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commit 581a051c2e09a847332d4750f6132de0f0ad15b6
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Author: Stefan Liebler <stli@linux.ibm.com>
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Date: Tue Dec 18 13:57:16 2018 +0100
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S390: Refactor memchr ifunc handling.
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The ifunc handling for memchr 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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Note: The fallback s390-32/s390-64 ifunc variants with srst instruction
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are now moved to the unified memchr-z900.S file which can be used for
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31/64bit. The s390-32/s390-64 files multiarch/memchr.c and memchr.S
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are deleted.
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ChangeLog:
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* sysdeps/s390/multiarch/Makefile
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(sysdep_routines): Remove memchr variants.
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* sysdeps/s390/Makefile (sysdep_routines): Add memchr variants.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Refactor ifunc handling for memchr.
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* sysdeps/s390/multiarch/memchr-vx.S: Move to ...
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* sysdeps/s390/memchr-vx.S: ... here and adjust ifunc handling.
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* sysdeps/s390/multiarch/memchr.c: Move to ...
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* sysdeps/s390/memchr.c: ... here and adjust ifunc handling.
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* sysdeps/s390/ifunc-memchr.h: New file.
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* sysdeps/s390/s390-64/memchr.S: Move to ...
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* sysdeps/s390/memchr-z900.S: ... here and adjust to be usable
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for 31/64bit and ifunc handling.
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* sysdeps/s390/s390-32/multiarch/memchr.c: Delete file.
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* sysdeps/s390/s390-64/multiarch/memchr.c: Likewise.
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* sysdeps/s390/s390-32/memchr.S: Likewise.
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diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
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index 092d55826fbd15a5..816b2fccdc75e4cf 100644
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--- a/sysdeps/s390/Makefile
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+++ b/sysdeps/s390/Makefile
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@@ -52,5 +52,6 @@ sysdep_routines += bzero memset memset-z900 \
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strrchr strrchr-vx strrchr-c \
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strspn strspn-vx strspn-c \
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strpbrk strpbrk-vx strpbrk-c \
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- strcspn strcspn-vx strcspn-c
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+ strcspn strcspn-vx strcspn-c \
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+ memchr memchr-vx memchr-z900
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endif
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diff --git a/sysdeps/s390/ifunc-memchr.h b/sysdeps/s390/ifunc-memchr.h
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new file mode 100644
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index 0000000000000000..5d1327b45353322b
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--- /dev/null
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+++ b/sysdeps/s390/ifunc-memchr.h
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@@ -0,0 +1,52 @@
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+/* memchr 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_MEMCHR_IFUNC 1
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+#else
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+# define HAVE_MEMCHR_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_MEMCHR_IFUNC_AND_VX_SUPPORT HAVE_MEMCHR_IFUNC
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+#else
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+# define HAVE_MEMCHR_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 MEMCHR_DEFAULT MEMCHR_Z13
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+# define HAVE_MEMCHR_Z900_G5 0
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+# define HAVE_MEMCHR_Z13 1
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+#else
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+# define MEMCHR_DEFAULT MEMCHR_Z900_G5
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+# define HAVE_MEMCHR_Z900_G5 1
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+# define HAVE_MEMCHR_Z13 HAVE_MEMCHR_IFUNC_AND_VX_SUPPORT
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+#endif
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+
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+#if HAVE_MEMCHR_Z900_G5
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+# define MEMCHR_Z900_G5 __memchr_default
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+#else
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+# define MEMCHR_Z900_G5 NULL
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+#endif
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+
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+#if HAVE_MEMCHR_Z13
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+# define MEMCHR_Z13 __memchr_vx
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+#else
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+# define MEMCHR_Z13 NULL
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+#endif
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diff --git a/sysdeps/s390/multiarch/memchr-vx.S b/sysdeps/s390/memchr-vx.S
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similarity index 92%
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rename from sysdeps/s390/multiarch/memchr-vx.S
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rename to sysdeps/s390/memchr-vx.S
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index 77d31e0036915665..274e7971ca7e9413 100644
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--- a/sysdeps/s390/multiarch/memchr-vx.S
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+++ b/sysdeps/s390/memchr-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-memchr.h>
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+#if HAVE_MEMCHR_Z13
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# include "sysdep.h"
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# include "asm-syntax.h"
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@@ -38,7 +39,7 @@
