| Message ID | 20220630201319.3777218-2-goldstein.w.n@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v6,1/2] x86: Add comment explaining no Slow_SSE4_2 check in ifunc-sse4_2 | expand |
On Thu, Jun 30, 2022 at 1:13 PM Noah Goldstein <goldstein.w.n@gmail.com> 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 > + <https://www.gnu.org/licenses/>. */ > + > +#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 > <https://www.gnu.org/licenses/>. */ > > -#if IS_IN (libc) > - > +/* We always need to build this implementation as strcspn-sse4 needs > + to be able to fallback to it. */ > +#include <isa-level.h> > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > # include <sysdep.h> > # 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 > <https://www.gnu.org/licenses/>. */ > > -#if IS_IN (libc) > +#include <isa-level.h> > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > > # include <nmmintrin.h> > # include <string.h> > @@ -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 > <https://www.gnu.org/licenses/>. */ > > -#if IS_IN (libc) > > +/* We always need to build this implementation as strpbrk-sse4 needs > + to be able to fallback to it. */ > +#include <isa-level.h> > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > # include <sysdep.h> > # 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 > <https://www.gnu.org/licenses/>. */ > > +#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 > <https://www.gnu.org/licenses/>. */ > > -#if IS_IN (libc) > - > +/* We always need to build this implementation as strspn-sse4 needs to > + be able to fallback to it. */ > +#include <isa-level.h> > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > # include <sysdep.h> > # define STRSPN __strspn_generic > > # undef libc_hidden_builtin_def > # define libc_hidden_builtin_def(STRSPN) > + > #endif > > #include <string/strspn.c> > 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 > <https://www.gnu.org/licenses/>. */ > > -#if IS_IN (libc) > +#include <isa-level.h> > +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 > + > # include <stdint.h> > > 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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <isa-level.h> > + > +#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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <isa-level.h> > + > +#if MINIMUM_X86_ISA_LEVEL == 1 > +#include <string/strcspn.c> > +#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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <isa-level.h> > + > +#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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <isa-level.h> > + > +#if MINIMUM_X86_ISA_LEVEL == 1 > +#include <string/strpbrk.c> > +#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 > + <https://www.gnu.org/licenses/>. */ > + > + > +#include <isa-level.h> > + > +#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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <isa-level.h> > + > +#if MINIMUM_X86_ISA_LEVEL == 1 > +#include <string/strspn.c> > +#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 > + <https://www.gnu.org/licenses/>. */ > + > + > +#include <isa-level.h> > + > +#if MINIMUM_X86_ISA_LEVEL >= 2 > +# include "multiarch/varshift.c" > +#endif > -- > 2.34.1 > LGTM. Thanks.
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 + <https://www.gnu.org/licenses/>. */ + +#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 <https://www.gnu.org/licenses/>. */ -#if IS_IN (libc) - +/* We always need to build this implementation as strcspn-sse4 needs + to be able to fallback to it. */ +#include <isa-level.h> +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 # include <sysdep.h> # 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 <https://www.gnu.org/licenses/>. */ -#if IS_IN (libc) +#include <isa-level.h> +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 # include <nmmintrin.h> # include <string.h> @@ -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 <https://www.gnu.org/licenses/>. */ -#if IS_IN (libc) +/* We always need to build this implementation as strpbrk-sse4 needs + to be able to fallback to it. */ +#include <isa-level.h> +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 # include <sysdep.h> # 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 <https://www.gnu.org/licenses/>. */ +#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 <https://www.gnu.org/licenses/>. */ -#if IS_IN (libc) - +/* We always need to build this implementation as strspn-sse4 needs to + be able to fallback to it. */ +#include <isa-level.h> +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 # include <sysdep.h> # define STRSPN __strspn_generic # undef libc_hidden_builtin_def # define libc_hidden_builtin_def(STRSPN) + #endif #include <string/strspn.c> 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 <https://www.gnu.org/licenses/>. */ -#if IS_IN (libc) +#include <isa-level.h> +#if IS_IN (libc) || MINIMUM_X86_ISA_LEVEL >= 2 + # include <stdint.h> 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 + <https://www.gnu.org/licenses/>. */ + +#include <isa-level.h> + +#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 + <https://www.gnu.org/licenses/>. */ + +#include <isa-level.h> + +#if MINIMUM_X86_ISA_LEVEL == 1 +#include <string/strcspn.c> +#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 + <https://www.gnu.org/licenses/>. */ + +#include <isa-level.h> + +#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 + <https://www.gnu.org/licenses/>. */ + +#include <isa-level.h> + +#if MINIMUM_X86_ISA_LEVEL == 1 +#include <string/strpbrk.c> +#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 + <https://www.gnu.org/licenses/>. */ + + +#include <isa-level.h> + +#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 + <https://www.gnu.org/licenses/>. */ + +#include <isa-level.h> + +#if MINIMUM_X86_ISA_LEVEL == 1 +#include <string/strspn.c> +#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 + <https://www.gnu.org/licenses/>. */ + + +#include <isa-level.h> + +#if MINIMUM_X86_ISA_LEVEL >= 2 +# include "multiarch/varshift.c" +#endif
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