From patchwork Mon Jun 22 15:14:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Weimer X-Patchwork-Id: 39750 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 38EDB3938C0E; Mon, 22 Jun 2020 15:14:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 38EDB3938C0E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1592838884; bh=Zk8Ho3/9M/df+edjFxEsLF8jTHMlng3DlPnISwQEo8I=; h=To:Subject:In-Reply-To:References:Date:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To: From; b=A4NMfJY38xa/cdL5FU2Zkr8tABabD45ke7x4Mi/tdie6OX3hK+D3UbyUYL31fUhPJ 7PdkS+WMkK8D1pTvzyI/rl/UjV3a6wfVBbRluawOVlcXAtOdHs6Vb8HJoFh4yG8fbj ALIrPF2Hvd+Ea13sCKJ2cKcq62q5EvZTGpHgwHo8= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by sourceware.org (Postfix) with ESMTP id 0172E3938C0E for ; Mon, 22 Jun 2020 15:14:41 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 0172E3938C0E 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-60-h7cghlXNOSajQ_WZZOEu3g-1; Mon, 22 Jun 2020 11:14:39 -0400 X-MC-Unique: h7cghlXNOSajQ_WZZOEu3g-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EFE48805730 for ; Mon, 22 Jun 2020 15:14:38 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-112-185.ams2.redhat.com [10.36.112.185]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6D32060BEC for ; Mon, 22 Jun 2020 15:14:38 +0000 (UTC) To: libc-alpha@sourceware.org Subject: [PATCH 19/30] x86_64: Add glibc-hwcaps support In-Reply-To: References: Message-Id: <6b56704d61b2fddf9e03eb5d0781d0fff57db96a.1592836143.git.fweimer@redhat.com> Date: Mon, 22 Jun 2020 17:14:37 +0200 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-12.9 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org 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: , X-Patchwork-Original-From: Florian Weimer via Libc-alpha From: Florian Weimer Reply-To: Florian Weimer Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" Details of the supported CPU flags and the names are still subject to changes. --- sysdeps/x86_64/dl-hwcaps-subdirs.c | 73 ++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 sysdeps/x86_64/dl-hwcaps-subdirs.c diff --git a/sysdeps/x86_64/dl-hwcaps-subdirs.c b/sysdeps/x86_64/dl-hwcaps-subdirs.c new file mode 100644 index 0000000000..4a8fae976e --- /dev/null +++ b/sysdeps/x86_64/dl-hwcaps-subdirs.c @@ -0,0 +1,73 @@ +/* Architecture-specific glibc-hwcaps subdirectories. x86 version. + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include + +const char _dl_hwcaps_subdirs[] = "x86-103:x86-102:x86-101:x86-100"; + +int32_t +_dl_hwcaps_subdirs_active (void) +{ + const struct cpu_features *cpu_features = __get_cpu_features (); + int32_t result = 0; + int32_t bit = 1 << 3; + + /* Test in reverse preference order. */ + + /* x86-100. */ + if (!(CPU_FEATURES_ARCH_P (cpu_features, CMPXCHG16B_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, POPCNT_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, SSE3_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, SSE4_1_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, SSE4_2_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, SSSE3_Usable))) + return result; + result |= bit; + bit >>= 1; + + /* x86-101. */ + if (!(CPU_FEATURES_ARCH_P (cpu_features, AVX_Usable))) + return result; + result |= bit; + bit >>= 1; + + /* x86-102. */ + if (!(CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, BMI1_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, BMI2_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, F16C_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, FMA_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, LZCNT_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, MOVBE_Usable))) + return result; + result |= bit; + bit >>= 1; + + /* x86-103. */ + if (!(CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable) + && CPU_FEATURES_CPU_P (cpu_features, AVX512BW) + && CPU_FEATURES_CPU_P (cpu_features, AVX512CD) + && CPU_FEATURES_CPU_P (cpu_features, AVX512DQ) + && CPU_FEATURES_CPU_P (cpu_features, AVX512VL))) + return result; + result |= bit; + bit >>= 1; + + return result; +}