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264 lines
8.5 KiB
264 lines
8.5 KiB
9 months ago
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commit 483fc56978d11c7118326f92ea678bea2f092300
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Author: Stefan Liebler <stli@linux.ibm.com>
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Date: Tue Dec 18 13:57:15 2018 +0100
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S390: Refactor strspn ifunc handling.
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The ifunc handling for strspn is adjusted in order to omit ifunc
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variants if those will never be used as the minimum architecture level
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already supports newer CPUs by default.
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Glibc internal calls will then also 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 strspn variants.
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* sysdeps/s390/Makefile (sysdep_routines): Add strspn variants.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Refactor ifunc handling for strspn.
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* sysdeps/s390/multiarch/strspn-c.c: Move to ...
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* sysdeps/s390/strspn-c.c: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/strspn-vx.S: Move to ...
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* sysdeps/s390/strspn-vx.S: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/strspn.c: Move to ...
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* sysdeps/s390/strspn.c: ... here and adjust ifunc handling.
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* sysdeps/s390/ifunc-strspn.h: New file.
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diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
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index 3ad44c997e9f1f6b..c0a402117197b87f 100644
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--- a/sysdeps/s390/Makefile
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+++ b/sysdeps/s390/Makefile
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@@ -49,5 +49,6 @@ sysdep_routines += bzero memset memset-z900 \
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strncmp strncmp-vx strncmp-c \
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strchr strchr-vx strchr-c \
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strchrnul strchrnul-vx strchrnul-c \
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- strrchr strrchr-vx strrchr-c
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+ strrchr strrchr-vx strrchr-c \
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+ strspn strspn-vx strspn-c
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endif
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diff --git a/sysdeps/s390/ifunc-strspn.h b/sysdeps/s390/ifunc-strspn.h
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new file mode 100644
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index 0000000000000000..1152ba1f3d3b9b62
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--- /dev/null
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+++ b/sysdeps/s390/ifunc-strspn.h
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@@ -0,0 +1,52 @@
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+/* strspn 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_STRSPN_IFUNC 1
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+#else
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+# define HAVE_STRSPN_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_STRSPN_IFUNC_AND_VX_SUPPORT HAVE_STRSPN_IFUNC
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+#else
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+# define HAVE_STRSPN_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 STRSPN_DEFAULT STRSPN_Z13
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+# define HAVE_STRSPN_C 0
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+# define HAVE_STRSPN_Z13 1
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+#else
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+# define STRSPN_DEFAULT STRSPN_C
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+# define HAVE_STRSPN_C 1
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+# define HAVE_STRSPN_Z13 HAVE_STRSPN_IFUNC_AND_VX_SUPPORT
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+#endif
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+
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+#if HAVE_STRSPN_C
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+# define STRSPN_C __strspn_c
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+#else
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+# define STRSPN_C NULL
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+#endif
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+
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+#if HAVE_STRSPN_Z13
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+# define STRSPN_Z13 __strspn_vx
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+#else
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+# define STRSPN_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 c8267555585b617e..9b141e338ca551ec 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),string)
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-sysdep_routines += strspn strspn-vx strspn-c \
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- strpbrk strpbrk-vx strpbrk-c \
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+sysdep_routines += strpbrk strpbrk-vx strpbrk-c \
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strcspn strcspn-vx strcspn-c \
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memchr memchr-vx \
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rawmemchr rawmemchr-vx rawmemchr-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 60cd705ffa4e2c35..c39e1f793aad530c 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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@@ -39,6 +39,7 @@
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#include <ifunc-strchr.h>
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#include <ifunc-strchrnul.h>
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#include <ifunc-strrchr.h>
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+#include <ifunc-strspn.h>
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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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@@ -333,6 +334,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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)
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#endif /* HAVE_STRRCHR_IFUNC */
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+#if HAVE_STRSPN_IFUNC
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+ IFUNC_IMPL (i, name, strspn,
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+# if HAVE_STRSPN_Z13
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+ IFUNC_IMPL_ADD (array, i, strspn,
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+ dl_hwcap & HWCAP_S390_VX, STRSPN_Z13)
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+# endif
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+# if HAVE_STRSPN_C
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+ IFUNC_IMPL_ADD (array, i, strspn, 1, STRSPN_C)
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+# endif
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+ )
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+#endif /* HAVE_STRSPN_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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@@ -367,7 +380,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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IFUNC_VX_IMPL (wcsrchr);
