File 0009-S390-Add-z13-strstr-ifunc-variant.patch of Package glibc

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File 0009-S390-Add-z13-strstr-ifunc-variant.patch of Package glibc (Revision 42b6186f8fc091f7f170ccc49da0a72f)

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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

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File 0009-S390-Add-z13-strstr-ifunc-variant.patch of Package glibc (Revision 42b6186f8fc091f7f170ccc49da0a72f)

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