From 6be435ec4f615266351487da396333f3ff026c03 Mon Sep 17 00:00:00 2001

From: Stefan Liebler <stli@linux.vnet.ibm.com>

Date: Thu, 8 Oct 2015 13:02:41 +0200

Subject: [PATCH 25/30] S390: Optimize strcspn and wcscspn.

upstream-commit-id: b4c21601b147efc3c2b0e679e4ffc554b3987f0b

https://www.sourceware.org/ml/libc-alpha/2015-07/msg00099.html

This patch provides optimized versions of strcspn and wcscspn with the z13

vector instructions.

ChangeLog:

	* sysdeps/s390/multiarch/strcspn-c.c: New File.

	* sysdeps/s390/multiarch/strcspn-vx.S: Likewise.

	* sysdeps/s390/multiarch/strcspn.c: Likewise.

	* sysdeps/s390/multiarch/wcscspn-c.c: Likewise.

	* sysdeps/s390/multiarch/wcscspn-vx.S: Likewise.

	* sysdeps/s390/multiarch/wcscspn.c: Likewise.

	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strcspn and

	wcscspn functions.

	* sysdeps/s390/multiarch/ifunc-impl-list.c

	(__libc_ifunc_impl_list): Add ifunc test for strcspn, wcscspn.

	* wcsmbs/wcscspn.c: Use WCSCSPN if defined.

	* string/test-strcspn.c: Add wcscspn support.

	* wcsmbs/test-wcscspn.c: New File.

	* wcsmbs/Makefile (strop-tests): Add wcscspn.

	* benchtests/bench-strcspn.c: Add wcscspn support.

	* benchtests/bench-wcscspn.c: New File.

	* benchtests/Makefile (wcsmbs-bench): Add wcscspn.

---

 benchtests/Makefile                      |   2 +-

 benchtests/bench-strcspn.c               |  45 +++--

 benchtests/bench-wcscspn.c               |  20 +++

 string/strcspn.c                         |   8 +-

 string/test-strcspn.c                    |  45 +++--

 sysdeps/s390/multiarch/Makefile          |   6 +-

 sysdeps/s390/multiarch/ifunc-impl-list.c |   3 +

 sysdeps/s390/multiarch/strcspn-c.c       |  28 +++

 sysdeps/s390/multiarch/strcspn-vx.S      | 281 +++++++++++++++++++++++++++++

 sysdeps/s390/multiarch/strcspn.c         |  27 +++

 sysdeps/s390/multiarch/wcscspn-c.c       |  26 +++

 sysdeps/s390/multiarch/wcscspn-vx.S      | 293 +++++++++++++++++++++++++++++++

 sysdeps/s390/multiarch/wcscspn.c         |  27 +++

 wcsmbs/Makefile                          |   3 +-

 wcsmbs/test-wcscspn-ifunc.c              |  20 +++

 wcsmbs/test-wcscspn.c                    |  20 +++

 wcsmbs/wcscspn.c                         |   3 +

 17 files changed, 826 insertions(+), 31 deletions(-)

 create mode 100644 benchtests/bench-wcscspn.c

 create mode 100644 sysdeps/s390/multiarch/strcspn-c.c

 create mode 100644 sysdeps/s390/multiarch/strcspn-vx.S

 create mode 100644 sysdeps/s390/multiarch/strcspn.c

 create mode 100644 sysdeps/s390/multiarch/wcscspn-c.c

 create mode 100644 sysdeps/s390/multiarch/wcscspn-vx.S

 create mode 100644 sysdeps/s390/multiarch/wcscspn.c

 create mode 100644 wcsmbs/test-wcscspn-ifunc.c

 create mode 100644 wcsmbs/test-wcscspn.c

diff --git a/benchtests/Makefile b/benchtests/Makefile

index 015b5d6..4e811a9 100644

--- a/benchtests/Makefile

+++ b/benchtests/Makefile

@@ -39,7 +39,7 @@ 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

 wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat \

-		wcsncmp wcsncmp wcschr wcschrnul wcsrchr wcsspn wcspbrk

+		wcsncmp wcsncmp wcschr wcschrnul wcsrchr wcsspn wcspbrk wcscspn

 string-bench-all := $(string-bench) ${wcsmbs-bench}

 stdlib-bench := strtod

diff --git a/benchtests/bench-strcspn.c b/benchtests/bench-strcspn.c

index 22b3b84..25de640 100644

--- a/benchtests/bench-strcspn.c

+++ b/benchtests/bench-strcspn.c

@@ -19,22 +19,41 @@

 #define STRPBRK_RESULT(s, pos) (pos)

