULL, NULL, + NULL, NULL, NULL, "avx512-fp16", NULL, NULL, "spec-ctrl", "stibp", NULL, "arch-capabilities", "core-capability", "ssbd", }, -- 2.28.0