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glibc/SOURCES/glibc-rh1659438-49.patch

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commit 8507e831907ff46d06382fe453c6832db2594e0b
Author: Stefan Liebler <stli@linux.ibm.com>
Date: Tue Dec 18 13:57:23 2018 +0100
S390: Refactor wcsspn ifunc handling.
The ifunc handling for wcsspn 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.
Glibc internal calls will use the "newer" ifunc variant.
ChangeLog:
* sysdeps/s390/multiarch/Makefile
(sysdep_routines): Remove wcsspn variants.
* sysdeps/s390/Makefile (sysdep_routines): Add wcsspn variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Refactor ifunc handling for wcsspn.
* sysdeps/s390/multiarch/wcsspn-c.c: Move to ...
* sysdeps/s390/wcsspn-c.c: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcsspn-vx.S: Move to ...
* sysdeps/s390/wcsspn-vx.S: ... here and adjust ifunc handling.
* sysdeps/s390/multiarch/wcsspn.c: Move to ...
* sysdeps/s390/wcsspn.c: ... here and adjust ifunc handling.
* sysdeps/s390/ifunc-wcsspn.h: New file.
diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 19a556eccf285e2f..38dbba8ccfd3cd66 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -72,5 +72,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
wcsncmp wcsncmp-vx wcsncmp-c \
wcschr wcschr-vx wcschr-c \
wcschrnul wcschrnul-vx wcschrnul-c \
- wcsrchr wcsrchr-vx wcsrchr-c
+ wcsrchr wcsrchr-vx wcsrchr-c \
+ wcsspn wcsspn-vx wcsspn-c
endif
diff --git a/sysdeps/s390/ifunc-wcsspn.h b/sysdeps/s390/ifunc-wcsspn.h
new file mode 100644
index 0000000000000000..1189c6b93ff9fbec
--- /dev/null
+++ b/sysdeps/s390/ifunc-wcsspn.h
@@ -0,0 +1,53 @@
+/* wcsspn 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_WCSSPN_IFUNC 1
+#else
+# define HAVE_WCSSPN_IFUNC 0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT HAVE_WCSSPN_IFUNC
+#else
+# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define WCSSPN_DEFAULT WCSSPN_Z13
+/* The z13 ifunc variant is using the common code variant as fallback! */
+# define HAVE_WCSSPN_C 1
+# define HAVE_WCSSPN_Z13 1
+#else
+# define WCSSPN_DEFAULT WCSSPN_C
+# define HAVE_WCSSPN_C 1
+# define HAVE_WCSSPN_Z13 HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_WCSSPN_C
+# define WCSSPN_C __wcsspn_c
+#else
+# define WCSSPN_C NULL
+#endif
+
+#if HAVE_WCSSPN_Z13
+# define WCSSPN_Z13 __wcsspn_vx
+#else
+# define WCSSPN_Z13 NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 3d72cbb5f32e68f3..091f5150847a404a 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcsspn wcsspn-vx wcsspn-c \
- wcspbrk wcspbrk-vx wcspbrk-c \
+sysdep_routines += wcspbrk wcspbrk-vx wcspbrk-c \
wcscspn wcscspn-vx wcscspn-c \
wmemchr wmemchr-vx wmemchr-c \
wmemset wmemset-vx wmemset-c \
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index ffb4d5b6872ef9db..6f4de2845ba0a378 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -59,6 +59,7 @@
#include <ifunc-wcschr.h>
#include <ifunc-wcschrnul.h>
#include <ifunc-wcsrchr.h>
+#include <ifunc-wcsspn.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -593,6 +594,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
)
#endif /* HAVE_WCSRCHR_IFUNC */
+#if HAVE_WCSSPN_IFUNC
+ IFUNC_IMPL (i, name, wcsspn,
+# if HAVE_WCSSPN_Z13
+ IFUNC_IMPL_ADD (array, i, wcsspn,
+ dl_hwcap & HWCAP_S390_VX, WCSSPN_Z13)
+# endif
+# if HAVE_WCSSPN_C
+ IFUNC_IMPL_ADD (array, i, wcsspn, 1, WCSSPN_C)
