S390: Optimize strpbrk and wcspbrk.

This patch provides optimized versions of strpbrk and wcspbrk with the z13
vector instructions.

ChangeLog:

	* sysdeps/s390/multiarch/strpbrk-c.c: New File.
	* sysdeps/s390/multiarch/strpbrk-vx.S: Likewise.
	* sysdeps/s390/multiarch/strpbrk.c: Likewise.
	* sysdeps/s390/multiarch/wcspbrk-c.c: Likewise.
	* sysdeps/s390/multiarch/wcspbrk-vx.S: Likewise.
	* sysdeps/s390/multiarch/wcspbrk.c: Likewise.
	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strpbrk and
	wcspbrk functions.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Add ifunc test for strpbrk, wcspbrk.
	* wcsmbs/wcspbrk.c: Use WCSPBRK if defined.
	* string/test-strpbrk.c: Add wcspbrk support.
	* wcsmbs/test-wcspbrk.c: New File.
	* wcsmbs/Makefile (strop-tests): Add wcspbrk.
	* benchtests/bench-strpbrk.c: Add wcspbrk support.
	* benchtests/bench-wcspbrk.c: New File.
	* benchtests/Makefile (wcsmbs-bench): Add wcspbrk.

16 files changed, 948 insertions, 88 deletions

diff --git a/ChangeLog b/ChangeLog
index e16f354ed8..49d67045d3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,25 @@
 2015-08-26  Stefan Liebler  <stli@linux.vnet.ibm.com>
 
+	* sysdeps/s390/multiarch/strpbrk-c.c: New File.
+	* sysdeps/s390/multiarch/strpbrk-vx.S: Likewise.
+	* sysdeps/s390/multiarch/strpbrk.c: Likewise.
+	* sysdeps/s390/multiarch/wcspbrk-c.c: Likewise.
+	* sysdeps/s390/multiarch/wcspbrk-vx.S: Likewise.
+	* sysdeps/s390/multiarch/wcspbrk.c: Likewise.
+	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strpbrk and
+	wcspbrk functions.
+	* sysdeps/s390/multiarch/ifunc-impl-list.c
+	(__libc_ifunc_impl_list): Add ifunc test for strpbrk, wcspbrk.
+	* wcsmbs/wcspbrk.c: Use WCSPBRK if defined.
+	* string/test-strpbrk.c: Add wcspbrk support.
+	* wcsmbs/test-wcspbrk.c: New File.
+	* wcsmbs/Makefile (strop-tests): Add wcspbrk.
+	* benchtests/bench-strpbrk.c: Add wcspbrk support.
+	* benchtests/bench-wcspbrk.c: New File.
+	* benchtests/Makefile (wcsmbs-bench): Add wcspbrk.
+
+2015-08-26  Stefan Liebler  <stli@linux.vnet.ibm.com>
+
 	* sysdeps/s390/multiarch/strspn-c.c: New File.
 	* sysdeps/s390/multiarch/strspn-vx.S: Likewise.
 	* sysdeps/s390/multiarch/strspn.c: Likewise.
diff --git a/benchtests/Makefile b/benchtests/Makefile
index f00196b55a..f882f984ef 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -37,7 +37,7 @@ string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
 		strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \
 		strcoll
 wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat \
-		wcscmp wcsncmp wcschr wcschrnul wcsrchr wcsspn
+		wcscmp wcsncmp wcschr wcschrnul wcsrchr wcsspn wcspbrk
 string-bench-all := $(string-bench) ${wcsmbs-bench}
 
 # We have to generate locales
diff --git a/benchtests/bench-strpbrk.c b/benchtests/bench-strpbrk.c
index a3bc8d6836..eb09a1370c 100644
--- a/benchtests/bench-strpbrk.c
+++ b/benchtests/bench-strpbrk.c
@@ -16,50 +16,80 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#ifndef WIDE
+# define CHAR char
+# define STRLEN strlen
+# define STRCHR strchr
+# define BIG_CHAR CHAR_MAX
+# define SMALL_CHAR 127
+#else
+# include <wchar.h>
+# define CHAR wchar_t
+# define STRLEN wcslen
+# define STRCHR wcschr
+# define BIG_CHAR WCHAR_MAX
+# define SMALL_CHAR 1273
+#endif /* WIDE */
+
 #ifndef STRPBRK_RESULT
 # define STRPBRK_RESULT(s, pos) ((s)[(pos)] ? (s) + (pos) : NULL)
-# define RES_TYPE char *
+# define RES_TYPE CHAR *
 # define TEST_MAIN
-# define TEST_NAME "strpbrk"
+# ifndef WIDE
+#  define TEST_NAME "strpbrk"
+# else
+#  define TEST_NAME "wcspbrk"
+# endif /* WIDE */
 # include "bench-string.h"
 
-typedef char *(*proto_t) (const char *, const char *);
-char *simple_strpbrk (const char *, const char *);
-char *stupid_strpbrk (const char *, const char *);
-
-IMPL (stupid_strpbrk, 0)
-IMPL (simple_strpbrk, 0)
-IMPL (strpbrk, 1)
-
-char *
-simple_strpbrk (const char *s, const char *rej)
+# ifndef WIDE
+#  define STRPBRK strpbrk
+#  define SIMPLE_STRPBRK simple_strpbrk
+#  define STUPID_STRPBRK stupid_strpbrk
+# else
+#  include <wchar.h>
+#  define STRPBRK wcspbrk
+#  define SIMPLE_STRPBRK simple_wcspbrk
+#  define STUPID_STRPBRK stupid_wcspbrk
+# endif /* WIDE */
+
+typedef CHAR *(*proto_t) (const CHAR *, const CHAR *);
+CHAR *SIMPLE_STRPBRK (const CHAR *, const CHAR *);
+CHAR *STUPID_STRPBRK (const CHAR *, const CHAR *);
+
+IMPL (STUPID_STRPBRK, 0)
+IMPL (SIMPLE_STRPBRK, 0)
+IMPL (STRPBRK, 1)
+
+CHAR *
+SIMPLE_STRPBRK (const CHAR *s, const CHAR *rej)
 {
-  const char *r;
-  char c;
+  const CHAR *r;
+  CHAR c;
 
   while ((c = *s++) != '\0')
     for (r = rej; *r != '\0'; ++r)
       if (*r == c)
-	return (char *) s - 1;
+	return (CHAR *) s - 1;
   return NULL;
 }
 
-char *
-stupid_strpbrk (const char *s, const char *rej)
+CHAR *
+STUPID_STRPBRK (const CHAR *s, const CHAR *rej)
 {
-  size_t ns = strlen (s), nrej = strlen (rej);
+  size_t ns = STRLEN (s), nrej = STRLEN (rej);
   size_t i, j;
 
   for (i = 0; i < ns; ++i)
     for (j = 0; j < nrej; ++j)
       if (s[i] == rej[j])
-	return (char *) s + i;
+	return (CHAR *) s + i;
   return NULL;
 }
-#endif
+#endif /* !STRPBRK_RESULT */
 
 static void
-do_one_test (impl_t *impl, const char *s, const char *rej, RES_TYPE exp_res)
+do_one_test (impl_t *impl, const CHAR *s, const CHAR *rej, RES_TYPE exp_res)
 {
   RES_TYPE res = CALL (impl, s, rej);
   size_t i, iters = INNER_LOOP_ITERS;
@@ -91,35 +121,35 @@ do_test (size_t align, size_t pos, size_t len)
   size_t i;
   int c;
   RES_TYPE result;
-  char *rej, *s;
+  CHAR *rej, *s;
 
   align &= 7;
-  if (align + pos + 10 >= page_size || len > 240)
+  if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240)
     return;
 
-  rej = (char *) (buf2 + (random () & 255));
-  s = (char *) (buf1 + align);
+  rej = (CHAR *) (buf2) + (random () & 255);
+  s = (CHAR *) (buf1) + align;
 
   for (i = 0; i < len; ++i)
     {
-      rej[i] = random () & 255;
+      rej[i] = random () & BIG_CHAR;
       if (!rej[i])
-	rej[i] = random () & 255;
+	rej[i] = random () & BIG_CHAR;
       if (!rej[i])
-	rej[i] = 1 + (random () & 127);
+	rej[i] = 1 + (random () & SMALL_CHAR);
     }
   rej[len] = '\0';
-  for (c = 1; c <= 255; ++c)
-    if (strchr (rej, c) == NULL)
+  for (c = 1; c <= BIG_CHAR; ++c)
+    if (STRCHR (rej, c) == NULL)
       break;
 
   for (i = 0; i < pos; ++i)
     {
-      s[i] = random () & 255;
-      if (strchr (rej, s[i]))
+      s[i] = random () & BIG_CHAR;
+      if (STRCHR (rej, s[i]))
 	{
-	  s[i] = random () & 255;
-	  if (strchr (rej, s[i]))
+	  s[i] = random () & BIG_CHAR;
+	  if (STRCHR (rej, s[i]))
 	    s[i] = c;
 	}
     }
@@ -127,7 +157,7 @@ do_test (size_t align, size_t pos, size_t len)
   if (s[pos])
     {
       for (i = pos + 1; i < pos + 10; ++i)
-	s[i] = random () & 255;
+	s[i] = random () & BIG_CHAR;
       s[i] = '\0';
     }
   result = STRPBRK_RESULT (s, pos);
diff --git a/benchtests/bench-wcspbrk.c b/benchtests/bench-wcspbrk.c
new file mode 100644
index 0000000000..3d9f00fca5
--- /dev/null
+++ b/benchtests/bench-wcspbrk.c
@@ -0,0 +1,20 @@
+/* Measure wcspbrk 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-strpbrk.c"
diff --git a/string/test-strpbrk.c b/string/test-strpbrk.c
index b4ac389a71..a4dffe7d15 100644
--- a/string/test-strpbrk.c
+++ b/string/test-strpbrk.c
@@ -17,50 +17,82 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#ifndef WIDE
+# define CHAR char
+# define UCHAR unsigned char
+# define STRLEN strlen
+# define STRCHR strchr
+# define BIG_CHAR CHAR_MAX
+# define SMALL_CHAR 127
+#else
+# include <wchar.h>
+# define CHAR wchar_t
+# define UCHAR wchar_t
+# define STRLEN wcslen
+# define STRCHR wcschr
+# define BIG_CHAR WCHAR_MAX
+# define SMALL_CHAR 1273
+#endif /* WIDE */
+
 #ifndef STRPBRK_RESULT
 # define STRPBRK_RESULT(s, pos) ((s)[(pos)] ? (s) + (pos) : NULL)
-# define RES_TYPE char *
+# define RES_TYPE CHAR *
 # define TEST_MAIN
-# define TEST_NAME "strpbrk"
+# ifndef WIDE
+#  define TEST_NAME "strpbrk"
+# else
+#  define TEST_NAME "wcspbrk"
+# endif /* WIDE */
 # include "test-string.h"
 
-typedef char *(*proto_t) (const char *, const char *);
-char *simple_strpbrk (const char *, const char *);
-char *stupid_strpbrk (const char *, const char *);
+# ifndef WIDE
+#  define STRPBRK strpbrk
+#  define SIMPLE_STRPBRK simple_strpbrk
+#  define STUPID_STRPBRK stupid_strpbrk
+# else
+#  include <wchar.h>
+#  define STRPBRK wcspbrk
+#  define SIMPLE_STRPBRK simple_wcspbrk
+#  define STUPID_STRPBRK stupid_wcspbrk
+# endif /* WIDE */
+
+typedef CHAR *(*proto_t) (const CHAR *, const CHAR *);
+CHAR *SIMPLE_STRPBRK (const CHAR *, const CHAR *);
+CHAR *STUPID_STRPBRK (const CHAR *, const CHAR *);
 
-IMPL (stupid_strpbrk, 0)
-IMPL (simple_strpbrk, 0)
-IMPL (strpbrk, 1)
+IMPL (STUPID_STRPBRK, 0)
+IMPL (SIMPLE_STRPBRK, 0)
+IMPL (STRPBRK, 1)
 
-char *
-simple_strpbrk (const char *s, const char *rej)
+CHAR *
+SIMPLE_STRPBRK (const CHAR *s, const CHAR *rej)
 {
-  const char *r;
-  char c;
+  const CHAR *r;
+  CHAR c;
 
   while ((c = *s++) != '\0')
     for (r = rej; *r != '\0'; ++r)
       if (*r == c)
-	return (char *) s - 1;
+	return (CHAR *) s - 1;
   return NULL;
 }
 
