S390: Optimize strcat and wcscat.

This patch provides optimized versions of strcat and wcscat with the z13
vector instructions.

ChangeLog:

	* sysdeps/s390/multiarch/strcat-c.c: New File.
	* sysdeps/s390/multiarch/strcat-vx.S: Likewise.
	* sysdeps/s390/multiarch/strcat.c: Likewise.
	* sysdeps/s390/multiarch/wcscat-c.c: Likewise.
	* sysdeps/s390/multiarch/wcscat-vx.S: Likewise.
	* sysdeps/s390/multiarch/wcscat.c: Likewise.
	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strcat and
	wcscat functions.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Add ifunc test for strcat, wcscat.
	* string/strcat.c (STRCAT): Define and use macro.
	* wcsmbs/wcscat.c: Use WCSCAT if defined.
	* string/test-strcat.c: Add wcscat support.
	* wcsmbs/test-wcscat.c: New File.
	* wcsmbs/Makefile (strop-tests): Add wcscat.
	* benchtests/bench-strcat.c: Add wcscat support.
	* benchtests/bench-wcscat.c: New File.
	* benchtests/Makefile (wcsmbs-bench): Add wcscat.

17 files changed, 661 insertions, 82 deletions

diff --git a/ChangeLog b/ChangeLog
index ecd98878d2..d87525fbe3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,26 @@
 2015-08-26  Stefan Liebler  <stli@linux.vnet.ibm.com>
 
+	* sysdeps/s390/multiarch/strcat-c.c: New File.
+	* sysdeps/s390/multiarch/strcat-vx.S: Likewise.
+	* sysdeps/s390/multiarch/strcat.c: Likewise.
+	* sysdeps/s390/multiarch/wcscat-c.c: Likewise.
+	* sysdeps/s390/multiarch/wcscat-vx.S: Likewise.
+	* sysdeps/s390/multiarch/wcscat.c: Likewise.
+	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strcat and
+	wcscat functions.
+	* sysdeps/s390/multiarch/ifunc-impl-list.c
+	(__libc_ifunc_impl_list): Add ifunc test for strcat, wcscat.
+	* string/strcat.c (STRCAT): Define and use macro.
+	* wcsmbs/wcscat.c: Use WCSCAT if defined.
+	* string/test-strcat.c: Add wcscat support.
+	* wcsmbs/test-wcscat.c: New File.
+	* wcsmbs/Makefile (strop-tests): Add wcscat.
+	* benchtests/bench-strcat.c: Add wcscat support.
+	* benchtests/bench-wcscat.c: New File.
+	* benchtests/Makefile (wcsmbs-bench): Add wcscat.
+
+2015-08-26  Stefan Liebler  <stli@linux.vnet.ibm.com>
+
 	* sysdeps/s390/multiarch/stpncpy-c.c: New File.
 	* sysdeps/s390/multiarch/stpncpy-vx.S: Likewise.
 	* sysdeps/s390/multiarch/stpncpy.c: Likewise.
diff --git a/benchtests/Makefile b/benchtests/Makefile
index c3531a9954..7c724fbda6 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -36,7 +36,7 @@ string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
 		strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \
 		strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \
 		strcoll
-wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy
+wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat
 string-bench-all := $(string-bench) ${wcsmbs-bench}
 
 # We have to generate locales
diff --git a/benchtests/bench-strcat.c b/benchtests/bench-strcat.c
index 7dd79fb6a1..1abf6d3d06 100644
--- a/benchtests/bench-strcat.c
+++ b/benchtests/bench-strcat.c
@@ -17,19 +17,45 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define TEST_MAIN
-#define TEST_NAME "strcat"
+#ifndef WIDE
+# define TEST_NAME "strcat"
+#else
+# define TEST_NAME "wcscat"
+#endif /* WIDE */
 #include "bench-string.h"
 
