From 6bad9c03df10e4bca1840eff95ef9036e5261436 Mon Sep 17 00:00:00 2001

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

Date: Thu, 8 Oct 2015 13:20:09 +0200

Subject: [PATCH 26/30] S390: Optimize memchr, rawmemchr and wmemchr.

upstream-commit-id: 88eefd344b3cf4a41284a1dfdaca61667e3a1b4b

https://www.sourceware.org/ml/libc-alpha/2015-07/msg00093.html

This patch provides optimized versions of memchr, rawmemchr and wmemchr with the

z13 vector instructions.

ChangeLog:

	* sysdeps/s390/multiarch/memchr-vx.S: New File.

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

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

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

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

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

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

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

	* sysdeps/s390/s390-32/multiarch/memchr.c: Likewise.

	* sysdeps/s390/s390-64/multiarch/memchr.c: Likewise.

	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memchr, wmemchr

	and rawmemchr functions.

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

	(__libc_ifunc_impl_list_common): Add ifunc test for memchr, rawmemchr

	and wmemchr.

	* wcsmbs/wmemchr.c: Use WMEMCHR if defined.

	* string/test-memchr.c: Add wmemchr support.

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

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

	* benchtests/bench-memchr.c: Add wmemchr support.

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

	* benchtests/Makefile (wcsmbs-bench): wmemchr.

---

 benchtests/Makefile                      |   3 +-

 benchtests/bench-memchr.c                |  68 ++++++++-----

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

 string/test-memchr.c                     |  89 +++++++++++------

 sysdeps/s390/multiarch/Makefile          |   7 +-

 sysdeps/s390/multiarch/ifunc-impl-list.c |   4 +

 sysdeps/s390/multiarch/memchr-vx.S       | 159 +++++++++++++++++++++++++++++

 sysdeps/s390/multiarch/memchr.c          |  24 +++++

 sysdeps/s390/multiarch/rawmemchr-c.c     |  34 +++++++

 sysdeps/s390/multiarch/rawmemchr-vx.S    |  92 +++++++++++++++++

 sysdeps/s390/multiarch/rawmemchr.c       |  28 ++++++

 sysdeps/s390/multiarch/wmemchr-c.c       |  31 ++++++

 sysdeps/s390/multiarch/wmemchr-vx.S      | 166 +++++++++++++++++++++++++++++++

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

 sysdeps/s390/s390-32/multiarch/memchr.c  |  21 ++++

 sysdeps/s390/s390-64/multiarch/memchr.c  |  21 ++++

 wcsmbs/Makefile                          |   2 +-

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

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

 wcsmbs/wmemchr.c                         |   4 +

 20 files changed, 780 insertions(+), 60 deletions(-)

 create mode 100644 benchtests/bench-wmemchr.c

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

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

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

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

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

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

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

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

 create mode 100644 sysdeps/s390/s390-32/multiarch/memchr.c

 create mode 100644 sysdeps/s390/s390-64/multiarch/memchr.c

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

 create mode 100644 wcsmbs/test-wmemchr.c

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

index 4e811a9..b4b3127 100644

--- a/benchtests/Makefile

+++ b/benchtests/Makefile

@@ -39,7 +39,8 @@ 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 wcscspn

+		wcsncmp wcsncmp wcschr wcschrnul wcsrchr wcsspn wcspbrk wcscspn \

+		wmemchr

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

 stdlib-bench := strtod

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

index 30c472c..84a90b4 100644

--- a/benchtests/bench-memchr.c

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

@@ -16,31 +16,51 @@

    License along with the GNU C Library; if not, see

    <http://www.gnu.org/licenses/>.  */

+#ifndef WIDE

+# define CHAR char

+# define SMALL_CHAR 127

+#else

+# include <wchar.h>

+# define CHAR wchar_t

+# define SMALL_CHAR 1273

+#endif /* WIDE */

 #ifndef USE_AS_MEMRCHR

 # define TEST_MAIN

-# define TEST_NAME "memchr"

+# ifndef WIDE

+#  define TEST_NAME "memchr"

+# else

+#  define TEST_NAME "wmemchr"

+# endif /* WIDE */

 # include "bench-string.h"

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

-char *simple_memchr (const char *, int, size_t);

+# ifndef WIDE

+#  define MEMCHR memchr

+#  define SIMPLE_MEMCHR simple_memchr

+# else

+#  define MEMCHR wmemchr

+#  define SIMPLE_MEMCHR simple_wmemchr

+# endif /* WIDE */

-IMPL (simple_memchr, 0)

-IMPL (memchr, 1)

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

+CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t);

-char *

-simple_memchr (const char *s, int c, size_t n)

+IMPL (SIMPLE_MEMCHR, 0)

+IMPL (MEMCHR, 1)

+

+CHAR *

+SIMPLE_MEMCHR (const CHAR *s, int c, size_t n)

 {

   while (n--)

-    if (*s++ == (char) c)

-      return (char *) s - 1;

+    if (*s++ == (CHAR) c)

+      return (CHAR *) s - 1;

   return NULL;

 }

-#endif

+#endif /* !USE_AS_MEMRCHR */

 static void

-do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res)

