1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/x86_64/wcsnlen.S b/sysdeps/x86_64/wcsnlen.S
new file mode 100644
index 0000000000..b30b3f0785
--- /dev/null
+++ b/sysdeps/x86_64/wcsnlen.S
@@ -0,0 +1,49 @@
+/* wcsnlen dispatch for RTLD and non-multiarch .c files
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* wcsnlen non-multiarch build is split into two files,
+   wcsnlen-generic.c and wcsnlen.S. The wcsnlen.S build is for
+   ISA level >= 2 uses the optimized assembly implementations in
+   multiarch/wcsnlen*.S.  This must be split into two files because
+   we cannot include C code from assembly or vice versa.  */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL >= 2
+
+# define WCSNLEN	__wcsnlen
+/* This symbol must stay linked to the name in wcslen.S.  */
+#if IS_IN (rtld)
+# define OVERFLOW_STRLEN	__wcslen
+#else
+# define OVERFLOW_STRLEN	HIDDEN_JUMPTARGET (__wcslen)
+#endif
+
+# define DEFAULT_IMPL_V2	"multiarch/wcsnlen-sse4_1.S"
+# define DEFAULT_IMPL_V3	"multiarch/wcsnlen-avx2.S"
+# define DEFAULT_IMPL_V4	"multiarch/wcsnlen-evex.S"
+
+/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
+   should never be used from here.  */
+# define DEFAULT_IMPL_V1	"ERROR -- Invalid ISA IMPL"
+
+# include "isa-default-impl.h"
+
+weak_alias (__wcsnlen, wcsnlen)
+libc_hidden_def (__wcsnlen)
+#endif