-typedef char *(*proto_t) (char *, const char *);
-char *simple_strcat (char *, const char *);
-
-IMPL (simple_strcat, 0)
-IMPL (strcat, 1)
-
-char *
-simple_strcat (char *dst, const char *src)
+#ifndef WIDE
+# define STRCAT strcat
+# define CHAR char
+# define sfmt "s"
+# define SIMPLE_STRCAT simple_strcat
+# define STRLEN strlen
+# define STRCMP strcmp
+# define BIG_CHAR CHAR_MAX
+# define SMALL_CHAR 127
+#else
+# include <wchar.h>
+# define STRCAT wcscat
+# define CHAR wchar_t
+# define sfmt "ls"
+# define SIMPLE_STRCAT simple_wcscat
+# define STRLEN wcslen
+# define STRCMP wcscmp
+# define BIG_CHAR WCHAR_MAX
+# define SMALL_CHAR 1273
+#endif /* WIDE */
+
+
+typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
+CHAR *SIMPLE_STRCAT (CHAR *, const CHAR *);
+
+IMPL (SIMPLE_STRCAT, 0)
+IMPL (STRCAT, 1)
+
+CHAR *
+SIMPLE_STRCAT (CHAR *dst, const CHAR *src)
 {
-  char *ret = dst;
+  CHAR *ret = dst;
   while (*dst++ != '\0');
   --dst;
   while ((*dst++ = *src++) != '\0');
@@ -37,9 +63,9 @@ simple_strcat (char *dst, const char *src)
 }
 
 static void
-do_one_test (impl_t *impl, char *dst, const char *src)
+do_one_test (impl_t *impl, CHAR *dst, const CHAR *src)
 {
-  size_t k = strlen (dst), i, iters = INNER_LOOP_ITERS;
+  size_t k = STRLEN (dst), i, iters = INNER_LOOP_ITERS;
   timing_t start, stop, cur;
 
   if (CALL (impl, dst, src) != dst)
@@ -50,9 +76,9 @@ do_one_test (impl_t *impl, char *dst, const char *src)
       return;
     }
 
-  if (strcmp (dst + k, src) != 0)
+  if (STRCMP (dst + k, src) != 0)
     {
-      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
+      error (0, 0, "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
 	     impl->name, dst, src);
       ret = 1;
       return;
@@ -75,18 +101,18 @@ static void
 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int max_char)
 {
   size_t i;
-  char *s1, *s2;
+  CHAR *s1, *s2;
 
   align1 &= 7;
-  if (align1 + len1 >= page_size)
+  if ((align1 + len1) * sizeof (CHAR) >= page_size)
     return;
 
   align2 &= 7;
-  if (align2 + len1 + len2 >= page_size)
+  if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
     return;
 
-  s1 = (char *) (buf1 + align1);
-  s2 = (char *) (buf2 + align2);
+  s1 = (CHAR *) (buf1) + align1;
+  s2 = (CHAR *) (buf2) + align2;
 
   for (i = 0; i < len1; ++i)
     s1[i] = 32 + 23 * i % (max_char - 32);
@@ -120,26 +146,26 @@ test_main (void)
 
   for (i = 0; i < 16; ++i)
     {
-      do_test (0, 0, i, i, 127);
-      do_test (0, 0, i, i, 255);
-      do_test (0, i, i, i, 127);
-      do_test (i, 0, i, i, 255);
+      do_test (0, 0, i, i, SMALL_CHAR);
+      do_test (0, 0, i, i, BIG_CHAR);
+      do_test (0, i, i, i, SMALL_CHAR);
+      do_test (i, 0, i, i, BIG_CHAR);
     }
 
   for (i = 1; i < 8; ++i)
     {
-      do_test (0, 0, 8 << i, 8 << i, 127);
-      do_test (8 - i, 2 * i, 8 << i, 8 << i, 127);
-      do_test (0, 0, 8 << i, 2 << i, 127);
-      do_test (8 - i, 2 * i, 8 << i, 2 << i, 127);
+      do_test (0, 0, 8 << i, 8 << i, SMALL_CHAR);
+      do_test (8 - i, 2 * i, 8 << i, 8 << i, SMALL_CHAR);
+      do_test (0, 0, 8 << i, 2 << i, SMALL_CHAR);
+      do_test (8 - i, 2 * i, 8 << i, 2 << i, SMALL_CHAR);
     }
 