 #define RES_TYPE size_t

 #define TEST_MAIN

-#define TEST_NAME "strcspn"

+#ifndef WIDE

+# define TEST_NAME "strcspn"

+#else

+# define TEST_NAME "wcscspn"

+#endif /* WIDE */

 #include "bench-string.h"

-typedef size_t (*proto_t) (const char *, const char *);

-size_t simple_strcspn (const char *, const char *);

-size_t stupid_strcspn (const char *, const char *);

+#ifndef WIDE

+# define STRCSPN strcspn

+# define CHAR char

+# define SIMPLE_STRCSPN simple_strcspn

+# define STUPID_STRCSPN stupid_strcspn

+# define STRLEN strlen

+#else

+# include <wchar.h>

+# define STRCSPN wcscspn

+# define CHAR wchar_t

+# define SIMPLE_STRCSPN simple_wcscspn

+# define STUPID_STRCSPN stupid_wcscspn

+# define STRLEN wcslen

+#endif /* WIDE */

-IMPL (stupid_strcspn, 0)

-IMPL (simple_strcspn, 0)

-IMPL (strcspn, 1)

+typedef size_t (*proto_t) (const CHAR *, const CHAR *);

+size_t SIMPLE_STRCSPN (const CHAR *, const CHAR *);

+size_t STUPID_STRCSPN (const CHAR *, const CHAR *);

+

+IMPL (STUPID_STRCSPN, 0)

+IMPL (SIMPLE_STRCSPN, 0)

+IMPL (STRCSPN, 1)

 size_t

-simple_strcspn (const char *s, const char *rej)

+SIMPLE_STRCSPN (const CHAR *s, const CHAR *rej)

 {

-  const char *r, *str = s;

-  char c;

+  const CHAR *r, *str = s;

+  CHAR c;

   while ((c = *s++) != '\0')

     for (r = rej; *r != '\0'; ++r)

@@ -44,9 +63,9 @@ simple_strcspn (const char *s, const char *rej)

 }

 size_t

-stupid_strcspn (const char *s, const char *rej)

+STUPID_STRCSPN (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)

@@ -56,4 +75,6 @@ stupid_strcspn (const char *s, const char *rej)

   return i;

 }

+#undef CHAR

+#undef STRLEN

 #include "bench-strpbrk.c"

diff --git a/benchtests/bench-wcscspn.c b/benchtests/bench-wcscspn.c

new file mode 100644

index 0000000..3991951

--- /dev/null

+++ b/benchtests/bench-wcscspn.c

@@ -0,0 +1,20 @@

+/* Measure wcscspn 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-strcspn.c"

diff --git a/string/strcspn.c b/string/strcspn.c

index 6290429..0c750a8 100644

--- a/string/strcspn.c

+++ b/string/strcspn.c

@@ -30,12 +30,14 @@

 #undef strcspn

+#ifndef STRCSPN

+# define STRCSPN strcspn

+#endif

+

 /* Return the length of the maximum initial segment of S

    which contains no characters from REJECT.  */

 size_t

-strcspn (s, reject)

-     const char *s;

-     const char *reject;

+STRCSPN (const char *s, const char *reject)

 {

   size_t count = 0;

diff --git a/string/test-strcspn.c b/string/test-strcspn.c

index e2863c7..3443425 100644

--- a/string/test-strcspn.c

+++ b/string/test-strcspn.c

@@ -20,22 +20,41 @@

 #define STRPBRK_RESULT(s, pos) (pos)

 #define RES_TYPE size_t

 #define TEST_MAIN

-#define TEST_NAME "strcspn"

+#ifndef WIDE

+# define TEST_NAME "strcspn"

+#else

+# define TEST_NAME "wcscspn"

+#endif /* WIDE */

 #include "test-string.h"

-typedef size_t (*proto_t) (const char *, const char *);

-size_t simple_strcspn (const char *, const char *);

-size_t stupid_strcspn (const char *, const char *);

+#ifndef WIDE

+# define STRCSPN strcspn

+# define CHAR char

+# define SIMPLE_STRCSPN simple_strcspn

+# define STUPID_STRCSPN stupid_strcspn

+# define STRLEN strlen

+#else

+# include <wchar.h>

+# define STRCSPN wcscspn

+# define CHAR wchar_t

+# define SIMPLE_STRCSPN simple_wcscspn

+# define STUPID_STRCSPN stupid_wcscspn

+# define STRLEN wcslen

+#endif /* WIDE */

-IMPL (stupid_strcspn, 0)

