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commit 8507e831907ff46d06382fe453c6832db2594e0b
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Author: Stefan Liebler <stli@linux.ibm.com>
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Date: Tue Dec 18 13:57:23 2018 +0100
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S390: Refactor wcsspn ifunc handling.
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The ifunc handling for wcsspn is adjusted in order to omit ifunc
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if the minimum architecture level already supports newer CPUs by default.
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Unfortunately the c ifunc variant can't be omitted at all as it is used
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by the z13 ifunc variant as fallback if the pointers are not 4-byte aligned.
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Glibc internal calls will use the "newer" ifunc variant.
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ChangeLog:
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* sysdeps/s390/multiarch/Makefile
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(sysdep_routines): Remove wcsspn variants.
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* sysdeps/s390/Makefile (sysdep_routines): Add wcsspn variants.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Refactor ifunc handling for wcsspn.
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* sysdeps/s390/multiarch/wcsspn-c.c: Move to ...
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* sysdeps/s390/wcsspn-c.c: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/wcsspn-vx.S: Move to ...
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* sysdeps/s390/wcsspn-vx.S: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/wcsspn.c: Move to ...
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* sysdeps/s390/wcsspn.c: ... here and adjust ifunc handling.
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* sysdeps/s390/ifunc-wcsspn.h: New file.
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diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
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index 19a556eccf285e2f..38dbba8ccfd3cd66 100644
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--- a/sysdeps/s390/Makefile
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+++ b/sysdeps/s390/Makefile
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@@ -72,5 +72,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
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wcsncmp wcsncmp-vx wcsncmp-c \
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wcschr wcschr-vx wcschr-c \
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wcschrnul wcschrnul-vx wcschrnul-c \
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- wcsrchr wcsrchr-vx wcsrchr-c
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+ wcsrchr wcsrchr-vx wcsrchr-c \
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+ wcsspn wcsspn-vx wcsspn-c
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endif
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diff --git a/sysdeps/s390/ifunc-wcsspn.h b/sysdeps/s390/ifunc-wcsspn.h
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new file mode 100644
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index 0000000000000000..1189c6b93ff9fbec
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--- /dev/null
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+++ b/sysdeps/s390/ifunc-wcsspn.h
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@@ -0,0 +1,53 @@
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+/* wcsspn variant information on S/390 version.
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+ Copyright (C) 2018 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#if defined USE_MULTIARCH && IS_IN (libc) \
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+ && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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+# define HAVE_WCSSPN_IFUNC 1
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+#else
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+# define HAVE_WCSSPN_IFUNC 0
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+#endif
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+
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+#ifdef HAVE_S390_VX_ASM_SUPPORT
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+# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT HAVE_WCSSPN_IFUNC
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+#else
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+# define HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT 0
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+#endif
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+
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+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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+# define WCSSPN_DEFAULT WCSSPN_Z13
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+/* The z13 ifunc variant is using the common code variant as fallback! */
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+# define HAVE_WCSSPN_C 1
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+# define HAVE_WCSSPN_Z13 1
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+#else
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+# define WCSSPN_DEFAULT WCSSPN_C
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+# define HAVE_WCSSPN_C 1
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+# define HAVE_WCSSPN_Z13 HAVE_WCSSPN_IFUNC_AND_VX_SUPPORT
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+#endif
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+
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+#if HAVE_WCSSPN_C
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+# define WCSSPN_C __wcsspn_c
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+#else
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+# define WCSSPN_C NULL
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+#endif
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+
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+#if HAVE_WCSSPN_Z13
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+# define WCSSPN_Z13 __wcsspn_vx
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+#else
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+# define WCSSPN_Z13 NULL
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+#endif
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diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
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index 3d72cbb5f32e68f3..091f5150847a404a 100644
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--- a/sysdeps/s390/multiarch/Makefile
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+++ b/sysdeps/s390/multiarch/Makefile
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@@ -1,6 +1,5 @@
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ifeq ($(subdir),wcsmbs)
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-sysdep_routines += wcsspn wcsspn-vx wcsspn-c \
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- wcspbrk wcspbrk-vx wcspbrk-c \
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+sysdep_routines += wcspbrk wcspbrk-vx wcspbrk-c \
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wcscspn wcscspn-vx wcscspn-c \
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wmemchr wmemchr-vx wmemchr-c \
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wmemset wmemset-vx wmemset-c \
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diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
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index ffb4d5b6872ef9db..6f4de2845ba0a378 100644
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--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
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+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
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@@ -59,6 +59,7 @@
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#include <ifunc-wcschr.h>
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#include <ifunc-wcschrnul.h>
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#include <ifunc-wcsrchr.h>
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+#include <ifunc-wcsspn.h>
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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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@@ -593,6 +594,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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)
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#endif /* HAVE_WCSRCHR_IFUNC */
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+#if HAVE_WCSSPN_IFUNC
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+ IFUNC_IMPL (i, name, wcsspn,
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+# if HAVE_WCSSPN_Z13
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+ IFUNC_IMPL_ADD (array, i, wcsspn,
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+ dl_hwcap & HWCAP_S390_VX, WCSSPN_Z13)
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+# endif
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+# if HAVE_WCSSPN_C
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+ IFUNC_IMPL_ADD (array, i, wcsspn, 1, WCSSPN_C)