   for (i = 1; i < 8; ++i)
     {
-      do_test (i, 2 * i, 8 << i, 1, 127);
-      do_test (2 * i, i, 8 << i, 1, 255);
-      do_test (i, i, 8 << i, 10, 127);
-      do_test (i, i, 8 << i, 10, 255);
+      do_test (i, 2 * i, 8 << i, 1, SMALL_CHAR);
+      do_test (2 * i, i, 8 << i, 1, BIG_CHAR);
+      do_test (i, i, 8 << i, 10, SMALL_CHAR);
+      do_test (i, i, 8 << i, 10, BIG_CHAR);
     }
 
   return ret;
diff --git a/benchtests/bench-wcscat.c b/benchtests/bench-wcscat.c
new file mode 100644
index 0000000000..cd0dbc00d6
--- /dev/null
+++ b/benchtests/bench-wcscat.c
@@ -0,0 +1,20 @@
+/* Measure wcscat functions.
+   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/>.  */
+
+#define WIDE 1
+#include "bench-strcat.c"
diff --git a/string/strcat.c b/string/strcat.c
index 6e1f1ab932..9d2e699fdb 100644
--- a/string/strcat.c
+++ b/string/strcat.c
@@ -19,9 +19,13 @@
 
 #undef strcat
 
+#ifndef STRCAT
+# define STRCAT strcat
+#endif
+
 /* Append SRC on the end of DEST.  */
 char *
-strcat (char *dest, const char *src)
+STRCAT (char *dest, const char *src)
 {
   strcpy (dest + strlen (dest), src);
   return dest;
diff --git a/string/test-strcat.c b/string/test-strcat.c
index 0a97e25484..22e67eef75 100644
--- a/string/test-strcat.c
+++ b/string/test-strcat.c
@@ -1,4 +1,4 @@
-/* Test and measure strcat functions.
+/* Test strcat functions.
    Copyright (C) 1999-2015 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
@@ -18,19 +18,52 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define TEST_MAIN
-#define TEST_NAME "strcat"
+#ifndef WIDE
+# define TEST_NAME "strcat"
+#else
+# define TEST_NAME "wcscat"
+#endif /* WIDE */
 #include "test-string.h"
 
-typedef char *(*proto_t) (char *, const char *);
-char *simple_strcat (char *, const char *);
+#ifndef WIDE
+# define STRCAT strcat
+# define CHAR char
+# define UCHAR unsigned char
+# define sfmt "s"
+# define SIMPLE_STRCAT simple_strcat
+# define STRLEN strlen
+# define STRCMP strcmp
+# define MEMSET memset
+# define MEMCPY memcpy
+# define MEMCMP memcmp
+# define BIG_CHAR CHAR_MAX
+# define SMALL_CHAR 127
+#else
+# include <wchar.h>
+# define STRCAT wcscat
+# define CHAR wchar_t
+# define UCHAR wchar_t
+# define sfmt "ls"
+# define SIMPLE_STRCAT simple_wcscat
+# define STRLEN wcslen
+# define STRCMP wcscmp
+# define MEMSET wmemset
+# define MEMCPY wmemcpy
+# define MEMCMP wmemcmp
+# define BIG_CHAR WCHAR_MAX
+# define SMALL_CHAR 1273
+#endif /* WIDE */
 
-IMPL (simple_strcat, 0)
-IMPL (strcat, 1)
+typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
+CHAR *SIMPLE_STRCAT (CHAR *, const CHAR *);
 
-char *
-simple_strcat (char *dst, const char *src)
+IMPL (SIMPLE_STRCAT, 0)
+IMPL (STRCAT, 1)
+
+CHAR *
+SIMPLE_STRCAT (CHAR *dst, const CHAR *src)
 {
-  char *ret = dst;
+  CHAR *ret = dst;
   while (*dst++ != '\0');
   --dst;
   while ((*dst++ = *src++) != '\0');
@@ -38,9 +71,9 @@ simple_strcat (char *dst, const char *src)
 }
 
 static void
-do_one_test (impl_t *impl, char *dst, const char *src)
+do_one_test (impl_t *impl, CHAR *dst, const CHAR *src)
 {
-  size_t k = strlen (dst);
+  size_t k = STRLEN (dst);
   if (CALL (impl, dst, src) != dst)
     {
       error (0, 0, "Wrong result in function %s %p %p", impl->name,
@@ -49,9 +82,9 @@ do_one_test (impl_t *impl, char *dst, const char *src)
       return;
     }
 