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- IFUNC_VX_IMPL (strspn);
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IFUNC_VX_IMPL (wcsspn);
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IFUNC_VX_IMPL (strpbrk);
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diff --git a/sysdeps/s390/multiarch/strspn-c.c b/sysdeps/s390/strspn-c.c
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similarity index 78%
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rename from sysdeps/s390/multiarch/strspn-c.c
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rename to sysdeps/s390/strspn-c.c
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index 0efe61bfb2f89caf..506f6683212f03ab 100644
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--- a/sysdeps/s390/multiarch/strspn-c.c
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+++ b/sysdeps/s390/strspn-c.c
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@@ -16,13 +16,17 @@
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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 STRSPN __strspn_c
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-# ifdef SHARED
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-# undef libc_hidden_builtin_def
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-# define libc_hidden_builtin_def(name) \
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+#include <ifunc-strspn.h>
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+
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+#if HAVE_STRSPN_C
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+# if HAVE_STRSPN_IFUNC
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+# define STRSPN STRSPN_C
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+# if defined SHARED && IS_IN (libc)
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+# undef libc_hidden_builtin_def
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+# define libc_hidden_builtin_def(name) \
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__hidden_ver1 (__strspn_c, __GI_strspn, __strspn_c);
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-# endif /* SHARED */
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+# endif
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+# endif
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# include <string/strspn.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/strspn-vx.S b/sysdeps/s390/strspn-vx.S
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similarity index 97%
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rename from sysdeps/s390/multiarch/strspn-vx.S
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rename to sysdeps/s390/strspn-vx.S
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index 6aa823e63b1189c3..ae5529b567ee7435 100644
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--- a/sysdeps/s390/multiarch/strspn-vx.S
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+++ b/sysdeps/s390/strspn-vx.S
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@@ -16,7 +16,9 @@
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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-strspn.h>
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+
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+#if HAVE_STRSPN_Z13
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# include "sysdep.h"
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# include "asm-syntax.h"
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@@ -57,7 +59,7 @@
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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(__strspn_vx)
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+ENTRY(STRSPN_Z13)
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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@@ -252,5 +254,14 @@ ENTRY(__strspn_vx)
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Check for zero is in jump-target. */
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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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-END(__strspn_vx)
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-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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+END(STRSPN_Z13)
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+
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+# if ! HAVE_STRSPN_IFUNC
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+strong_alias (STRSPN_Z13, strspn)
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+# endif
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+
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+# if ! HAVE_STRSPN_C && defined SHARED && IS_IN (libc)
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+strong_alias (STRSPN_Z13, __GI_strspn)
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+# endif
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+
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+#endif /* HAVE_STRSPN_Z13 */
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diff --git a/sysdeps/s390/multiarch/strspn.c b/sysdeps/s390/strspn.c
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similarity index 70%
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rename from sysdeps/s390/multiarch/strspn.c
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rename to sysdeps/s390/strspn.c
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index bedbe98cfc4ab14d..91401fdaf89ed8a2 100644
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--- a/sysdeps/s390/multiarch/strspn.c
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+++ b/sysdeps/s390/strspn.c
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@@ -16,7 +16,9 @@
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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-strspn.h>
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+
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+#if HAVE_STRSPN_IFUNC
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# define strspn __redirect_strspn
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/* Omit the strspn inline definitions because it would redefine strspn. */
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# define __NO_STRING_INLINES
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@@ -24,8 +26,17 @@
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# undef strspn
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# include <ifunc-resolve.h>
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-s390_vx_libc_ifunc2_redirected (__redirect_strspn, __strspn, strspn)
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+# if HAVE_STRSPN_C
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+extern __typeof (__redirect_strspn) STRSPN_C attribute_hidden;
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+# endif
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+
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+# if HAVE_STRSPN_Z13
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+extern __typeof (__redirect_strspn) STRSPN_Z13 attribute_hidden;
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+# endif
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-#else
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-# include <string/strspn.c>
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-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
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+s390_libc_ifunc_expr (__redirect_strspn, strspn,
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+ (HAVE_STRSPN_Z13 && (hwcap & HWCAP_S390_VX))
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+ ? STRSPN_Z13
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+ : STRSPN_DEFAULT
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+ )
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+#endif /* HAVE_STRSPN_IFUNC */
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