-IMPL (simple_strcspn, 0)

-IMPL (strcspn, 1)

+typedef size_t (*proto_t) (const CHAR *, const CHAR *);

+size_t SIMPLE_STRCSPN (const CHAR *, const CHAR *);

+size_t STUPID_STRCSPN (const CHAR *, const CHAR *);

+

+IMPL (STUPID_STRCSPN, 0)

+IMPL (SIMPLE_STRCSPN, 0)

+IMPL (STRCSPN, 1)

 size_t

-simple_strcspn (const char *s, const char *rej)

+SIMPLE_STRCSPN (const CHAR *s, const CHAR *rej)

 {

-  const char *r, *str = s;

-  char c;

+  const CHAR *r, *str = s;

+  CHAR c;

   while ((c = *s++) != '\0')

     for (r = rej; *r != '\0'; ++r)

@@ -45,9 +64,9 @@ simple_strcspn (const char *s, const char *rej)

 }

 size_t

-stupid_strcspn (const char *s, const char *rej)

+STUPID_STRCSPN (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)

@@ -57,4 +76,6 @@ stupid_strcspn (const char *s, const char *rej)

   return i;

 }

+#undef CHAR

+#undef STRLEN

 #include "test-strpbrk.c"

diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile

index 5765a8c..2c1fce0 100644

--- a/sysdeps/s390/multiarch/Makefile

+++ b/sysdeps/s390/multiarch/Makefile

@@ -13,7 +13,8 @@ sysdep_routines += strlen strlen-vx strlen-c \

 		   strchrnul strchrnul-vx strchrnul-c \

 		   strrchr strrchr-vx strrchr-c \

 		   strspn strspn-vx strspn-c \

-		   strpbrk strpbrk-vx strpbrk-c

+		   strpbrk strpbrk-vx strpbrk-c \

+		   strcspn strcspn-vx strcspn-c

 endif

 ifeq ($(subdir),wcsmbs)

@@ -31,5 +32,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \

 		   wcschrnul wcschrnul-vx wcschrnul-c \

 		   wcsrchr wcsrchr-vx wcsrchr-c \

 		   wcsspn wcsspn-vx wcsspn-c \

-		   wcspbrk wcspbrk-vx wcspbrk-c

+		   wcspbrk wcspbrk-vx wcspbrk-c \

+		   wcscspn wcscspn-vx wcscspn-c

 endif

diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c

index b39a5c5..7f62e49 100644

--- a/sysdeps/s390/multiarch/ifunc-impl-list.c

+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c

@@ -124,6 +124,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,

   IFUNC_VX_IMPL (strpbrk);

   IFUNC_VX_IMPL (wcspbrk);

+  IFUNC_VX_IMPL (strcspn);

+  IFUNC_VX_IMPL (wcscspn);

+

 #endif /* HAVE_S390_VX_ASM_SUPPORT */

   return i;

diff --git a/sysdeps/s390/multiarch/strcspn-c.c b/sysdeps/s390/multiarch/strcspn-c.c

new file mode 100644

index 0000000..af04b4e

--- /dev/null

+++ b/sysdeps/s390/multiarch/strcspn-c.c

@@ -0,0 +1,28 @@

+/* Default strcspn 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 && !defined NOT_IN_libc

+# define STRCSPN  __strcspn_c

+# ifdef SHARED

+#  undef libc_hidden_builtin_def

+#  define libc_hidden_builtin_def(name)				\

+     __hidden_ver1 (__strcspn_c, __GI_strcspn, __strcspn_c);

+# endif /* SHARED */

+

+# include <string/strcspn.c>

+#endif /* HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc */

diff --git a/sysdeps/s390/multiarch/strcspn-vx.S b/sysdeps/s390/multiarch/strcspn-vx.S

new file mode 100644

index 0000000..c7113c4

--- /dev/null

+++ b/sysdeps/s390/multiarch/strcspn-vx.S

@@ -0,0 +1,281 @@

+/* Vector optimized 32/64 bit S/390 version of strcspn.

+   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 && !defined NOT_IN_libc

+

+# include "sysdep.h"

+# include "asm-syntax.h"

+

+	.text

+

+/* size_t strcspn (const char *s, const char * reject)

+   The strcspn() function calculates the length of the initial segment

+   of s which consists entirely of characters not in reject.