-  if (strcmp (dst + k, src) != 0)
+  if (STRCMP (dst + k, src) != 0)
     {
-      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
+      error (0, 0, "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
 	     impl->name, dst, src);
       ret = 1;
       return;
@@ -62,18 +95,18 @@ static void
 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int max_char)
 {
   size_t i;
-  char *s1, *s2;
+  CHAR *s1, *s2;
 
   align1 &= 7;
-  if (align1 + len1 >= page_size)
+  if ((align1 + len1) * sizeof (CHAR) >= page_size)
     return;
 
   align2 &= 7;
-  if (align2 + len1 + len2 >= page_size)
+  if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
     return;
 
-  s1 = (char *) (buf1 + align1);
-  s2 = (char *) (buf2 + align2);
+  s1 = (CHAR *) (buf1) + align1;
+  s2 = (CHAR *) (buf2) + align2;
 
   for (i = 0; i < len1; ++i)
     s1[i] = 32 + 23 * i % (max_char - 32);
@@ -93,9 +126,10 @@ static void
 do_random_tests (void)
 {
   size_t i, j, n, align1, align2, len1, len2;
-  unsigned char *p1 = buf1 + page_size - 512;
-  unsigned char *p2 = buf2 + page_size - 512;
-  unsigned char *res;
+  UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
+  UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
+  UCHAR *p3 = (UCHAR *) buf1;
+  UCHAR *res;
 
   for (n = 0; n < ITERATIONS; n++)
     {
@@ -132,26 +166,26 @@ do_random_tests (void)
 	    p1[i] = 0;
 	  else
 	    {
-	      p1[i] = random () & 255;
+	      p1[i] = random () & BIG_CHAR;
 	      if (i >= align1 && i < len1 + align1 && !p1[i])
-		p1[i] = (random () & 127) + 3;
+		p1[i] = (random () & SMALL_CHAR) + 3;
 	    }
 	}
       for (i = 0; i < len2; i++)
 	{
-	  buf1[i] = random () & 255;
-	  if (!buf1[i])
-	    buf1[i] = (random () & 127) + 3;
+	  p3[i] = random () & BIG_CHAR;
+	  if (!p3[i])
+	    p3[i] = (random () & SMALL_CHAR) + 3;
 	}
-      buf1[len2] = 0;
+      p3[len2] = 0;
 
       FOR_EACH_IMPL (impl, 1)
 	{
-	  memset (p2 - 64, '\1', align2 + 64);
-	  memset (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
-	  memcpy (p2 + align2, buf1, len2 + 1);
-	  res = (unsigned char *) CALL (impl, (char *) (p2 + align2),
-					(char *) (p1 + align1));
+	  MEMSET (p2 - 64, '\1', align2 + 64);
+	  MEMSET (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
+	  MEMCPY (p2 + align2, p3, len2 + 1);
+	  res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2),
+				(CHAR *) (p1 + align1));
 	  if (res != p2 + align2)
 	    {
 	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd %zd) %p != %p",
@@ -169,7 +203,7 @@ do_random_tests (void)
 		  break;
 		}
 	    }
-	  if (memcmp (p2 + align2, buf1, len2))
+	  if (MEMCMP (p2 + align2, p3, len2))
 	    {
 	      error (0, 0, "Iteration %zd - garbage in string before, %s (%zd, %zd, %zd, %zd)",
 		     n, impl->name, align1, align2, len1, len2);
@@ -185,7 +219,7 @@ do_random_tests (void)
 		  break;
 		}
 	    }
-	  if (memcmp (p1 + align1, p2 + align2 + len2, len1 + 1))
+	  if (MEMCMP (p1 + align1, p2 + align2 + len2, len1 + 1))
 	    {
 	      error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd, %zd)",
 		     n, impl->name, align1, align2, len1, len2);
@@ -209,26 +243,26 @@ test_main (void)
 