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-v17=index of found c
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-v18=c replicated
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*/
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-ENTRY(__memchr_vx)
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+ENTRY(MEMCHR_Z13)
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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@@ -149,11 +150,14 @@ ENTRY(__memchr_vx)
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clgrjl %r0,%r4,.Lloop64
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j .Llt64
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-END(__memchr_vx)
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+END(MEMCHR_Z13)
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-# define memchr __memchr_c
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-# undef libc_hidden_builtin_def
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-# define libc_hidden_builtin_def(name) strong_alias(__memchr_c, __GI_memchr)
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-#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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+# if ! HAVE_MEMCHR_IFUNC
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+strong_alias (MEMCHR_Z13, __memchr)
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+weak_alias (__memchr, memchr)
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+# endif
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-#include <memchr.S>
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+# if ! HAVE_MEMCHR_Z900_G5 && defined SHARED && IS_IN (libc)
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+strong_alias (MEMCHR_Z13, __GI_memchr)
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+# endif
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+#endif
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diff --git a/sysdeps/s390/s390-64/memchr.S b/sysdeps/s390/memchr-z900.S
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similarity index 63%
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rename from sysdeps/s390/s390-64/memchr.S
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rename to sysdeps/s390/memchr-z900.S
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index a19fcafa147dc338..c016bc41c61be2dc 100644
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--- a/sysdeps/s390/s390-64/memchr.S
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+++ b/sysdeps/s390/memchr-z900.S
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@@ -1,4 +1,4 @@
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-/* Search a character in a block of memory. 64 bit S/390 version.
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+/* Search a character in a block of memory. 31/64 bit S/390 version.
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Copyright (C) 2001-2018 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of the GNU C Library.
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@@ -22,19 +22,42 @@
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%r3 = character to find
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%r4 = number of bytes to search. */
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+#include <ifunc-memchr.h>
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#include "sysdep.h"
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#include "asm-syntax.h"
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+#if HAVE_MEMCHR_Z900_G5
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+# if defined __s390x__
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+# define SLGR slgr
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+# define LGHI lghi
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+# define NGR ngr
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+# define LGR lgr
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+# else
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+# define SLGR slr
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+# define LGHI lhi
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+# define NGR nr
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+# define LGR lr
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+# endif /* ! defined __s390x__ */
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+
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.text
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-ENTRY(memchr)
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- lghi %r0,0xff
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- ngr %r0,%r3
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- lgr %r1,%r2
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+ENTRY(MEMCHR_Z900_G5)
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+ LGHI %r0,0xff
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+ NGR %r0,%r3
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+ LGR %r1,%r2
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la %r2,0(%r4,%r1)
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0: srst %r2,%r1
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jo 0b
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brc 13,1f
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- slgr %r2,%r2
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+ SLGR %r2,%r2
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1: br %r14
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-END(memchr)
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-libc_hidden_builtin_def (memchr)
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+END(MEMCHR_Z900_G5)
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+
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+# if ! HAVE_MEMCHR_IFUNC
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+strong_alias (MEMCHR_Z900_G5, __memchr)
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+weak_alias (__memchr, memchr)
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+# endif
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+
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+# if defined SHARED && IS_IN (libc)
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+strong_alias (MEMCHR_Z900_G5, __GI_memchr)
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+# endif
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+#endif
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diff --git a/sysdeps/s390/multiarch/memchr.c b/sysdeps/s390/memchr.c
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similarity index 68%
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rename from sysdeps/s390/multiarch/memchr.c
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rename to sysdeps/s390/memchr.c
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index 3885ebaa4d90ed1a..490f1b66002aae05 100644
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--- a/sysdeps/s390/multiarch/memchr.c
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+++ b/sysdeps/s390/memchr.c
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@@ -16,12 +16,26 @@