+

+   This method checks the length of reject 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 reject-string

+   r2:  pointer to start of search-string

+   r0:  loaded byte count of vlbb search-string

+   r4:  found byte index

+   r1:  current return len

+   v16: search-string

+   v17: reject-string

+   v18: temp-vreg

+

+   ONLY FOR SLOW:

+   v19: first reject-string

+   v20: zero for preparing acc-vector

+   v21: global mask; 1 indicates a match between

+	search-string-vreg and any reject-character

+   v22: current mask; 1 indicates a match between

+	search-string-vreg and any reject-character in current acc-vreg

+   v24: one for result-checking of former string-part

+   v30, v31: for re-/storing registers r6, r8, r9

+   r5:  current len of reject-string

+   r6:  zero-index in search-string or 16 if no zero

+	or min(zero-index, loaded byte count)

+   r8:  >0, if former reject-string-part contains a zero,

+			otherwise =0;

+   r9:  loaded byte count of vlbb reject-string

+*/

+ENTRY(__strcspn_vx)

+	.machine "z13"

+	.machinemode "zarch_nohighgprs"

+

+	/*

+	  Check if reject-string fits in one vreg:

+	  ----------------------------------------

+	*/

+	vlbb	%v17,0(%r3),6	/* Load reject.  */

+	lghi	%r1,0		/* Zero out current len.  */

+	lcbb	%r0,0(%r3),6

+	jo	.Lcheck_onbb	/* Special case if reject

+				   lays on block-boundary.  */

+.Lcheck_notonbb:

+	vistrbs	%v17,%v17	/* Fill with zeros after first zero.  */

+	je	.Lfast		/* Zero found -> reject fits in one vreg.  */

+	j	.Lslow		/* No zero -> reject exceeds one vreg.  */

+

+

+.Lcheck_onbb:

+	/* Reject lays on block-boundary.  */

+	vfenezb	%v18,%v17,%v17	/* Search zero in loaded reject bytes.  */

+	vlgvb	%r4,%v18,7	/* Get index of zero or 16 if not found.  */

+	clrjl	%r4,%r0,.Lcheck_notonbb /* Zero index < loaded bytes count ->

+					    Reject fits in one vreg;

+					    Fill with zeros and proceed

+					    with FAST.  */

+	vl	%v17,0(%r3)	/* Load reject, which exceeds loaded bytes.  */

+	j	.Lcheck_notonbb /* Check if reject fits in one vreg.  */

+

+

+	/*

+	  Search s for reject in one vreg

+	  -------------------------------

+	*/

+.Lfast:

+	/* Complete reject-string in v17 and remaining bytes are zero.  */

+

+	vlbb	%v16,0(%r2),6	/* Load s until next 4k-byte boundary.  */

+	lcbb	%r0,0(%r2),6	/* Get bytes to 4k-byte boundary or 16.  */

+

+	vfaezbs	%v18,%v16,%v17,0 /* Find first element in v16

+				    unequal to any in v17

+				    or first zero element.  */

+

+	vlgvb	%r4,%v18,7	/* Load byte index of found element.  */

+	clrjl	%r4,%r0,.Lfast_loop_found2 /* If found index is within loaded

+					       bytes, return with found element

+					       index (=equal count).  */

+

+	/* Align s to 16 byte.  */

+	risbgn	%r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15.  */

+	lghi	%r1,16		/* current_len = 16.  */

+	slr	%r1,%r4		/* Compute bytes to 16bytes boundary.  */

+

+	/* Process s in 16byte aligned loop.  */

+.Lfast_loop:

+	vl	%v16,0(%r1,%r2)	/* Load search-string.  */

+	vfaezbs	%v18,%v16,%v17,0 /* Find first element in v16 equal to any

+				    in v17 or first zero element.  */

+	jno	.Lfast_loop_found

+

+	vl	%v16,16(%r1,%r2)

+	vfaezbs	%v18,%v16,%v17,0

+	jno	.Lfast_loop_found16

+

+	vl	%v16,32(%r1,%r2)

+	vfaezbs	%v18,%v16,%v17,0

+	jno	.Lfast_loop_found32

+

+	vl	%v16,48(%r1,%r2)

+	vfaezbs	%v18,%v16,%v17,0

+	jno	.Lfast_loop_found48

+

+	aghi	%r1,64

+	j	.Lfast_loop	/* Loop if no element was unequal to reject

+				   and not zero.  */

+

+	/* Found equal or zero element.  */

+.Lfast_loop_found48:

+	aghi	%r1,16

+.Lfast_loop_found32:

+	aghi	%r1,16

+.Lfast_loop_found16:

+	aghi	%r1,16

+.Lfast_loop_found:

+	vlgvb	%r4,%v18,7	/* Load byte index of found element or zero.  */

+.Lfast_loop_found2:

+	algrk	%r2,%r1,%r4	/* Add found index to current len.  */

+	br	%r14

+

+

+

+	/*

+	  Search s for reject in multiple vregs

+	  -------------------------------------

+	*/

+.Lslow:

+	/* Save registers.  */

+	vlvgg	%v30,%r6,0

+	vlvgp	%v31,%r8,%r9

+

+	/* Reject in v17 without zero.  */

+	vlr	%v19,%v17	/* Save first acc-part for a fast reload.  */

+	vzero	%v20		/* Zero for preparing acc-vector.  */

+	vone	%v24		/* One for checking result of former

+				   string-part.  */

+

+	/* Align s to 16 byte.  */

+	risbg	%r4,%r2,60,128+63,0 /* Test if s is aligned and

+				       %r4 = bits 60-63 'and' 15.   */

+	je	.Lslow_loop_str /* If s is aligned, loop aligned.  */

+	lghi	%r0,15

+	slr	%r0,%r4		/* Compute highest index to load (15-x).  */

+	vll	%v16,%r0,0(%r2) /* Load up to 16 byte boundary (vll needs

+				   highest index, remaining bytes are 0).  */

+	ahi	%r0,1		/* Work with loaded byte count.  */

+	vzero	%v21		/* Zero out global mask.  */

+	lghi	%r5,0		/* Set current len of reject-string to zero.  */

+	vfenezb	%v18,%v16,%v16	/* Find zero in current string-part.  */

+	lghi	%r8,0		/* There is no zero in first reject-part.  */

+	vlgvb	%r6,%v18,7	/* Load byte index of zero or 16 if no zero.  */

+	clije	%r6,0,.Lslow_end /* If first element is zero -> return 0.  */

+	clr	%r0,%r6		/* cc==1 if loaded byte count < zero-index.  */

+	locrl	%r6,%r0		/* Load on cc==1; zero-index = lbc.  */

+	j	.Lslow_loop_acc

+

+

+	/* Process s in 16byte aligned loop.  */

+.Lslow_next_str:

+	/* Check results of former processed str-part.  */

+	vfeeb	%v18,%v21,%v24	/* Find first equal match in global mask

+				   (ones in element).  */

+	vlgvb	%r4,%v18,7	/* Get index of first one (=equal) or 16.  */

+	/* Equal-index < min(zero-index, loaded byte count)

+	   -> Return pointer to equal element.  */

+	clrjl	%r4,%r6,.Lslow_index_found

+	/* Zero-index < loaded byte count

+	   -> Former str-part was last str-part

+	   -> Return null */

+	clrjl	%r6,%r0,.Lslow_end_not_found

+

+	/* All elements are zero (=no match) -> Proceed with next str-part.  */

+	vlr	%v17,%v19	/* Load first part of reject (no zero).  */

+	algfr	%r1,%r0		/* Add loaded byte count to current len.  */

+

+.Lslow_loop_str:

+	vl	%v16,0(%r1,%r2)	/* Load search-string.  */

+	lghi	%r0,16		/* Loaded byte count is 16.  */

+	vzero	%v21		/* Zero out global mask.  */

+	lghi	%r5,0		/* Set current len of reject to zero.  */

+	vfenezb	%v18,%v16,%v16	/* Find zero in current string-part.  */

+	lghi	%r8,0		/* There is no zero in first reject-part.  */

+	vlgvb	%r6,%v18,7	/* Load byte index of zero or 16 if no zero.  */

+	clije	%r6,0,.Lslow_end /* If first element is zero (end of string)

+				     -> Return current length.  */

+

+.Lslow_loop_acc:

+	vfaeb	%v22,%v16,%v17,4 /* Create matching-mask (1 in mask ->

+				    Character matches any rejected character in

+				    this reject-string-part) IN=0, RT=1.  */

+	vlgvb	%r4,%v22,0	/* Get result of first element.  */

+	/* First element is equal to any rejected characters?

