From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by sourceware.org (Postfix) with ESMTPS id C0D8E3858C54 for ; Fri, 1 Jul 2022 22:36:36 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org C0D8E3858C54 Received: by mail-pl1-x632.google.com with SMTP id jb13so3601552plb.9 for ; Fri, 01 Jul 2022 15:36:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=VBvRII7TZm0r5+w+6q/REygkDTA0vetUpm5OOTS9dgY=; b=kC9YHvt+gIGgqbtAx20nQzdWw3ojn5IuVJjILqbFXasIk1UI1FvzKa2vxcxctmTMKh HXqyraU5cnlcu64ej6w8U82Vo9u2+Rep+cflkX19zfVh8e/VlMEh6bXSLY0RnxPxJDVP YuR8dRK+1QfjDxCuxipeq5kBIJI3it2hFAC09mdK78r0eXfahl3vEmm2o/9D0EJOmmdh gsBu0/Ph2fXm7t5xUSSqFLcxDALknHxLOG01OlUMdz/hyyqfIPwvEoVtN7eEObo49HMj sF/UPA/kF0Nkew2v2NCLv3cJsAxxR4O7uj8J3wYrknv932biOsbIfgytdY40zU2ce3Fg UiVg== X-Gm-Message-State: AJIora/vIjTo4NtyGfzzTzaSKXpDF9T5m96MwhePTrcNkd1+YrVUTvOj 0GFqoTw6nVtQGN4jbUvClG+BIRcIywH8Vch/d/p9Yaxl X-Google-Smtp-Source: AGRyM1ton1kdFoAWLSEYHihPL/fpejiu0IASve0r/Z9oXi2lb6LVtrKTbWnf+s4ZRLWtVqAfGP82uk/9vBa6/QiXOjg= X-Received: by 2002:a17:902:a502:b0:15e:c251:b769 with SMTP id s2-20020a170902a50200b0015ec251b769mr22350662plq.115.1656714995550; Fri, 01 Jul 2022 15:36:35 -0700 (PDT) MIME-Version: 1.0 References: <20220628152717.17838-1-goldstein.w.n@gmail.com> <20220630201319.3777218-1-goldstein.w.n@gmail.com> <20220630201319.3777218-2-goldstein.w.n@gmail.com> In-Reply-To: <20220630201319.3777218-2-goldstein.w.n@gmail.com> From: "H.J. Lu" Date: Fri, 1 Jul 2022 15:35:59 -0700 Message-ID: Subject: Re: [PATCH v6 2/2] x86: Add support for building str{c|p}{brk|spn} with explicit ISA level To: Noah Goldstein Cc: GNU C Library , "Carlos O'Donell" Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-3024.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) 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-List-Received-Date: Fri, 01 Jul 2022 22:36:40 -0000 On Thu, Jun 30, 2022 at 1:13 PM Noah Goldstein wrote: > > The changes for these functions are different than the others because > the best implementation (sse4_2) requires the generic > implementation as a fallback to be built as well. > > Changes are: > > 1. Add non-multiarch functions for str{c|p}{brk|spn}.c to statically > select the best implementation based on the configured ISA build > level. > > 2. Add stubs for str{c|p}{brk|spn}-generic and varshift.c to in the > sysdeps/x86_64 directory so that the the sse4 implementation will > have all of its dependencies for the non-multiarch / rtld build > when ISA level >= 2. > > 3. Add new multiarch/rtld-strcspn.c that just include the > non-multiarch strcspn.c which will in turn select the best > implementation based on the compiled ISA level. > > 4. Refactor the ifunc selector and ifunc implementation list to use > the ISA level aware wrapper macros that allow functions below the > compiled ISA level (with a guranteed replacement) to be skipped. > > Tested with and without multiarch on x86_64 for ISA levels: > {generic, x86-64-v2, x86-64-v3, x86-64-v4} > > And m32 with and without multiarch. > --- > sysdeps/x86_64/Makefile | 9 +++++++- > sysdeps/x86_64/multiarch/ifunc-impl-list.c | 6 +++++ > sysdeps/x86_64/multiarch/ifunc-sse4_2.h | 2 +- > sysdeps/x86_64/multiarch/rtld-strcspn.c | 18 +++++++++++++++ > sysdeps/x86_64/multiarch/strcspn-generic.c | 6 +++-- > sysdeps/x86_64/multiarch/strcspn-sse4.c | 9 +++++--- > sysdeps/x86_64/multiarch/strpbrk-generic.c | 5 +++- > sysdeps/x86_64/multiarch/strpbrk-sse4.c | 6 ++++- > sysdeps/x86_64/multiarch/strspn-generic.c | 7 ++++-- > sysdeps/x86_64/multiarch/strspn-sse4.c | 5 +++- > sysdeps/x86_64/multiarch/varshift.c | 4 +++- > sysdeps/x86_64/strcspn-generic.c | 25 ++++++++++++++++++++ > sysdeps/x86_64/strcspn.c | 27 ++++++++++++++++++++++ > sysdeps/x86_64/strpbrk-generic.c | 25 ++++++++++++++++++++ > sysdeps/x86_64/strpbrk.c | 27 ++++++++++++++++++++++ > sysdeps/x86_64/strspn-generic.c | 26 +++++++++++++++++++++ > sysdeps/x86_64/strspn.c | 27 ++++++++++++++++++++++ > sysdeps/x86_64/varshift.c | 26 +++++++++++++++++++++ > 18 files changed, 247 insertions(+), 13 deletions(-) > create mode 100644 sysdeps/x86_64/multiarch/rtld-strcspn.c > create mode 100644 sysdeps/x86_64/strcspn-generic.c > create mode 100644 sysdeps/x86_64/strcspn.c > create mode 100644 sysdeps/x86_64/strpbrk-generic.c > create mode 100644 sysdeps/x86_64/strpbrk.c > create mode 100644 sysdeps/x86_64/strspn-generic.c > create mode 100644 sysdeps/x86_64/strspn.c > create mode 100644 sysdeps/x86_64/varshift.c > > diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile > index 79365aff2a..e597a4855f 100644 > --- a/sysdeps/x86_64/Makefile > +++ b/sysdeps/x86_64/Makefile > @@ -14,7 +14,14 @@ sysdep_noprof += _mcount > endif > > ifeq ($(subdir),string) > -sysdep_routines += strcasecmp_l-nonascii strncase_l-nonascii > +sysdep_routines += \ > + strcasecmp_l-nonascii \ > + strcspn-generic \ > + strncase_l-nonascii \ > + strpbrk-generic \ > + strspn-generic \ > + varshift \ > +# sysdep_routines > gen-as-const-headers += locale-defines.sym > tests += \ > tst-rsi-strlen > diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c > index 9e07283f86..b84acfead2 100644 > --- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c > +++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c > @@ -533,6 +533,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, > > /* Support sysdeps/x86_64/multiarch/strcspn.c. */ > IFUNC_IMPL (i, name, strcspn, > + /* All implementations of strcspn are built at all ISA > + levels. */ > IFUNC_IMPL_ADD (array, i, strcspn, CPU_FEATURE_USABLE (SSE4_2), > __strcspn_sse42) > IFUNC_IMPL_ADD (array, i, strcspn, 1, __strcspn_generic)) > @@ -609,6 +611,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, > > /* Support sysdeps/x86_64/multiarch/strpbrk.c. */ > IFUNC_IMPL (i, name, strpbrk, > + /* All implementations of strpbrk are built at all ISA > + levels. */ > IFUNC_IMPL_ADD (array, i, strpbrk, CPU_FEATURE_USABLE (SSE4_2), > __strpbrk_sse42) > IFUNC_IMPL_ADD (array, i, strpbrk, 1, __strpbrk_generic)) > @@ -616,6 +620,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, > > /* Support sysdeps/x86_64/multiarch/strspn.c. */ > IFUNC_IMPL (i, name, strspn, > + /* All implementations of strspn are built at all ISA > + levels. */ > IFUNC_IMPL_ADD (array, i, strspn, CPU_FEATURE_USABLE (SSE4_2), > __strspn_sse42) > IFUNC_IMPL_ADD (array, i, strspn, 1, __strspn_generic)) > diff --git a/sysdeps/x86_64/multiarch/ifunc-sse4_2.h b/sysdeps/x86_64/multiarch/ifunc-sse4_2.h > index 752798278c..9baf1bc1b3 100644 > --- a/sysdeps/x86_64/multiarch/ifunc-sse4_2.h > +++ b/sysdeps/x86_64/multiarch/ifunc-sse4_2.h > @@ -31,7 +31,7 @@ IFUNC_SELECTOR (void) > there is no other optimized implementation keep using it. If an > optimized fallback is added add a X86_ISA_CPU_FEATURE_ARCH_P > (cpu_features, Slow_SSE4_2) check. */ > - if (CPU_FEATURE_USABLE_P (cpu_features, SSE4_2)) > + if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, SSE4_2)) > return OPTIMIZE (sse42); > > return OPTIMIZE (generic); > diff --git a/sysdeps/x86_64/multiarch/rtld-strcspn.c b/sysdeps/x86_64/multiarch/rtld-strcspn.c > new file mode 100644 > index 0000000000..99e3c59e00 > --- /dev/null > +++ b/sysdeps/x86_64/multiarch/rtld-strcspn.c > @@ -0,0 +1,18 @@ > +/* Copyright (C) 2022 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 "../strcspn.c" > diff --git a/sysdeps/x86_64/multiarch/strcspn-generic.c b/sysdeps/x86_64/multiarch/strcspn-generic.c > index 423de2e2b2..86cda7b037 100644 > --- a/sysdeps/x86_64/multiarch/strcspn-generic.c > +++ b/sysdeps/x86_64/multiarch/strcspn-generic.c > @@ -16,8 +16,10 @@ > License along with the GNU C Library; if not, see > . */ > > -#if IS_IN (libc) > - > +/* We always need to build this implementation as strcspn-sse4 needs > + to be able to fallback to it. */ > +#include > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > # include > # define STRCSPN __strcspn_generic > > diff --git a/sysdeps/x86_64/multiarch/strcspn-sse4.c b/sysdeps/x86_64/multiarch/strcspn-sse4.c > index d11e87ab6c..873a416cef 100644 > --- a/sysdeps/x86_64/multiarch/strcspn-sse4.c > +++ b/sysdeps/x86_64/multiarch/strcspn-sse4.c > @@ -16,7 +16,8 @@ > License along with the GNU C Library; if not, see > . */ > > -#if IS_IN (libc) > +#include > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > > # include > # include > @@ -54,9 +55,11 @@ > when either CFlag or ZFlag is 1. If CFlag == 1, ECX has the offset > X for case 1. */ > > +# ifndef STRCSPN > +# define STRCSPN __strcspn_sse42 > +# endif > # ifndef STRCSPN_GENERIC > # define STRCSPN_GENERIC __strcspn_generic > -# define STRCSPN_SSE42 __strcspn_sse42 > # endif > > # ifdef USE_AS_STRPBRK > @@ -80,7 +83,7 @@ char * > size_t > # endif > __attribute__ ((section (".text.sse4.2"))) > -STRCSPN_SSE42 (const char *s, const char *a) > +STRCSPN (const char *s, const char *a) > { > if (*a == 0) > RETURN (NULL, strlen (s)); > diff --git a/sysdeps/x86_64/multiarch/strpbrk-generic.c b/sysdeps/x86_64/multiarch/strpbrk-generic.c > index d31acfe495..058f635774 100644 > --- a/sysdeps/x86_64/multiarch/strpbrk-generic.c > +++ b/sysdeps/x86_64/multiarch/strpbrk-generic.c > @@ -16,8 +16,11 @@ > License along with the GNU C Library; if not, see > . */ > > -#if