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