From patchwork Mon Oct 12 15:21:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Weimer X-Patchwork-Id: 40707 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 92AF1388EC2E; Mon, 12 Oct 2020 15:22:08 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 92AF1388EC2E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1602516128; bh=3ilzHUGhlT++1d0bdG/xL5cBg+yDK50Xx22oBTr/vro=; 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=pw3HKp9qhhBZhZ9fDIgBXbtOAxe9hoR3Ov81mIXxGCJaj5u4Iqi0z327U9r/doh3c yZx6TuZqPz7SIE8LetgsZx+1+9vTpHbZ/zUHnMRON7N+CQYSpYf4SSRPzPVEMc1Yrq t9vCtnx2haYAOvBZAQaZLLKrxcO4k6SLB+Gc9N2k= 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 152BF386F439 for ; Mon, 12 Oct 2020 15:22:05 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 152BF386F439 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-I0ImEBIjMZ655grWjmOGFw-1; Mon, 12 Oct 2020 11:22:01 -0400 X-MC-Unique: I0ImEBIjMZ655grWjmOGFw-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 E527E1DDE3 for ; Mon, 12 Oct 2020 15:22:00 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-112-137.ams2.redhat.com [10.36.112.137]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3EED755772 for ; Mon, 12 Oct 2020 15:22:00 +0000 (UTC) To: libc-alpha@sourceware.org Subject: [PATCH v2 2/3] x86_64: Add glibc-hwcaps support In-Reply-To: References: Message-Id: <54bcc4776d50207d54ca1eae32bdffaa6ffe3c01.1602515612.git.fweimer@redhat.com> Date: Mon, 12 Oct 2020 17:21:58 +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 10.5.11.15 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/Makefile | 36 +++++++++++++++- sysdeps/x86_64/dl-hwcaps-subdirs.c | 66 ++++++++++++++++++++++++++++++ sysdeps/x86_64/tst-glibc-hwcaps.c | 65 +++++++++++++++++++++++++++++ 3 files changed, 166 insertions(+), 1 deletion(-) create mode 100644 sysdeps/x86_64/dl-hwcaps-subdirs.c create mode 100644 sysdeps/x86_64/tst-glibc-hwcaps.c diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile index 42b97c5cc7..16030715e7 100644 --- a/sysdeps/x86_64/Makefile +++ b/sysdeps/x86_64/Makefile @@ -144,7 +144,41 @@ CFLAGS-tst-auditmod10b.c += $(AVX512-CFLAGS) CFLAGS-tst-avx512-aux.c += $(AVX512-CFLAGS) CFLAGS-tst-avx512mod.c += $(AVX512-CFLAGS) endif -endif + +$(objpfx)tst-glibc-hwcaps: \ + $(objpfx)markermod2-1.so $(objpfx)markermod3-1.so $(objpfx)markermod4-1.so +$(objpfx)tst-glibc-hwcaps.out: \ + $(objpfx)markermod2.so \ + $(objpfx)glibc-hwcaps/x86-64-v2/markermod2.so \ + $(objpfx)markermod3.so \ + $(objpfx)glibc-hwcaps/x86-64-v2/markermod3.so \ + $(objpfx)glibc-hwcaps/x86-64-v3/markermod3.so \ + $(objpfx)markermod4.so \ + $(objpfx)glibc-hwcaps/x86-64-v2/markermod4.so \ + $(objpfx)glibc-hwcaps/x86-64-v3/markermod4.so \ + $(objpfx)glibc-hwcaps/x86-64-v4/markermod4.so \ + +$(objpfx)glibc-hwcaps/x86-64-v2/markermod2.so: $(objpfx)markermod2-2.so + $(make-target-directory) + cp $< $@ +$(objpfx)glibc-hwcaps/x86-64-v2/markermod3.so: $(objpfx)markermod3-2.so + $(make-target-directory) + cp $< $@ +$(objpfx)glibc-hwcaps/x86-64-v3/markermod3.so: $(objpfx)markermod3-3.so + $(make-target-directory) + cp $< $@ +$(objpfx)glibc-hwcaps/x86-64-v2/markermod4.so: $(objpfx)markermod4-2.so + $(make-target-directory) + cp $< $@ +$(objpfx)glibc-hwcaps/x86-64-v3/markermod4.so: $(objpfx)markermod4-3.so + $(make-target-directory) + cp $< $@ +$(objpfx)glibc-hwcaps/x86-64-v4/markermod4.so: $(objpfx)markermod4-4.so + $(make-target-directory) + cp $< $@ + + +endif # $(subdir) == elf ifeq ($(subdir),csu) gen-as-const-headers += tlsdesc.sym rtld-offsets.sym diff --git a/sysdeps/x86_64/dl-hwcaps-subdirs.c b/sysdeps/x86_64/dl-hwcaps-subdirs.c new file mode 100644 index 0000000000..c4d8b3a02a --- /dev/null +++ b/sysdeps/x86_64/dl-hwcaps-subdirs.c @@ -0,0 +1,66 @@ +/* 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"; +enum { subdirs_count = 3 }; + +uint32_t +_dl_hwcaps_subdirs_active (void) +{ + int active = 0; + + /* 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 _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); + ++active; + + /* 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 _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); + ++active; + + /* 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 _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); + ++active; + + return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); +} diff --git a/sysdeps/x86_64/tst-glibc-hwcaps.c b/sysdeps/x86_64/tst-glibc-hwcaps.c new file mode 100644 index 0000000000..b46e7cb236 --- /dev/null +++ b/sysdeps/x86_64/tst-glibc-hwcaps.c @@ -0,0 +1,65 @@ +/* glibc-hwcaps subdirectory test. x86_64 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 +#include + +extern int marker2 (void); +extern int marker3 (void); +extern int marker4 (void); + +/* Return the x86-64-vN level, 1 for the baseline. */ +static int +compute_level (void) +{ + /* These checks are not entirely accurate because they are limited + by GCC capabilities. But wrong results will only result from + inconsistent CPU models involving virtualization. */ + if (!(__builtin_cpu_supports ("sse3") + && __builtin_cpu_supports ("sse4.1") + && __builtin_cpu_supports ("sse4.2") + && __builtin_cpu_supports ("ssse3"))) + return 1; + if (!(__builtin_cpu_supports ("avx") + && __builtin_cpu_supports ("avx2") + && __builtin_cpu_supports ("bmi") + && __builtin_cpu_supports ("bmi2") + && __builtin_cpu_supports ("fma"))) + return 2; + if (!(__builtin_cpu_supports ("avx512f") + && __builtin_cpu_supports ("avx512bw") + && __builtin_cpu_supports ("avx512cd") + && __builtin_cpu_supports ("avx512dq") + && __builtin_cpu_supports ("avx512vl"))) + return 3; + return 4; +} + +static int +do_test (void) +{ + int level = compute_level (); + printf ("info: detected x86-64 micro-architecture level: %d\n", level); + TEST_COMPARE (marker2 (), MIN (level, 2)); + TEST_COMPARE (marker3 (), MIN (level, 3)); + TEST_COMPARE (marker4 (), MIN (level, 4)); + return 0; +} + +#include