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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-memchr.h>
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+
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+#if HAVE_MEMCHR_IFUNC
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# define memchr __redirect_memchr
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# include <string.h>
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# undef memchr
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# include <ifunc-resolve.h>
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-s390_vx_libc_ifunc2_redirected (__redirect_memchr, __memchr, memchr)
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+# if HAVE_MEMCHR_Z900_G5
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+extern __typeof (__redirect_memchr) MEMCHR_Z900_G5 attribute_hidden;
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+# endif
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+
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+# if HAVE_MEMCHR_Z13
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+extern __typeof (__redirect_memchr) MEMCHR_Z13 attribute_hidden;
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+# endif
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+s390_libc_ifunc_expr (__redirect_memchr, __memchr,
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+ (HAVE_MEMCHR_Z13 && (hwcap & HWCAP_S390_VX))
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+ ? MEMCHR_Z13
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+ : MEMCHR_DEFAULT
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+ )
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+weak_alias (__memchr, memchr)
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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 1578f21af4a1bd06..fa1f7b81db912be0 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 += memchr memchr-vx \
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- rawmemchr rawmemchr-vx rawmemchr-c \
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+sysdep_routines += rawmemchr rawmemchr-vx rawmemchr-c \
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memccpy memccpy-vx memccpy-c \
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memrchr memrchr-vx memrchr-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 2d48c99c8d5663fe..b4be0140424aed69 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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@@ -42,6 +42,7 @@
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#include <ifunc-strspn.h>
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#include <ifunc-strpbrk.h>
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#include <ifunc-strcspn.h>
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+#include <ifunc-memchr.h>
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/* Maximum number of IFUNC implementations. */
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#define MAX_IFUNC 3
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@@ -372,6 +373,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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)
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#endif /* HAVE_STRCSPN_IFUNC */
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d8307d |
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d8307d |
+#if HAVE_MEMCHR_IFUNC
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+ IFUNC_IMPL (i, name, memchr,
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d8307d |
+# if HAVE_MEMCHR_Z13
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d8307d |
+ IFUNC_IMPL_ADD (array, i, memchr,
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d8307d |
+ dl_hwcap & HWCAP_S390_VX, MEMCHR_Z13)
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d8307d |
+# endif
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d8307d |
+# if HAVE_MEMCHR_Z900_G5
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+ IFUNC_IMPL_ADD (array, i, memchr, 1, MEMCHR_Z900_G5)
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d8307d |
+# endif
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+ )
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d8307d |
+#endif /* HAVE_MEMCHR_IFUNC */
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d8307d |
+
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d8307d |
#ifdef HAVE_S390_VX_ASM_SUPPORT
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d8307d |
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# define IFUNC_VX_IMPL(FUNC) \
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d8307d |
@@ -412,7 +425,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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d8307d |
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IFUNC_VX_IMPL (wcscspn);
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d8307d |
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- IFUNC_VX_IMPL (memchr);
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IFUNC_VX_IMPL (wmemchr);
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IFUNC_VX_IMPL (rawmemchr);
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d8307d |
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d8307d |
diff --git a/sysdeps/s390/s390-32/memchr.S b/sysdeps/s390/s390-32/memchr.S
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d8307d |
deleted file mode 100644
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d8307d |
index 54f9b85f578fa1c7..0000000000000000
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d8307d |
--- a/sysdeps/s390/s390-32/memchr.S
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d8307d |
+++ /dev/null
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d8307d |
@@ -1,41 +0,0 @@
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-/* Search a character in a block of memory. For IBM S390
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- Copyright (C) 2000-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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d8307d |
-
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d8307d |
- The GNU C Library is free software; you can redistribute it and/or
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d8307d |
- modify it under the terms of the GNU Lesser General Public
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d8307d |
- License as published by the Free Software Foundation; either
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d8307d |
- version 2.1 of the License, or (at your option) any later version.
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d8307d |
-
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d8307d |
- The GNU C Library is distributed in the hope that it will be useful,
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d8307d |
- but WITHOUT ANY WARRANTY; without even the implied warranty of
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d8307d |
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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d8307d |
- Lesser General Public License for more details.
