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glibc/SOURCES/glibc-rh1659438-47.patch

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commit c09c1b6f014a45f6c4ba189f5ae94b1fb1a2982a
Author: Stefan Liebler <stli@linux.ibm.com>
Date: Tue Dec 18 13:57:22 2018 +0100
S390: Refactor wcschrnul ifunc handling.
The ifunc handling for wcschrnul is adjusted in order to omit ifunc
if the minimum architecture level already supports newer CPUs by default.
Unfortunately the c ifunc variant can't be omitted at all as it is used
by the z13 ifunc variant as fallback if the pointers are not 4-byte aligned.
ChangeLog:
* sysdeps/s390/multiarch/Makefile
(sysdep_routines): Remove wcschrnul variants.
* sysdeps/s390/Makefile (sysdep_routines): Add wcschrnul variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Refactor ifunc handling for wcschrnul.
* sysdeps/s390/multiarch/wcschrnul-c.c: Move to ...
* sysdeps/s390/wcschrnul-c.c: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcschrnul-vx.S: Move to ...
* sysdeps/s390/wcschrnul-vx.S: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcschrnul.c: Move to ...
* sysdeps/s390/wcschrnul.c: ... here and adjust ifunc handling.
* sysdeps/s390/ifunc-wcschrnul.h: New file.
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 91ee84a54b713e4a..a6ebf11ad1913cc4 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -70,5 +70,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
wcsncat wcsncat-vx wcsncat-c \
wcscmp wcscmp-vx wcscmp-c \
wcsncmp wcsncmp-vx wcsncmp-c \
- wcschr wcschr-vx wcschr-c
+ wcschr wcschr-vx wcschr-c \
+ wcschrnul wcschrnul-vx wcschrnul-c
endif
diff --git a/sysdeps/s390/ifunc-wcschrnul.h b/sysdeps/s390/ifunc-wcschrnul.h
new file mode 100644
index 0000000000000000..39d4120eb3cfafdf
--- /dev/null
+++ b/sysdeps/s390/ifunc-wcschrnul.h
@@ -0,0 +1,53 @@
+/* wcschrnul 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_WCSCHRNUL_IFUNC 1
+#else
+# define HAVE_WCSCHRNUL_IFUNC 0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_WCSCHRNUL_IFUNC_AND_VX_SUPPORT HAVE_WCSCHRNUL_IFUNC
+#else
+# define HAVE_WCSCHRNUL_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define WCSCHRNUL_DEFAULT WCSCHRNUL_Z13
+/* The z13 ifunc variant is using the common code variant as fallback! */
+# define HAVE_WCSCHRNUL_C 1
+# define HAVE_WCSCHRNUL_Z13 1
+#else
+# define WCSCHRNUL_DEFAULT WCSCHRNUL_C
+# define HAVE_WCSCHRNUL_C 1
+# define HAVE_WCSCHRNUL_Z13 HAVE_WCSCHRNUL_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_WCSCHRNUL_C
+# define WCSCHRNUL_C __wcschrnul_c
+#else
+# define WCSCHRNUL_C NULL
+#endif
+
+#if HAVE_WCSCHRNUL_Z13
+# define WCSCHRNUL_Z13 __wcschrnul_vx
+#else
+# define WCSCHRNUL_Z13 NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index b282613b4705bb14..0eb01d5d84c60408 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcschrnul wcschrnul-vx wcschrnul-c \
- wcsrchr wcsrchr-vx wcsrchr-c \
+sysdep_routines += wcsrchr wcsrchr-vx wcsrchr-c \
wcsspn wcsspn-vx wcsspn-c \
wcspbrk wcspbrk-vx wcspbrk-c \
wcscspn wcscspn-vx wcscspn-c \
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index c69165465dc97111..553a76c39ecc87ae 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -57,6 +57,7 @@
#include <ifunc-wcscmp.h>
#include <ifunc-wcsncmp.h>
#include <ifunc-wcschr.h>
+#include <ifunc-wcschrnul.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -567,6 +568,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