+do_one_test (impl_t *impl, const CHAR *s, int c, size_t n, CHAR *exp_res)

 {

-  char *res = CALL (impl, s, c, n);

+  CHAR *res = CALL (impl, s, c, n);

   size_t i, iters = INNER_LOOP_ITERS;

   timing_t start, stop, cur;

@@ -68,36 +88,38 @@ static void

 do_test (size_t align, size_t pos, size_t len, int seek_char)

 {

   size_t i;

-  char *result;

+  CHAR *result;

   align &= 7;

-  if (align + len >= page_size)

+  if ((align + len) * sizeof (CHAR) >= page_size)

     return;

+  CHAR *buf = (CHAR *) (buf1);

+

   for (i = 0; i < len; ++i)

     {

-      buf1[align + i] = 1 + 23 * i % 127;

-      if (buf1[align + i] == seek_char)

-        buf1[align + i] = seek_char + 1;

+      buf[align + i] = 1 + 23 * i % SMALL_CHAR;

+      if (buf[align + i] == seek_char)

+        buf[align + i] = seek_char + 1;

     }

-  buf1[align + len] = 0;

+  buf[align + len] = 0;

   if (pos < len)

     {

-      buf1[align + pos] = seek_char;

-      buf1[align + len] = -seek_char;

-      result = (char *) (buf1 + align + pos);

+      buf[align + pos] = seek_char;

+      buf[align + len] = -seek_char;

+      result = (CHAR *) (buf1 + align + pos);

     }

   else

     {

       result = NULL;

-      buf1[align + len] = seek_char;

+      buf[align + len] = seek_char;

     }

   printf ("Length %4zd, alignment %2zd:", pos, align);

   FOR_EACH_IMPL (impl, 0)

-    do_one_test (impl, (char *) (buf1 + align), seek_char, len, result);

+    do_one_test (impl, (CHAR *) (buf + align), seek_char, len, result);

   putchar ('\n');

 }

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

new file mode 100644

index 0000000..d796a69

--- /dev/null

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

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

+/* Measure wmemchr 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-memchr.c"

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

index cdcceeb..058a837 100644

--- a/string/test-memchr.c

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

@@ -18,28 +18,49 @@

    <http://www.gnu.org/licenses/>.  */

 #define TEST_MAIN

-#define TEST_NAME "memchr"

+#ifndef WIDE

+# define TEST_NAME "memchr"

+#else

+# define TEST_NAME "wmemchr"

+#endif /* WIDE */

 #include "test-string.h"

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

-char *simple_memchr (const char *, int, size_t);

-

-IMPL (simple_memchr, 0)

-IMPL (memchr, 1)

-

-char *

-simple_memchr (const char *s, int c, size_t n)

+#ifndef WIDE

+# define MEMCHR memchr

+# define CHAR char

+# define UCHAR unsigned char

+# define SIMPLE_MEMCHR simple_memchr

+# define BIG_CHAR CHAR_MAX

+# define SMALL_CHAR 127

+#else

+# include <wchar.h>

+# define MEMCHR wmemchr

+# define CHAR wchar_t

+# define UCHAR wchar_t

+# define SIMPLE_MEMCHR simple_wmemchr

+# define BIG_CHAR WCHAR_MAX

+# define SMALL_CHAR 1273

+#endif /* WIDE */

+

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

+CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t);

+

+IMPL (SIMPLE_MEMCHR, 0)

+IMPL (MEMCHR, 1)

+

+CHAR *

+SIMPLE_MEMCHR (const CHAR *s, int c, size_t n)

 {

   while (n--)

-    if (*s++ == (char) c)

-      return (char *) s - 1;

+    if (*s++ == (CHAR) c)

+      return (CHAR *) s - 1;

   return NULL;

 }

 static void

-do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res)

+do_one_test (impl_t *impl, const CHAR *s, int c, size_t n, CHAR *exp_res)

 {

-  char *res = CALL (impl, s, c, n);

+  CHAR *res = CALL (impl, s, c, n);

   if (res != exp_res)

     {

       error (0, 0, "Wrong result in function %s %p %p", impl->name,

@@ -53,34 +74,36 @@ static void

 do_test (size_t align, size_t pos, size_t len, int seek_char)

 {

   size_t i;

-  char *result;

+  CHAR *result;

   align &= 7;

-  if (align + len >= page_size)

+  if ((align + len) * sizeof (CHAR) >= page_size)

     return;

+  CHAR *buf = (CHAR *) (buf1);

+

   for (i = 0; i < len; ++i)

     {

-      buf1[align + i] = 1 + 23 * i % 127;

-      if (buf1[align + i] == seek_char)

-        buf1[align + i] = seek_char + 1;

+      buf[align + i] = 1 + 23 * i % SMALL_CHAR;

+      if (buf[align + i] == seek_char)

+	buf[align + i] = seek_char + 1;

     }

-  buf1[align + len] = 0;

+  buf[align + len] = 0;

   if (pos < len)

     {

-      buf1[align + pos] = seek_char;

-      buf1[align + len] = -seek_char;

