File 0009-S390-Add-z13-strstr-ifunc-variant.patch of Package glibc.15734
From 104e479d5a0402a6f8b47cf3491211eb9607a4b3 Mon Sep 17 00:00:00 2001 From: Stefan Liebler <stli@linux.ibm.com> Date: Tue, 18 Dec 2018 13:57:09 +0100 Subject: [PATCH 09/18] S390: Add z13 strstr ifunc variant. The new vector variant of strstr is using the common code implementation, but instead of calling the default str* / mem* functions, the vector variants are called. ChangeLog: * sysdeps/s390/Makefile (sysdep_routines): Add strstr variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc variants for strstr. * sysdeps/s390/ifunc-strstr.h: New file. * sysdeps/s390/strstr.c: Likewise. * sysdeps/s390/strstr-c.c: Likewise. * sysdeps/s390/strstr-vx.c: Likewise. (cherry picked from commit 8c25dddd2e32bce47dfe01ca51c8aab535dbe23d) --- sysdeps/s390/Makefile | 3 +- sysdeps/s390/ifunc-strstr.h | 52 ++++++++++++++++++++++++++++++++ sysdeps/s390/multiarch/ifunc-impl-list.c | 13 ++++++++ sysdeps/s390/strstr-c.c | 32 ++++++++++++++++++++ sysdeps/s390/strstr-vx.c | 52 ++++++++++++++++++++++++++++++++ sysdeps/s390/strstr.c | 40 ++++++++++++++++++++++++ 6 files changed, 191 insertions(+), 1 deletion(-) create mode 100644 sysdeps/s390/ifunc-strstr.h create mode 100644 sysdeps/s390/strstr-c.c create mode 100644 sysdeps/s390/strstr-vx.c create mode 100644 sysdeps/s390/strstr.c Index: glibc-2.26/sysdeps/s390/Makefile =================================================================== --- glibc-2.26.orig/sysdeps/s390/Makefile +++ glibc-2.26/sysdeps/s390/Makefile @@ -32,5 +32,6 @@ endif ifeq ($(subdir),string) sysdep_routines += mempcpy memcpy memcpy-z900 \ - memmove memmove-c + memmove memmove-c \ + strstr strstr-vx strstr-c endif Index: glibc-2.26/sysdeps/s390/ifunc-strstr.h =================================================================== --- /dev/null +++ glibc-2.26/sysdeps/s390/ifunc-strstr.h @@ -0,0 +1,52 @@ +/* strstr variant information on S/390 version. + Copyright (C) 2018 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 + <http://www.gnu.org/licenses/>. */ + +#if defined USE_MULTIARCH && IS_IN (libc) \ + && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT +# define HAVE_STRSTR_IFUNC 1 +#else +# define HAVE_STRSTR_IFUNC 0 +#endif + +#ifdef HAVE_S390_VX_ASM_SUPPORT +# define HAVE_STRSTR_IFUNC_AND_VX_SUPPORT HAVE_STRSTR_IFUNC +#else +# define HAVE_STRSTR_IFUNC_AND_VX_SUPPORT 0 +#endif + +#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT +# define STRSTR_DEFAULT STRSTR_Z13 +# define HAVE_STRSTR_C 0 +# define HAVE_STRSTR_Z13 1 +#else +# define STRSTR_DEFAULT STRSTR_C +# define HAVE_STRSTR_C 1 +# define HAVE_STRSTR_Z13 HAVE_STRSTR_IFUNC_AND_VX_SUPPORT +#endif + +#if HAVE_STRSTR_C +# define STRSTR_C __strstr_c +#else +# define STRSTR_C NULL +#endif + +#if HAVE_STRSTR_Z13 +# define STRSTR_Z13 __strstr_vx +#else +# define STRSTR_Z13 NULL +#endif Index: glibc-2.26/sysdeps/s390/multiarch/ifunc-impl-list.c =================================================================== --- glibc-2.26.orig/sysdeps/s390/multiarch/ifunc-impl-list.c +++ glibc-2.26/sysdeps/s390/multiarch/ifunc-impl-list.c @@ -22,6 +22,7 @@ #include <ifunc-impl-list.h> #include <ifunc-resolve.h> #include <ifunc-memcpy.h> +#include <ifunc-strstr.h> /* Maximum number of IFUNC implementations. */ #define MAX_IFUNC 3 @@ -103,6 +104,18 @@ __libc_ifunc_impl_list (const char *name ) #endif /* HAVE_MEMMOVE_IFUNC */ +#if HAVE_STRSTR_IFUNC + IFUNC_IMPL (i, name, strstr, +# if HAVE_STRSTR_Z13 + IFUNC_IMPL_ADD (array, i, strstr, + dl_hwcap & HWCAP_S390_VX, STRSTR_Z13) +# endif +# if HAVE_STRSTR_C + IFUNC_IMPL_ADD (array, i, strstr, 1, STRSTR_C) +# endif + ) +#endif /* HAVE_STRSTR_IFUNC */ + #ifdef HAVE_S390_VX_ASM_SUPPORT # define IFUNC_VX_IMPL(FUNC) \ Index: glibc-2.26/sysdeps/s390/strstr-c.c =================================================================== --- /dev/null +++ glibc-2.26/sysdeps/s390/strstr-c.c @@ -0,0 +1,32 @@ +/* Default strstr implementation for S/390. + Copyright (C) 2018 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 + <http://www.gnu.org/licenses/>. */ + +#include <ifunc-strstr.h> + +#if HAVE_STRSTR_C +# if HAVE_STRSTR_IFUNC +# define STRSTR STRSTR_C +# if defined SHARED && IS_IN (libc) +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(name) \ + __hidden_ver1 (__strstr_c, __GI_strstr, __strstr_c); +# endif +# endif + +# include <string/strstr.c> +#endif Index: glibc-2.26/sysdeps/s390/strstr-vx.c =================================================================== --- /dev/null +++ glibc-2.26/sysdeps/s390/strstr-vx.c @@ -0,0 +1,52 @@ +/* Default strstr implementation with vector string functions for S/390. + Copyright (C) 2018 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 + <http://www.gnu.org/licenses/>. */ + +#include <ifunc-strstr.h> + +#if HAVE_STRSTR_Z13 +# if HAVE_STRSTR_IFUNC +# define STRSTR STRSTR_Z13 +# if defined SHARED && IS_IN (libc) +# undef libc_hidden_builtin_def +# if HAVE_STRSTR_C +# define libc_hidden_builtin_def(name) +# else +# define libc_hidden_builtin_def(name) \ + __hidden_ver1 (__strstr_vx, __GI_strstr, __strstr_vx); +# endif +# endif +# endif + +# include <string.h> + +# ifdef USE_MULTIARCH +extern __typeof (strchr) __strchr_vx attribute_hidden; +# define strchr __strchr_vx + +extern __typeof (strlen) __strlen_vx attribute_hidden; +# define strlen __strlen_vx + +extern __typeof (__strnlen) __strnlen_vx attribute_hidden; +# define __strnlen __strnlen_vx + +extern __typeof (memcmp) __memcmp_z196 attribute_hidden; +# define memcmp __memcmp_z196 +# endif + +# include <string/strstr.c> +#endif Index: glibc-2.26/sysdeps/s390/strstr.c =================================================================== --- /dev/null +++ glibc-2.26/sysdeps/s390/strstr.c @@ -0,0 +1,40 @@ +/* Multiple versions of strstr. + Copyright (C) 2018 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 + <http://www.gnu.org/licenses/>. */ + +#include <ifunc-strstr.h> + +#if HAVE_STRSTR_IFUNC +# define strstr __redirect_strstr +# include <string.h> +# include <ifunc-resolve.h> +# undef strstr + +# if HAVE_STRSTR_C +extern __typeof (__redirect_strstr) STRSTR_C attribute_hidden; +# endif + +# if HAVE_STRSTR_Z13 +extern __typeof (__redirect_strstr) STRSTR_Z13 attribute_hidden; +# endif + +s390_libc_ifunc_expr (__redirect_strstr, strstr, + (HAVE_STRSTR_Z13 && (hwcap & HWCAP_S390_VX)) + ? STRSTR_Z13 + : STRSTR_DEFAULT + ) +#endif