IS_IN (libc) > > +/* We always need to build this implementation as strpbrk-sse4 needs > + to be able to fallback to it. */ > +#include > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > # include > # define STRPBRK __strpbrk_generic > > diff --git a/sysdeps/x86_64/multiarch/strpbrk-sse4.c b/sysdeps/x86_64/multiarch/strpbrk-sse4.c > index bf74d660d5..0adb577955 100644 > --- a/sysdeps/x86_64/multiarch/strpbrk-sse4.c > +++ b/sysdeps/x86_64/multiarch/strpbrk-sse4.c > @@ -16,7 +16,11 @@ > License along with the GNU C Library; if not, see > . */ > > +#ifndef STRPBRK > +# define STRPBRK __strpbrk_sse42 > +#endif > + > #define USE_AS_STRPBRK > #define STRCSPN_GENERIC __strpbrk_generic > -#define STRCSPN_SSE42 __strpbrk_sse42 > +#define STRCSPN STRPBRK > #include "strcspn-sse4.c" > diff --git a/sysdeps/x86_64/multiarch/strspn-generic.c b/sysdeps/x86_64/multiarch/strspn-generic.c > index 6b50c36432..0f485ab4da 100644 > --- a/sysdeps/x86_64/multiarch/strspn-generic.c > +++ b/sysdeps/x86_64/multiarch/strspn-generic.c > @@ -16,13 +16,16 @@ > License along with the GNU C Library; if not, see > . */ > > -#if IS_IN (libc) > - > +/* We always need to build this implementation as strspn-sse4 needs to > + be able to fallback to it. */ > +#include > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > # include > # define STRSPN __strspn_generic > > # undef libc_hidden_builtin_def > # define libc_hidden_builtin_def(STRSPN) > + > #endif > > #include > diff --git a/sysdeps/x86_64/multiarch/strspn-sse4.c b/sysdeps/x86_64/multiarch/strspn-sse4.c > index d044916688..4d50507a0d 100644 > --- a/sysdeps/x86_64/multiarch/strspn-sse4.c > +++ b/sysdeps/x86_64/multiarch/strspn-sse4.c > @@ -53,10 +53,13 @@ > > extern size_t __strspn_generic (const char *, const char *) attribute_hidden; > > +#ifndef STRSPN > +# define STRSPN __strspn_sse42 > +#endif > > size_t > __attribute__ ((section (".text.sse4.2"))) > -__strspn_sse42 (const char *s, const char *a) > +STRSPN (const char *s, const char *a) > { > if (*a == 0) > return 0; > diff --git a/sysdeps/x86_64/multiarch/varshift.c b/sysdeps/x86_64/multiarch/varshift.c > index 5e2f2bdf51..a98311d749 100644 > --- a/sysdeps/x86_64/multiarch/varshift.c > +++ b/sysdeps/x86_64/multiarch/varshift.c > @@ -16,7 +16,9 @@ > License along with the GNU C Library; if not, see > . */ > > -#if IS_IN (libc) > +#include > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > + > # include > > const int8_t ___m128i_shift_right[31] attribute_hidden > diff --git a/sysdeps/x86_64/strcspn-generic.c b/sysdeps/x86_64/strcspn-generic.c > new file mode 100644 > index 0000000000..51fd70b63d > --- /dev/null > +++ b/sysdeps/x86_64/strcspn-generic.c > @@ -0,0 +1,25 @@ > +/* Hook for build strcspn-generic for non-multiarch build. Needed for > + the ISA level >= 2 because strcspn-sse4 has a dependency on > + strcspn-generic. > + Copyright (C) 2022 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 > + > +#if MINIMUM_X86_ISA_LEVEL >= 2 > +# include "multiarch/strcspn-generic.c" > +#endif > diff --git a/sysdeps/x86_64/strcspn.c