S390: Optimize memccpy.

This patch provides optimized versions of memccpy with the z13 vector
instructions.

ChangeLog:

	* sysdeps/s390/multiarch/memccpy-c.c: New File.
	* sysdeps/s390/multiarch/memccpy-vx.S: Likewise.
	* sysdeps/s390/multiarch/memccpy.c: Likewise.
	* sysdeps/s390/multiarch/Makefile
	(sysdep_routines): Add memccpy functions.
	* sysdeps/s390/multiarch/ifunc-impl-list-common.c
	(__libc_ifunc_impl_list_common): Add ifunc test for memccpy.
	* string/memccpy.c: Use MEMCCPY if defined.

1 files changed, 28 insertions, 0 deletions

diff --git a/sysdeps/s390/multiarch/memccpy.c b/sysdeps/s390/multiarch/memccpy.c
new file mode 100644
index 0000000000..c5a9628aba
--- /dev/null
+++ b/sysdeps/s390/multiarch/memccpy.c
@@ -0,0 +1,28 @@
+/* Multiple versions of memccpy.
+   Copyright (C) 2015 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/>.  */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+# include <string.h>
+# include <ifunc-resolve.h>
+
+s390_vx_libc_ifunc (__memccpy)
+weak_alias (__memccpy, memccpy)
+
+#else
+# include <string/memccpy.c>
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */