x86-64: Move wcsnlen.S to multiarch/wcsnlen-sse4_1.S

Since wcsnlen.S uses pminud which is the part of SSE4.1, move wcsnlen.S
to multiarch/wcsnlen-sse4_1.S.

	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
	wcsnlen-sse4_1 and wcsnlen-c.
	* sysdeps/x86_64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Test __wcsnlen_sse4_1 and
	__wcsnlen_sse2.
	* sysdeps/x86_64/multiarch/ifunc-sse4_1.h: New file.
	* sysdeps/x86_64/multiarch/wcsnlen-c.c: Likewise.
	* sysdeps/x86_64/multiarch/wcsnlen-sse4_1.S: Likewise.
	* sysdeps/x86_64/multiarch/wcsnlen.c: Likewise.
	* sysdeps/x86_64/wcsnlen.S: Removed.

1 files changed, 31 insertions, 0 deletions

diff --git a/sysdeps/x86_64/multiarch/wcsnlen.c b/sysdeps/x86_64/multiarch/wcsnlen.c
new file mode 100644
index 0000000000..5f74d2ce82
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcsnlen.c
@@ -0,0 +1,31 @@
+/* Multiple versions of wcsnlen.
+   All versions must be listed in ifunc-impl-list.c.
+   Copyright (C) 2017 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
+   <http://www.gnu.org/licenses/>.  */
+
+/* Define multiple versions only for the definition in libc. */
+#if IS_IN (libc)
+# define __wcsnlen __redirect_wcsnlen
+# include <wchar.h>
+# undef __wcsnlen
+
+# define SYMBOL_NAME wcsnlen
+# include "ifunc-sse4_1.h"
+
+libc_ifunc_redirected (__redirect_wcsnlen, __wcsnlen, IFUNC_SELECTOR ());
+weak_alias (__wcsnlen, wcsnlen);
+#endif