+	   (all other parts of reject cannot lead to a match before this one)

+	   -> Return current len, which is pointing to this element.  */

+	clijh	%r4,0,.Lslow_end

+	vo	%v21,%v21,%v22	/* Global-mask = global-|matching-mask.  */

+	/* Proceed with next acc until end of acc is reached.  */

+

+

+.Lslow_next_acc:

+	clijh	%r8,0,.Lslow_next_str /* There was a zero in last reject-part

+					  -> Add found index to current len

+					     and end.  */

+	vlbb	%v17,16(%r5,%r3),6 /* Load next reject part.  */

+	aghi	%r5,16		/* Increment current len of reject-string.  */

+	lcbb	%r9,0(%r5,%r3),6 /* Get loaded byte count of reject-string.  */

+	jo	.Lslow_next_acc_onbb /* Jump away if reject-string is

+					 on block-boundary.  */

+.Lslow_next_acc_notonbb:

+	vistrbs	%v17,%v17	/* Fill with zeros after first zero.  */

+	jo	.Lslow_loop_acc /* No zero found -> no preparation needed.  */

+

+.Lslow_next_acc_prepare_zero:

+	/* Zero in reject-part: fill zeros with first-reject-character.  */

+	vlgvb	%r8,%v17,0	/* Load first element of reject-part.  */

+	clije	%r8,0,.Lslow_next_str /* Process next str-part if first

+					  character in this part of reject

+					  is a zero.  */

+	/* r8>0 -> zero found in this acc-part.  */

+	vrepb	%v18,%v17,0	/* Replicate first char accross all chars.  */

+	vceqb	%v22,%v20,%v17	/* Create a mask (v22) of null chars

+				   by comparing with 0 (v20).  */

+	vsel	%v17,%v18,%v17,%v22 /* Replace null chars with first char.  */

+	j	.Lslow_loop_acc /* Reject-string part is prepared.  */

+

+.Lslow_next_acc_onbb:

+	vfenezb	%v18,%v17,%v17	/* Find zero in loaded bytes of reject part.  */

+	vlgvb	%r8,%v18,7	/* Load byte index of zero.  */

+	clrjl	%r8,%r9,.Lslow_next_acc_notonbb /* Found a zero in loaded bytes

+						    -> Prepare vreg.  */

+	vl	%v17,0(%r5,%r3)	/* Load over boundary ...  */

+	lghi	%r8,0		/* r8=0 -> no zero in this part of acc,

+				   check for zero is in jump-target.  */

+	j	.Lslow_next_acc_notonbb /* ... and search for zero in

+					    fully loaded vreg again.  */

+

+.Lslow_end_not_found:

+	algfr	%r1,%r6		/* Add zero-index to current len.  */

+	j	.Lslow_end

+.Lslow_index_found:

+	algfr	%r1,%r4		/* Add found index of char to current len.  */

+.Lslow_end:

+	lgr	%r2,%r1

+	/* Restore registers.  */

+	vlgvg	%r6,%v30,0

+	vlgvg	%r8,%v31,0

+	vlgvg	%r9,%v31,1

+	br	%r14

+END(__strcspn_vx)

+#endif /* HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc */

diff --git a/sysdeps/s390/multiarch/strcspn.c b/sysdeps/s390/multiarch/strcspn.c

new file mode 100644

index 0000000..32b46c4

--- /dev/null

+++ b/sysdeps/s390/multiarch/strcspn.c

@@ -0,0 +1,27 @@

+/* Multiple versions of strcspn.

+   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 && !defined NOT_IN_libc

+# include <string.h>

+# include <ifunc-resolve.h>

+

+s390_vx_libc_ifunc2 (__strcspn, strcspn)

+

+#else

+# include <string/strcspn.c>

+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc) */

diff --git a/sysdeps/s390/multiarch/wcscspn-c.c b/sysdeps/s390/multiarch/wcscspn-c.c

new file mode 100644

index 0000000..95e76ae

--- /dev/null

+++ b/sysdeps/s390/multiarch/wcscspn-c.c

@@ -0,0 +1,26 @@

+/* Default wcscscpn 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 && !defined NOT_IN_libc

+# define WCSCSPN  __wcscspn_c

+

+# include <wchar.h>

+extern __typeof (wcscspn) __wcscspn_c;

+

+# include <wcsmbs/wcscspn.c>

+#endif

diff --git a/sysdeps/s390/multiarch/wcscspn-vx.S b/sysdeps/s390/multiarch/wcscspn-vx.S

new file mode 100644

index 0000000..aa581ce

--- /dev/null

+++ b/sysdeps/s390/multiarch/wcscspn-vx.S

@@ -0,0 +1,293 @@

+/* Vector optimized 32/64 bit S/390 version of wcscspn.

+   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 && !defined NOT_IN_libc

+

+# include "sysdep.h"

+# include "asm-syntax.h"