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glibc/SOURCES/glibc-rh1659438-51.patch

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commit 79b44cf61115bd48006227bb325b709f294c56f9
Author: Stefan Liebler <stli@linux.ibm.com>
Date: Tue Dec 18 13:57:23 2018 +0100
S390: Refactor wcscspn ifunc handling.
The ifunc handling for wcscspn 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 wcscspn variants.
* sysdeps/s390/Makefile (sysdep_routines): Add wcscspn variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Refactor ifunc handling for wcscspn.
* sysdeps/s390/multiarch/wcscspn-c.c: Move to ...
* sysdeps/s390/wcscspn-c.c: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcscspn-vx.S: Move to ...
* sysdeps/s390/wcscspn-vx.S: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcscspn.c: Move to ...
* sysdeps/s390/wcscspn.c: ... here and adjust ifunc handling.
* sysdeps/s390/ifunc-wcscspn.h: New file.
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index af595050d43c63ed..da96ac3a36bd7f4e 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -74,5 +74,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
wcschrnul wcschrnul-vx wcschrnul-c \
wcsrchr wcsrchr-vx wcsrchr-c \
wcsspn wcsspn-vx wcsspn-c \
- wcspbrk wcspbrk-vx wcspbrk-c
+ wcspbrk wcspbrk-vx wcspbrk-c \
+ wcscspn wcscspn-vx wcscspn-c
endif
diff --git a/sysdeps/s390/ifunc-wcscspn.h b/sysdeps/s390/ifunc-wcscspn.h
new file mode 100644
index 0000000000000000..23f3667ba3823e99
--- /dev/null
+++ b/sysdeps/s390/ifunc-wcscspn.h
@@ -0,0 +1,53 @@
+/* wcscspn 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_WCSCSPN_IFUNC 1
+#else
+# define HAVE_WCSCSPN_IFUNC 0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_WCSCSPN_IFUNC_AND_VX_SUPPORT HAVE_WCSCSPN_IFUNC
+#else
+# define HAVE_WCSCSPN_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define WCSCSPN_DEFAULT WCSCSPN_Z13
+/* The z13 ifunc variant is using the common code variant as fallback! */
+# define HAVE_WCSCSPN_C 1
+# define HAVE_WCSCSPN_Z13 1
+#else
+# define WCSCSPN_DEFAULT WCSCSPN_C
+# define HAVE_WCSCSPN_C 1
+# define HAVE_WCSCSPN_Z13 HAVE_WCSCSPN_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_WCSCSPN_C
+# define WCSCSPN_C __wcscspn_c
+#else
+# define WCSCSPN_C NULL
+#endif
+
+#if HAVE_WCSCSPN_Z13
+# define WCSCSPN_Z13 __wcscspn_vx
+#else
+# define WCSCSPN_Z13 NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index e1e2d9dc7495ebdc..5be635542361b355 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcscspn wcscspn-vx wcscspn-c \
- wmemchr wmemchr-vx wmemchr-c \
+sysdep_routines += wmemchr wmemchr-vx wmemchr-c \
wmemset wmemset-vx wmemset-c \
wmemcmp wmemcmp-vx wmemcmp-c
endif
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index 89d6e8ad7e323fec..7d8031a069bd23ba 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -61,6 +61,7 @@
#include <ifunc-wcsrchr.h>
#include <ifunc-wcsspn.h>
#include <ifunc-wcspbrk.h>
+#include <ifunc-wcscspn.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -619,6 +620,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