b/sysdeps/x86_64/strcspn.c > new file mode 100644 > index 0000000000..cd54eed869 > --- /dev/null > +++ b/sysdeps/x86_64/strcspn.c > @@ -0,0 +1,27 @@ > +/* strcspn hook for non-multiarch and RTLD build. > + Copyright (C) 2022 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 > + > +#if MINIMUM_X86_ISA_LEVEL == 1 > +#include > +#else > +#define STRCSPN strcspn > +#include "multiarch/strcspn-sse4.c" > +libc_hidden_builtin_def (strcspn) > +#endif > diff --git a/sysdeps/x86_64/strpbrk-generic.c b/sysdeps/x86_64/strpbrk-generic.c > new file mode 100644 > index 0000000000..a7d8b11216 > --- /dev/null > +++ b/sysdeps/x86_64/strpbrk-generic.c > @@ -0,0 +1,25 @@ > +/* Hook for build strpbrk-generic for non-multiarch build. Needed for > + the ISA level >= 2 because strpbrk-sse4 has a dependency on > + strpbrk-generic. > + Copyright (C) 2022 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 > + > +#if MINIMUM_X86_ISA_LEVEL >= 2 > +# include "multiarch/strpbrk-generic.c" > +#endif > diff --git a/sysdeps/x86_64/strpbrk.c b/sysdeps/x86_64/strpbrk.c > new file mode 100644 > index 0000000000..e7ea1b334a > --- /dev/null > +++ b/sysdeps/x86_64/strpbrk.c > @@ -0,0 +1,27 @@ > +/* strpbrk hook for non-multiarch and RTLD build. > + Copyright (C) 2022 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 > + > +#if MINIMUM_X86_ISA_LEVEL == 1 > +#include > +#else > +#define STRPBRK strpbrk > +#include "multiarch/strpbrk-sse4.c" > +libc_hidden_builtin_def (strpbrk) > +#endif > diff --git a/sysdeps/x86_64/strspn-generic.c b/sysdeps/x86_64/strspn-generic.c > new file mode 100644 > index 0000000000..1a2a576e49 > --- /dev/null > +++ b/sysdeps/x86_64/strspn-generic.c > @@ -0,0 +1,26 @@ > +/* Hook for build strspn-generic for non-multiarch build. Needed for > + the ISA level >= 2 because strspn-sse4 has a dependency on > + strspn-generic. > + Copyright (C) 2022 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 > + > +#if MINIMUM_X86_ISA_LEVEL >= 2 > +# include "multiarch/strspn-generic.c" > +#endif > diff --git a/sysdeps/x86_64/strspn.c b/sysdeps/x86_64/strspn.c > new file mode 100644 > index 0000000000..7b9ede26d9 > --- /dev/null > +++ b/sysdeps/x86_64/strspn.c > @@ -0,0 +1,27 @@ > +/* strspn hook for non-multiarch and RTLD build. > + Copyright (C) 2022 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 > + > +#if MINIMUM_X86_ISA_LEVEL == 1 > +#include > +#else > +#define STRSPN strspn > +#include "multiarch/strspn-sse4.c" > +libc_hidden_builtin_def (strspn) > +#endif > diff --git a/sysdeps/x86_64/varshift.c b/sysdeps/x86_64/varshift.c > new file mode 100644 > index 0000000000..8f9eb13547 > --- /dev/null > +++ b/sysdeps/x86_64/varshift.c > @@ -0,0 +1,26 @@ > +/* Hook for build varshift for non-multiarch build. Needed for the > + ISA level >= 2 because strspn-sse4, strcspn-sse4, and strpbrk-sse4 > + all have a dependency on varshift.c. > + Copyright (C) 2022 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 > + > +#if MINIMUM_X86_ISA_LEVEL >= 2 > +# include "multiarch/varshift.c" > +#endif > -- > 2.34.1 > LGTM. Thanks. -- H.J.