)
#endif /* HAVE_WCSCHR_IFUNC */
+#if HAVE_WCSCHRNUL_IFUNC
+ IFUNC_IMPL (i, name, wcschrnul,
+# if HAVE_WCSCHRNUL_Z13
+ IFUNC_IMPL_ADD (array, i, wcschrnul,
+ dl_hwcap & HWCAP_S390_VX, WCSCHRNUL_Z13)
+# endif
+# if HAVE_WCSCHRNUL_C
+ IFUNC_IMPL_ADD (array, i, wcschrnul, 1, WCSCHRNUL_C)
+# endif
+ )
+#endif /* HAVE_WCSCHRNUL_IFUNC */
+
#ifdef HAVE_S390_VX_ASM_SUPPORT
# define IFUNC_VX_IMPL(FUNC) \
@@ -575,8 +588,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
__##FUNC##_vx) \
IFUNC_IMPL_ADD (array, i, FUNC, 1, __##FUNC##_c))
- IFUNC_VX_IMPL (wcschrnul);
-
IFUNC_VX_IMPL (wcsrchr);
IFUNC_VX_IMPL (wcsspn);
diff --git a/sysdeps/s390/multiarch/wcschrnul-c.c b/sysdeps/s390/wcschrnul-c.c
similarity index 85%
rename from sysdeps/s390/multiarch/wcschrnul-c.c
rename to sysdeps/s390/wcschrnul-c.c
index 00e776a3adc11e67..410cee1399a67914 100644
--- a/sysdeps/s390/multiarch/wcschrnul-c.c
+++ b/sysdeps/s390/wcschrnul-c.c
@@ -16,10 +16,12 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
-# define WCSCHRNUL __wcschrnul_c
+#include <ifunc-wcschrnul.h>
+
+#if HAVE_WCSCHRNUL_C
+# if HAVE_WCSCHRNUL_IFUNC || HAVE_WCSCHRNUL_Z13
+# define WCSCHRNUL WCSCHRNUL_C
+# endif
-# include <wchar.h>
-extern __typeof (__wcschrnul) __wcschrnul_c;
# include <wcsmbs/wcschrnul.c>
#endif
diff --git a/sysdeps/s390/multiarch/wcschrnul-vx.S b/sysdeps/s390/wcschrnul-vx.S
similarity index 92%
rename from sysdeps/s390/multiarch/wcschrnul-vx.S
rename to sysdeps/s390/wcschrnul-vx.S
index ebcd32b8703608d6..4ffb937c6bbd7008 100644
--- a/sysdeps/s390/multiarch/wcschrnul-vx.S
+++ b/sysdeps/s390/wcschrnul-vx.S
@@ -16,7 +16,8 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+#include <ifunc-wcschrnul.h>
+#if HAVE_WCSCHRNUL_Z13
# include "sysdep.h"
# include "asm-syntax.h"
@@ -35,7 +36,7 @@
-v16=part of s
-v18=vector with c replicated in every byte
*/
-ENTRY(__wcschrnul_vx)
+ENTRY(WCSCHRNUL_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
@@ -92,6 +93,11 @@ ENTRY(__wcschrnul_vx)
.Lend:
br %r14
.Lfallback:
- jg __wcschrnul_c
-END(__wcschrnul_vx)
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+ jg WCSCHRNUL_C
+END(WCSCHRNUL_Z13)
+
+# if ! HAVE_WCSCHRNUL_IFUNC
+strong_alias (WCSCHRNUL_Z13, __wcschrnul)
+weak_alias (__wcschrnul, wcschrnul)
+# endif
+#endif
diff --git a/sysdeps/s390/multiarch/wcschrnul.c b/sysdeps/s390/wcschrnul.c
similarity index 68%
rename from sysdeps/s390/multiarch/wcschrnul.c
rename to sysdeps/s390/wcschrnul.c
index 807d7ee08963a601..ab5aaf04020bb571 100644
--- a/sysdeps/s390/multiarch/wcschrnul.c
+++ b/sysdeps/s390/wcschrnul.c
@@ -16,13 +16,24 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+#include <ifunc-wcschrnul.h>
+
+#if HAVE_WCSCHRNUL_IFUNC
# include <wchar.h>
# include <ifunc-resolve.h>
-s390_vx_libc_ifunc (__wcschrnul)
-weak_alias (__wcschrnul, wcschrnul)
+# if HAVE_WCSCHRNUL_C
+extern __typeof (__wcschrnul) WCSCHRNUL_C attribute_hidden;
+# endif
-#else
-# include <wcsmbs/wcschrnul.c>
-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
+# if HAVE_WCSCHRNUL_Z13
+extern __typeof (__wcschrnul) WCSCHRNUL_Z13 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__wcschrnul, __wcschrnul,
+ (HAVE_WCSCHRNUL_Z13 && (hwcap & HWCAP_S390_VX))
+ ? WCSCHRNUL_Z13
+ : WCSCHRNUL_DEFAULT
+ )
+weak_alias (__wcschrnul, wcschrnul)
+#endif
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