   for (i = 0; i < 16; ++i)
     {
-      do_test (0, 0, i, i, 127);
-      do_test (0, 0, i, i, 255);
-      do_test (0, i, i, i, 127);
-      do_test (i, 0, i, i, 255);
+      do_test (0, 0, i, i, SMALL_CHAR);
+      do_test (0, 0, i, i, BIG_CHAR);
+      do_test (0, i, i, i, SMALL_CHAR);
+      do_test (i, 0, i, i, BIG_CHAR);
     }
 
   for (i = 1; i < 8; ++i)
     {
-      do_test (0, 0, 8 << i, 8 << i, 127);
-      do_test (8 - i, 2 * i, 8 << i, 8 << i, 127);
-      do_test (0, 0, 8 << i, 2 << i, 127);
-      do_test (8 - i, 2 * i, 8 << i, 2 << i, 127);
+      do_test (0, 0, 8 << i, 8 << i, SMALL_CHAR);
+      do_test (8 - i, 2 * i, 8 << i, 8 << i, SMALL_CHAR);
+      do_test (0, 0, 8 << i, 2 << i, SMALL_CHAR);
+      do_test (8 - i, 2 * i, 8 << i, 2 << i, SMALL_CHAR);
     }
 
   for (i = 1; i < 8; ++i)
     {
-      do_test (i, 2 * i, 8 << i, 1, 127);
-      do_test (2 * i, i, 8 << i, 1, 255);
-      do_test (i, i, 8 << i, 10, 127);
-      do_test (i, i, 8 << i, 10, 255);
+      do_test (i, 2 * i, 8 << i, 1, SMALL_CHAR);
+      do_test (2 * i, i, 8 << i, 1, BIG_CHAR);
+      do_test (i, i, 8 << i, 10, SMALL_CHAR);
+      do_test (i, i, 8 << i, 10, BIG_CHAR);
     }
 
   do_random_tests ();
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 98b588f1f2..6283999faa 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -4,7 +4,8 @@ sysdep_routines += strlen strlen-vx strlen-c \
 		   strcpy strcpy-vx \
 		   stpcpy stpcpy-vx stpcpy-c \
 		   strncpy strncpy-vx \
-		   stpncpy stpncpy-vx stpncpy-c
+		   stpncpy stpncpy-vx stpncpy-c \
+		   strcat strcat-vx strcat-c
 endif
 
 ifeq ($(subdir),wcsmbs)
@@ -13,5 +14,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
 		   wcscpy wcscpy-vx wcscpy-c \
 		   wcpcpy wcpcpy-vx wcpcpy-c \
 		   wcsncpy wcsncpy-vx wcsncpy-c \
-		   wcpncpy wcpncpy-vx wcpncpy-c
+		   wcpncpy wcpncpy-vx wcpncpy-c \
+		   wcscat wcscat-vx wcscat-c
 endif
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index ca69983466..ccf4dea198 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -97,6 +97,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_VX_IMPL (stpncpy);
   IFUNC_VX_IMPL (wcpncpy);
 
+  IFUNC_VX_IMPL (strcat);
+  IFUNC_VX_IMPL (wcscat);
+
 #endif /* HAVE_S390_VX_ASM_SUPPORT */
 
   return i;
diff --git a/sysdeps/s390/multiarch/strcat-c.c b/sysdeps/s390/multiarch/strcat-c.c
new file mode 100644
index 0000000000..51c12e375f
--- /dev/null
+++ b/sysdeps/s390/multiarch/strcat-c.c
@@ -0,0 +1,28 @@
+/* Default strcat implementation for S/390.
+   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)
+# define STRCAT  __strcat_c
+# ifdef SHARED
+#  undef libc_hidden_builtin_def
+#  define libc_hidden_builtin_def(name)				\
+     __hidden_ver1 (__strcat_c, __GI_strcat, __strcat_c);
+# endif /* SHARED */
+
+# include <string/strcat.c>
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/strcat-vx.S b/sysdeps/s390/multiarch/strcat-vx.S
new file mode 100644
index 0000000000..ba553bec26
--- /dev/null
+++ b/sysdeps/s390/multiarch/strcat-vx.S
@@ -0,0 +1,161 @@
+/* Vector optimized 32/64 bit S/390 version of strcat.
+   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