+# endif
+ )
+#endif /* HAVE_WCSSPN_IFUNC */
+
#ifdef HAVE_S390_VX_ASM_SUPPORT
# define IFUNC_VX_IMPL(FUNC) \
@@ -601,8 +614,6 @@ __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 (wcsspn);
-
IFUNC_VX_IMPL (wcspbrk);
IFUNC_VX_IMPL (wcscspn);
diff --git a/sysdeps/s390/multiarch/wcsspn-c.c b/sysdeps/s390/wcsspn-c.c
similarity index 72%
rename from sysdeps/s390/multiarch/wcsspn-c.c
rename to sysdeps/s390/wcsspn-c.c
index 2c0bd0f4e69516de..db3bdb9b9f09e500 100644
--- a/sysdeps/s390/multiarch/wcsspn-c.c
+++ b/sysdeps/s390/wcsspn-c.c
@@ -16,16 +16,22 @@
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 WCSSPN __wcsspn_c
+#include <ifunc-wcsspn.h>
-# include <wchar.h>
-extern __typeof (wcsspn) __wcsspn_c;
-# ifdef SHARED
-# undef libc_hidden_def
-# define libc_hidden_def(name) \
+#if HAVE_WCSSPN_C
+# if HAVE_WCSSPN_IFUNC || HAVE_WCSSPN_Z13
+# define WCSSPN WCSSPN_C
+
+# if defined SHARED && IS_IN (libc)
+# undef libc_hidden_def
+# if ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define libc_hidden_def(name) \
__hidden_ver1 (__wcsspn_c, __GI_wcsspn, __wcsspn_c);
-# endif /* SHARED */
+# else
+# define libc_hidden_def(name)
+# endif
+# endif
+# endif
# include <wcsmbs/wcsspn.c>
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+#endif
diff --git a/sysdeps/s390/multiarch/wcsspn-vx.S b/sysdeps/s390/wcsspn-vx.S
similarity index 97%
rename from sysdeps/s390/multiarch/wcsspn-vx.S
rename to sysdeps/s390/wcsspn-vx.S
index 548f2ad1644c8e88..61f7d6d0902125b7 100644
--- a/sysdeps/s390/multiarch/wcsspn-vx.S
+++ b/sysdeps/s390/wcsspn-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-wcsspn.h>
+#if HAVE_WCSSPN_Z13
# include "sysdep.h"
# include "asm-syntax.h"
@@ -57,7 +58,7 @@
otherwise =0;
r9: loaded byte count of vlbb accept-string
*/
-ENTRY(__wcsspn_vx)
+ENTRY(WCSSPN_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
@@ -265,6 +266,15 @@ ENTRY(__wcsspn_vx)
j .Lslow_next_acc_notonbb /* ... and search for zero in
fully loaded vreg again. */
.Lfallback:
- jg __wcsspn_c
-END(__wcsspn_vx)
-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
+ jg WCSSPN_C
+END(WCSSPN_Z13)
+
+# if ! HAVE_WCSSPN_IFUNC
+strong_alias (WCSSPN_Z13, wcsspn)
+# endif
+
+# if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT \
+ && defined SHARED && IS_IN (libc)
+strong_alias (WCSSPN_Z13, __GI_wcsspn)
+# endif
+#endif
diff --git a/sysdeps/s390/multiarch/wcsspn.c b/sysdeps/s390/wcsspn.c
similarity index 69%
rename from sysdeps/s390/multiarch/wcsspn.c
rename to sysdeps/s390/wcsspn.c
index 7743144a8ca7c2ee..e916b1e4414e774d 100644
--- a/sysdeps/s390/multiarch/wcsspn.c
+++ b/sysdeps/s390/wcsspn.c
@@ -16,14 +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-wcsspn.h>
+
+#if HAVE_WCSSPN_IFUNC
# define wcsspn __redirect_wcsspn
# include <wchar.h>
# undef wcsspn
# include <ifunc-resolve.h>
+# if HAVE_WCSSPN_C
+extern __typeof (__redirect_wcsspn) WCSSPN_C attribute_hidden;
+# endif
-s390_vx_libc_ifunc2_redirected (__redirect_wcsspn, __wcsspn, wcsspn)
+# if HAVE_WCSSPN_Z13
+extern __typeof (__redirect_wcsspn) WCSSPN_Z13 attribute_hidden;
+# endif
-#else
-# include <wcsmbs/wcsspn.c>
-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
+s390_libc_ifunc_expr (__redirect_wcsspn, wcsspn,
+ (HAVE_WCSSPN_Z13 && (hwcap & HWCAP_S390_VX))
+ ? WCSSPN_Z13
+ : WCSSPN_DEFAULT
+ )
+#endif
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