-char *
-stupid_strpbrk (const char *s, const char *rej)
+CHAR *
+STUPID_STRPBRK (const CHAR *s, const CHAR *rej)
 {
-  size_t ns = strlen (s), nrej = strlen (rej);
+  size_t ns = STRLEN (s), nrej = STRLEN (rej);
   size_t i, j;
 
   for (i = 0; i < ns; ++i)
     for (j = 0; j < nrej; ++j)
       if (s[i] == rej[j])
-	return (char *) s + i;
+	return (CHAR *) s + i;
   return NULL;
 }
-#endif
+#endif /* !STRPBRK_RESULT */
 
 static void
-do_one_test (impl_t *impl, const char *s, const char *rej, RES_TYPE exp_res)
+do_one_test (impl_t *impl, const CHAR *s, const CHAR *rej, RES_TYPE exp_res)
 {
   RES_TYPE res = CALL (impl, s, rej);
   if (res != exp_res)
@@ -78,35 +110,35 @@ do_test (size_t align, size_t pos, size_t len)
   size_t i;
   int c;
   RES_TYPE result;
-  char *rej, *s;
+  CHAR *rej, *s;
 
   align &= 7;
-  if (align + pos + 10 >= page_size || len > 240)
+  if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240)
     return;
 
-  rej = (char *) (buf2 + (random () & 255));
-  s = (char *) (buf1 + align);
+  rej = (CHAR *) (buf2) + (random () & 255);
+  s = (CHAR *) (buf1) + align;
 
   for (i = 0; i < len; ++i)
     {
-      rej[i] = random () & 255;
+      rej[i] = random () & BIG_CHAR;
       if (!rej[i])
-	rej[i] = random () & 255;
+	rej[i] = random () & BIG_CHAR;
       if (!rej[i])
-	rej[i] = 1 + (random () & 127);
+	rej[i] = 1 + (random () & SMALL_CHAR);
     }
   rej[len] = '\0';
-  for (c = 1; c <= 255; ++c)
-    if (strchr (rej, c) == NULL)
+  for (c = 1; c <= BIG_CHAR; ++c)
+    if (STRCHR (rej, c) == NULL)
       break;
 
   for (i = 0; i < pos; ++i)
     {
-      s[i] = random () & 255;
-      if (strchr (rej, s[i]))
+      s[i] = random () & BIG_CHAR;
+      if (STRCHR (rej, s[i]))
 	{
-	  s[i] = random () & 255;
-	  if (strchr (rej, s[i]))
+	  s[i] = random () & BIG_CHAR;
+	  if (STRCHR (rej, s[i]))
 	    s[i] = c;
 	}
     }
@@ -114,7 +146,7 @@ do_test (size_t align, size_t pos, size_t len)
   if (s[pos])
     {
       for (i = pos + 1; i < pos + 10; ++i)
-	s[i] = random () & 255;
+	s[i] = random () & BIG_CHAR;
       s[i] = '\0';
     }
   result = STRPBRK_RESULT (s, pos);
@@ -129,8 +161,8 @@ do_random_tests (void)
   size_t i, j, n, align, pos, len, rlen;
   RES_TYPE result;
   int c;
-  unsigned char *p = buf1 + page_size - 512;
-  unsigned char *rej;
+  UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
+  UCHAR *rej;
 
   for (n = 0; n < ITERATIONS; n++)
     {
@@ -147,18 +179,18 @@ do_random_tests (void)
 	rlen = random () & 63;
       else
 	rlen = random () & 15;
-      rej = buf2 + page_size - rlen - 1 - (random () & 7);
+      rej = (UCHAR *) (buf2 + page_size) - rlen - 1 - (random () & 7);
       for (i = 0; i < rlen; ++i)
 	{
-	  rej[i] = random () & 255;
+	  rej[i] = random () & BIG_CHAR;
 	  if (!rej[i])
-	    rej[i] = random () & 255;
+	    rej[i] = random () & BIG_CHAR;
 	  if (!rej[i])
-	    rej[i] = 1 + (random () & 127);
+	    rej[i] = 1 + (random () & SMALL_CHAR);
 	}
       rej[i] = '\0';
-      for (c = 1; c <= 255; ++c)
-	if (strchr ((char *) rej, c) == NULL)
+      for (c = 1; c <= BIG_CHAR; ++c)
+	if (STRCHR ((CHAR *) rej, c) == NULL)
 	  break;
       j = (pos > len ? pos : len) + align + 64;
       if (j > 512)
@@ -171,27 +203,27 @@ do_random_tests (void)
 	  else if (i == pos + align)
 	    p[i] = rej[random () % (rlen + 1)];
 	  else if (i < align || i > pos + align)
-	    p[i] = random () & 255;
+	    p[i] = random () & BIG_CHAR;
 	  else
 	    {
-	      p[i] = random () & 255;
-	      if (strchr ((char *) rej, p[i]))
+	      p[i] = random () & BIG_CHAR;
+	      if (STRCHR ((CHAR *) rej, p[i]))
 		{
-		  p[i] = random () & 255;
-		  if (strchr ((char *) rej, p[i]))
+		  p[i] = random () & BIG_CHAR;
+		  if (STRCHR ((CHAR *) rej, p[i]))
 		    p[i] = c;
 		}
 	    }
 	}
 
