From patchwork Thu Oct 1 16:33:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Weimer X-Patchwork-Id: 40610 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 4D40C398B88A; Thu, 1 Oct 2020 16:33:31 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4D40C398B88A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1601570011; bh=FCIa8b4lxyb3i/Rq0KyfRAHl9NeBcH8uTdlB4sakMu4=; 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=nXKX+f68R4lwlbRCexp0LNjOZfz6JJsdoGtRQlrr4DRYUarN8QAgwRUODmtlkCimy /LUuhu40Zf8HN2UxfHGNUtgffwuEk9XRTUp6Ypc4Y7Qn4DkqOFNG3WaSbOmTRcCI1U a03rCxonl4u+bEiww3HZja8+s2wfFtCe1uiK2c/4= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by sourceware.org (Postfix) with ESMTP id 8FA99398B897 for ; Thu, 1 Oct 2020 16:33:28 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 8FA99398B897 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-294-66ch4etRO5imJ0NsYZBDPg-1; Thu, 01 Oct 2020 12:33:26 -0400 X-MC-Unique: 66ch4etRO5imJ0NsYZBDPg-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 6C74756BF3 for ; Thu, 1 Oct 2020 16:33:25 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-114-84.ams2.redhat.com [10.36.114.84]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DD87F61177 for ; Thu, 1 Oct 2020 16:33:24 +0000 (UTC) To: libc-alpha@sourceware.org Subject: [PATCH 17/28] x86_64: Add glibc-hwcaps support In-Reply-To: References: Message-Id: Date: Thu, 01 Oct 2020 18:33:23 +0200 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (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=-11.4 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_H5, 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" The subdirectories match those in the x86-64 psABI: https://gitlab.com/x86-psABIs/x86-64-ABI/-/commit/77566eb03bc6a326811cb7e9a6b9396884b67c7c --- sysdeps/x86_64/dl-hwcaps-subdirs.c | 69 ++++++++++++++++++++++++++++++ 1 file changed, 69 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..0a732a026b --- /dev/null +++ b/sysdeps/x86_64/dl-hwcaps-subdirs.c @@ -0,0 +1,69 @@ +/* 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[] = "x86-64-v4:x86-64-v3:x86-64-v2"; + +int32_t +_dl_hwcaps_subdirs_active (void) +{ + int32_t result = 0; + int32_t bit = 1 << 2; + + /* Test in reverse preference order. */ + + /* x86-64-v2. */ + if (!(CPU_FEATURE_USABLE (CMPXCHG16B) + && CPU_FEATURE_USABLE (LAHF64_SAHF64) + && CPU_FEATURE_USABLE (POPCNT) + && CPU_FEATURE_USABLE (SSE3) + && CPU_FEATURE_USABLE (SSE4_1) + && CPU_FEATURE_USABLE (SSE4_2) + && CPU_FEATURE_USABLE (SSSE3))) + return result; + result |= bit; + bit >>= 1; + + /* x86-64-v3. */ + if (!(CPU_FEATURE_USABLE (AVX) + && CPU_FEATURE_USABLE (AVX2) + && CPU_FEATURE_USABLE (BMI1) + && CPU_FEATURE_USABLE (BMI2) + && CPU_FEATURE_USABLE (F16C) + && CPU_FEATURE_USABLE (FMA) + && CPU_FEATURE_USABLE (LZCNT) + && CPU_FEATURE_USABLE (MOVBE) + && CPU_FEATURE_USABLE (OSXSAVE))) + return result; + result |= bit; + bit >>= 1; + + /* x86-64-v4. */ + if (!(CPU_FEATURE_USABLE (AVX512F) + && CPU_FEATURE_USABLE (AVX512BW) + && CPU_FEATURE_USABLE (AVX512CD) + && CPU_FEATURE_USABLE (AVX512DQ) + && CPU_FEATURE_USABLE (AVX512VL))) + return result; + result |= bit; + bit >>= 1; + + return result; +}