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d8307d |
-
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d8307d |
- You should have received a copy of the GNU Lesser General Public
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d8307d |
- License along with the GNU C Library; if not, see
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d8307d |
- <http://www.gnu.org/licenses/>. */
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d8307d |
-
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d8307d |
-/*
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d8307d |
- * R2 = address to memory area
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d8307d |
- * R3 = character to find
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d8307d |
- * R4 = number of bytes to search
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d8307d |
- */
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d8307d |
-
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d8307d |
-#include "sysdep.h"
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-#include "asm-syntax.h"
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-
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- .text
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-ENTRY(memchr)
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- lhi %r0,0xff
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d8307d |
- nr %r0,%r3
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d8307d |
- lr %r1,%r2
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d8307d |
- la %r2,0(%r4,%r1)
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d8307d |
-0: srst %r2,%r1
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d8307d |
- jo 0b
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d8307d |
- brc 13,1f
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d8307d |
- slr %r2,%r2
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d8307d |
-1: br %r14
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-END(memchr)
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d8307d |
-libc_hidden_builtin_def (memchr)
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d8307d |
diff --git a/sysdeps/s390/s390-32/multiarch/memchr.c b/sysdeps/s390/s390-32/multiarch/memchr.c
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d8307d |
deleted file mode 100644
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d8307d |
index 5e1610afa43ee549..0000000000000000
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d8307d |
--- a/sysdeps/s390/s390-32/multiarch/memchr.c
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d8307d |
+++ /dev/null
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d8307d |
@@ -1,21 +0,0 @@
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d8307d |
-/* Multiple versions of memchr.
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d8307d |
- Copyright (C) 2015-2018 Free Software Foundation, Inc.
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d8307d |
- This file is part of the GNU C Library.
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d8307d |
-
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d8307d |
- The GNU C Library is free software; you can redistribute it and/or
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d8307d |
- modify it under the terms of the GNU Lesser General Public
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d8307d |
- License as published by the Free Software Foundation; either
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d8307d |
- version 2.1 of the License, or (at your option) any later version.
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d8307d |
-
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d8307d |
- The GNU C Library is distributed in the hope that it will be useful,
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d8307d |
- but WITHOUT ANY WARRANTY; without even the implied warranty of
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d8307d |
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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d8307d |
- Lesser General Public License for more details.
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d8307d |
-
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d8307d |
- You should have received a copy of the GNU Lesser General Public
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d8307d |
- License along with the GNU C Library; if not, see
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d8307d |
- <http://www.gnu.org/licenses/>. */
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d8307d |
-
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d8307d |
-/* This wrapper-file is needed, because otherwise file
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d8307d |
- sysdeps/s390/s390-[32|64]/memchr.S will be used. */
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d8307d |
-#include <sysdeps/s390/multiarch/memchr.c>
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d8307d |
diff --git a/sysdeps/s390/s390-64/multiarch/memchr.c b/sysdeps/s390/s390-64/multiarch/memchr.c
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d8307d |
deleted file mode 100644
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d8307d |
index 5e1610afa43ee549..0000000000000000
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d8307d |
--- a/sysdeps/s390/s390-64/multiarch/memchr.c
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d8307d |
+++ /dev/null
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d8307d |
@@ -1,21 +0,0 @@
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d8307d |
-/* Multiple versions of memchr.
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d8307d |
- Copyright (C) 2015-2018 Free Software Foundation, Inc.
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d8307d |
- This file is part of the GNU C Library.
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d8307d |
-
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d8307d |
- The GNU C Library is free software; you can redistribute it and/or
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d8307d |
- modify it under the terms of the GNU Lesser General Public
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d8307d |
- License as published by the Free Software Foundation; either
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d8307d |
- version 2.1 of the License, or (at your option) any later version.
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d8307d |
-
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d8307d |
- The GNU C Library is distributed in the hope that it will be useful,
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d8307d |
- but WITHOUT ANY WARRANTY; without even the implied warranty of
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d8307d |
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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d8307d |
- Lesser General Public License for more details.
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d8307d |
-
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d8307d |
- You should have received a copy of the GNU Lesser General Public
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d8307d |
- License along with the GNU C Library; if not, see
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d8307d |
- <http://www.gnu.org/licenses/>. */
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d8307d |
-
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d8307d |
-/* This wrapper-file is needed, because otherwise file
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d8307d |
- sysdeps/s390/s390-[32|64]/memchr.S will be used. */
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d8307d |
-#include <sysdeps/s390/multiarch/memchr.c>
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