-      result = STRPBRK_RESULT ((char *) (p + align), pos < len ? pos : len);
+      result = STRPBRK_RESULT ((CHAR *) (p + align), pos < len ? pos : len);
 
       FOR_EACH_IMPL (impl, 1)
-	if (CALL (impl, (char *) (p + align), (char *) rej) != result)
+	if (CALL (impl, (CHAR *) (p + align), (CHAR *) rej) != result)
 	  {
 	    error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %p, %zd, %zd, %zd) %p != %p",
 		   n, impl->name, align, rej, rlen, pos, len,
-		   (void *) CALL (impl, (char *) (p + align), (char *) rej),
+		   (void *) CALL (impl, (CHAR *) (p + align), (CHAR *) rej),
 		   (void *) result);
 	    ret = 1;
 	  }
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 94031693aa..5765a8cfdc 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -12,7 +12,8 @@ sysdep_routines += strlen strlen-vx strlen-c \
 		   strchr strchr-vx strchr-c \
 		   strchrnul strchrnul-vx strchrnul-c \
 		   strrchr strrchr-vx strrchr-c \
-		   strspn strspn-vx strspn-c
+		   strspn strspn-vx strspn-c \
+		   strpbrk strpbrk-vx strpbrk-c
 endif
 
 ifeq ($(subdir),wcsmbs)
@@ -29,5 +30,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
 		   wcschr wcschr-vx wcschr-c \
 		   wcschrnul wcschrnul-vx wcschrnul-c \
 		   wcsrchr wcsrchr-vx wcsrchr-c \
-		   wcsspn wcsspn-vx wcsspn-c
+		   wcsspn wcsspn-vx wcsspn-c \
+		   wcspbrk wcspbrk-vx wcspbrk-c
 endif
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index cbedf64025..b39a5c54c7 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -121,6 +121,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_VX_IMPL (strspn);
   IFUNC_VX_IMPL (wcsspn);
 
+  IFUNC_VX_IMPL (strpbrk);
+  IFUNC_VX_IMPL (wcspbrk);
+
 #endif /* HAVE_S390_VX_ASM_SUPPORT */
 
   return i;
diff --git a/sysdeps/s390/multiarch/strpbrk-c.c b/sysdeps/s390/multiarch/strpbrk-c.c
new file mode 100644
index 0000000000..3923ae8031
--- /dev/null
+++ b/sysdeps/s390/multiarch/strpbrk-c.c
@@ -0,0 +1,28 @@
+/* Default strpbrk 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 STRPBRK  __strpbrk_c
+# ifdef SHARED
+#  undef libc_hidden_builtin_def
+#  define libc_hidden_builtin_def(name)				\
+     __hidden_ver1 (__strpbrk_c, __GI_strpbrk, __strpbrk_c);
+# endif /* SHARED */
+
+# include <string/strpbrk.c>
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/strpbrk-vx.S b/sysdeps/s390/multiarch/strpbrk-vx.S
new file mode 100644
index 0000000000..907143be80
--- /dev/null
+++ b/sysdeps/s390/multiarch/strpbrk-vx.S
@@ -0,0 +1,302 @@
+/* Vector optimized 32/64 bit S/390 version of strpbrk.
+   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 "sysdep.h"
+# include "asm-syntax.h"
+
+	.text
+
+/* char *strpbrk (const char *s, const char * accept)
+   The  strpbrk()  function locates the first occurrence in the string s
+   of any of the characters in the string accept and returns a pointer
+   to that character or NULL if not found.
+
+   This method checks the length of accept string. If it fits entirely
+   in one vector register, a fast algorithm is used, which does not need
+   to check multiple parts of accept-string. Otherwise a slower full
+   check of accept-string is used.
+
+   register overview:
+   r3:  pointer to start of accept-string
+   r2:  pointer to start of search-string
+   r0:  loaded byte count of vlbb search-string (32bit unsigned)
+   r4:  found byte index (32bit unsigned)
+   r1:  current return len (64bit unsigned)</