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+# endif
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+ )
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+#endif /* HAVE_WCSSPN_IFUNC */
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+
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define IFUNC_VX_IMPL(FUNC) \
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@@ -601,8 +614,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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__##FUNC##_vx) \
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IFUNC_IMPL_ADD (array, i, FUNC, 1, __##FUNC##_c))
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- IFUNC_VX_IMPL (wcsspn);
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-
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IFUNC_VX_IMPL (wcspbrk);
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IFUNC_VX_IMPL (wcscspn);
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diff --git a/sysdeps/s390/multiarch/wcsspn-c.c b/sysdeps/s390/wcsspn-c.c
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similarity index 72%
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rename from sysdeps/s390/multiarch/wcsspn-c.c
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rename to sysdeps/s390/wcsspn-c.c
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index 2c0bd0f4e69516de..db3bdb9b9f09e500 100644
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--- a/sysdeps/s390/multiarch/wcsspn-c.c
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+++ b/sysdeps/s390/wcsspn-c.c
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@@ -16,16 +16,22 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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-# define WCSSPN __wcsspn_c
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+#include <ifunc-wcsspn.h>
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-# include <wchar.h>
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-extern __typeof (wcsspn) __wcsspn_c;
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-# ifdef SHARED
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-# undef libc_hidden_def
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-# define libc_hidden_def(name) \
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+#if HAVE_WCSSPN_C
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+# if HAVE_WCSSPN_IFUNC || HAVE_WCSSPN_Z13
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+# define WCSSPN WCSSPN_C
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+
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+# if defined SHARED && IS_IN (libc)
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+# undef libc_hidden_def
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+# if ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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+# define libc_hidden_def(name) \
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__hidden_ver1 (__wcsspn_c, __GI_wcsspn, __wcsspn_c);
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-# endif /* SHARED */
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+# else
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+# define libc_hidden_def(name)
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+# endif
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+# endif
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+# endif
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# include <wcsmbs/wcsspn.c>
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-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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+#endif
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diff --git a/sysdeps/s390/multiarch/wcsspn-vx.S b/sysdeps/s390/wcsspn-vx.S
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similarity index 97%
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rename from sysdeps/s390/multiarch/wcsspn-vx.S
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rename to sysdeps/s390/wcsspn-vx.S
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index 548f2ad1644c8e88..61f7d6d0902125b7 100644
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--- a/sysdeps/s390/multiarch/wcsspn-vx.S
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+++ b/sysdeps/s390/wcsspn-vx.S
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@@ -16,7 +16,8 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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+#include <ifunc-wcsspn.h>
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+#if HAVE_WCSSPN_Z13
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# include "sysdep.h"
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# include "asm-syntax.h"
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@@ -57,7 +58,7 @@
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otherwise =0;
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r9: loaded byte count of vlbb accept-string
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*/
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-ENTRY(__wcsspn_vx)
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+ENTRY(WCSSPN_Z13)
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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@@ -265,6 +266,15 @@ ENTRY(__wcsspn_vx)
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j .Lslow_next_acc_notonbb /* ... and search for zero in
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fully loaded vreg again. */
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.Lfallback:
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- jg __wcsspn_c
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-END(__wcsspn_vx)
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-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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+ jg WCSSPN_C
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+END(WCSSPN_Z13)
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+
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+# if ! HAVE_WCSSPN_IFUNC
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+strong_alias (WCSSPN_Z13, wcsspn)
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+# endif
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+
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+# if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT \
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+ && defined SHARED && IS_IN (libc)
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+strong_alias (WCSSPN_Z13, __GI_wcsspn)
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+# endif
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+#endif
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diff --git a/sysdeps/s390/multiarch/wcsspn.c b/sysdeps/s390/wcsspn.c
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similarity index 69%
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rename from sysdeps/s390/multiarch/wcsspn.c
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rename to sysdeps/s390/wcsspn.c
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index 7743144a8ca7c2ee..e916b1e4414e774d 100644
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--- a/sysdeps/s390/multiarch/wcsspn.c
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+++ b/sysdeps/s390/wcsspn.c
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@@ -16,14 +16,24 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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+#include <ifunc-wcsspn.h>
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+
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+#if HAVE_WCSSPN_IFUNC
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# define wcsspn __redirect_wcsspn
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# include <wchar.h>
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# undef wcsspn
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# include <ifunc-resolve.h>
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+# if HAVE_WCSSPN_C
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+extern __typeof (__redirect_wcsspn) WCSSPN_C attribute_hidden;
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+# endif
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-s390_vx_libc_ifunc2_redirected (__redirect_wcsspn, __wcsspn, wcsspn)
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+# if HAVE_WCSSPN_Z13
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+extern __typeof (__redirect_wcsspn) WCSSPN_Z13 attribute_hidden;
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+# endif
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-#else
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-# include <wcsmbs/wcsspn.c>
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-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
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+s390_libc_ifunc_expr (__redirect_wcsspn, wcsspn,
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+ (HAVE_WCSSPN_Z13 && (hwcap & HWCAP_S390_VX))
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+ ? WCSSPN_Z13
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+ : WCSSPN_DEFAULT
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bdc76f |
+ )
|
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bdc76f |
+#endif
|