)
#endif /* HAVE_WCSPBRK_IFUNC */
+#if HAVE_WCSCSPN_IFUNC
+ IFUNC_IMPL (i, name, wcscspn,
+# if HAVE_WCSCSPN_Z13
+ IFUNC_IMPL_ADD (array, i, wcscspn,
+ dl_hwcap & HWCAP_S390_VX, WCSCSPN_Z13)
+# endif
+# if HAVE_WCSCSPN_C
+ IFUNC_IMPL_ADD (array, i, wcscspn, 1, WCSCSPN_C)
+# endif
+ )
+#endif /* HAVE_WCSCSPN_IFUNC */
+
#ifdef HAVE_S390_VX_ASM_SUPPORT
# define IFUNC_VX_IMPL(FUNC) \
@@ -627,8 +640,6 @@ __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 (wcscspn);
-
IFUNC_VX_IMPL (wmemchr);
IFUNC_VX_IMPL (wmemset);
diff --git a/sysdeps/s390/multiarch/wcscspn-c.c b/sysdeps/s390/wcscspn-c.c
similarity index 86%
rename from sysdeps/s390/multiarch/wcscspn-c.c
rename to sysdeps/s390/wcscspn-c.c
index 161e52e686c73907..d47cb6b75be14e14 100644
--- a/sysdeps/s390/multiarch/wcscspn-c.c
+++ b/sysdeps/s390/wcscspn-c.c
@@ -16,11 +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 WCSCSPN __wcscspn_c
+#include <ifunc-wcscspn.h>
-# include <wchar.h>
-extern __typeof (wcscspn) __wcscspn_c;
+#if HAVE_WCSCSPN_C
+# if HAVE_WCSCSPN_IFUNC || HAVE_WCSCSPN_Z13
+# define WCSCSPN WCSCSPN_C
+# endif
# include <wcsmbs/wcscspn.c>
#endif
diff --git a/sysdeps/s390/multiarch/wcscspn-vx.S b/sysdeps/s390/wcscspn-vx.S
similarity index 98%
rename from sysdeps/s390/multiarch/wcscspn-vx.S
rename to sysdeps/s390/wcscspn-vx.S
index 06bc4e25d0456aea..882cb93fb807caa1 100644
--- a/sysdeps/s390/multiarch/wcscspn-vx.S
+++ b/sysdeps/s390/wcscspn-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-wcscspn.h>
+#if HAVE_WCSCSPN_Z13
# include "sysdep.h"
# include "asm-syntax.h"
@@ -57,7 +58,7 @@
otherwise =0;
r9: loaded byte count of vlbb reject-string
*/
-ENTRY(__wcscspn_vx)
+ENTRY(WCSCSPN_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
@@ -288,6 +289,10 @@ ENTRY(__wcscspn_vx)
vlgvg %r9,%v31,1
br %r14
.Lfallback:
- jg __wcscspn_c
-END(__wcscspn_vx)
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+ jg WCSCSPN_C
+END(WCSCSPN_Z13)
+
+# if ! HAVE_WCSCSPN_IFUNC
+strong_alias (WCSCSPN_Z13, wcscspn)
+# endif
+#endif
diff --git a/sysdeps/s390/multiarch/wcscspn.c b/sysdeps/s390/wcscspn.c
similarity index 69%
rename from sysdeps/s390/multiarch/wcscspn.c
rename to sysdeps/s390/wcscspn.c
index 707327522ad20287..0ce31b8aabf3b429 100644
--- a/sysdeps/s390/multiarch/wcscspn.c
+++ b/sysdeps/s390/wcscspn.c
@@ -16,12 +16,23 @@
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-wcscspn.h>
+
+#if HAVE_WCSCSPN_IFUNC
# include <wchar.h>
# include <ifunc-resolve.h>
-s390_vx_libc_ifunc2 (__wcscspn, wcscspn)
+# if HAVE_WCSCSPN_C
+extern __typeof (wcscspn) WCSCSPN_C attribute_hidden;
+# endif
+
+# if HAVE_WCSCSPN_Z13
+extern __typeof (wcscspn) WCSCSPN_Z13 attribute_hidden;
+# endif
-#else
-# include <wcsmbs/wcscspn.c>
-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
+s390_libc_ifunc_expr (wcscspn, wcscspn,
+ (HAVE_WCSCSPN_Z13 && (hwcap & HWCAP_S390_VX))
+ ? WCSCSPN_Z13
+ : WCSCSPN_DEFAULT
+ )
+#endif
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