-      result = (char *) (buf1 + align + pos);

+      buf[align + pos] = seek_char;

+      buf[align + len] = -seek_char;

+      result = (CHAR *) (buf + align + pos);

     }

   else

     {

       result = NULL;

-      buf1[align + len] = seek_char;

+      buf[align + len] = seek_char;

     }

   FOR_EACH_IMPL (impl, 0)

-    do_one_test (impl, (char *) (buf1 + align), seek_char, len, result);

+    do_one_test (impl, (CHAR *) (buf + align), seek_char, len, result);

 }

 static void

@@ -88,8 +111,8 @@ do_random_tests (void)

 {

   size_t i, j, n, align, pos, len;

   int seek_char;

-  char *result;

-  unsigned char *p = buf1 + page_size - 512;

+  CHAR *result;

+  UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;

   for (n = 0; n < ITERATIONS; n++)

     {

@@ -101,11 +124,11 @@ do_random_tests (void)

       if (pos >= len)

 	len = pos + (random () & 7);

       if (len + align >= 512)

-        len = 512 - align - (random () & 7);

-      seek_char = random () & 255;

+	len = 512 - align - (random () & 7);

+      seek_char = random () & BIG_CHAR;

       j = len + align + 64;

       if (j > 512)

-        j = 512;

+	j = 512;

       for (i = 0; i < j; i++)

 	{

@@ -113,7 +136,7 @@ do_random_tests (void)

 	    p[i] = seek_char;

 	  else

 	    {

-	      p[i] = random () & 255;

+	      p[i] = random () & BIG_CHAR;

 	      if (i < pos + align && p[i] == seek_char)

 		p[i] = seek_char + 13;

 	    }

@@ -124,17 +147,17 @@ do_random_tests (void)

 	  size_t r = random ();

 	  if ((r & 31) == 0)

 	    len = ~(uintptr_t) (p + align) - ((r >> 5) & 31);

-	  result = (char *) (p + pos + align);

+	  result = (CHAR *) (p + pos + align);

 	}

       else

 	result = NULL;

       FOR_EACH_IMPL (impl, 1)

-	if (CALL (impl, (char *) (p + align), seek_char, len) != result)

+	if (CALL (impl, (CHAR *) (p + align), seek_char, len) != result)

 	  {

 	    error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",

 		   n, impl->name, align, seek_char, len, pos,

-		   CALL (impl, (char *) (p + align), seek_char, len),

+		   CALL (impl, (CHAR *) (p + align), seek_char, len),

 		   result, p);

 	    ret = 1;

 	  }

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

index 2c1fce0..4a04c34 100644

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

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

@@ -14,7 +14,9 @@ sysdep_routines += strlen strlen-vx strlen-c \

 		   strrchr strrchr-vx strrchr-c \

 		   strspn strspn-vx strspn-c \

 		   strpbrk strpbrk-vx strpbrk-c \

-		   strcspn strcspn-vx strcspn-c

+		   strcspn strcspn-vx strcspn-c \

+		   memchr memchr-vx \

+		   rawmemchr rawmemchr-vx rawmemchr-c

 endif

 ifeq ($(subdir),wcsmbs)

@@ -33,5 +35,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \

 		   wcsrchr wcsrchr-vx wcsrchr-c \

 		   wcsspn wcsspn-vx wcsspn-c \

 		   wcspbrk wcspbrk-vx wcspbrk-c \

-		   wcscspn wcscspn-vx wcscspn-c

+		   wcscspn wcscspn-vx wcscspn-c \

+		   wmemchr wmemchr-vx wmemchr-c

 endif

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

index 7f62e49..d4c7c0d 100644

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

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

@@ -127,6 +127,10 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,

   IFUNC_VX_IMPL (strcspn);

   IFUNC_VX_IMPL (wcscspn);

+  IFUNC_VX_IMPL (memchr);

+  IFUNC_VX_IMPL (wmemchr);

+  IFUNC_VX_IMPL (rawmemchr);

+

 #endif /* HAVE_S390_VX_ASM_SUPPORT */

   return i;

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

new file mode 100644

index 0000000..5c98fd9

--- /dev/null

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

@@ -0,0 +1,159 @@

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

+   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

+

+/* void *memchr (const void *s, int c, size_t n)

+   Scans memory for character c

+   and returns pointer to first c.

+

+   Register usage:

+   -r0=tmp

+   -r1=tmp

+   -r2=s

+   -r3=c

+   -r4=n

+   -r5=current_len

+   -v16=part of s

+   -v17=index of found c

+   -v18=c replicated

+*/

+ENTRY(__memchr_vx)

+

+	.machine "z13"

+	.machinemode "zarch_nohighgprs"

+

+# if !defined __s390x__

+	llgfr	%r4,%r4

+# endif /* !defined __s390x__ */

+

+	clgije	%r4,0,.Lnf_end	/* If len == 0 then exit.  */

+

+	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.  */

+	llgfr	%r0,%r0		/* Convert 32bit to 64bit.  */

+

+	vlvgb	%v18,%r3,0	/* Generate vector which elements are all c.

+				   if c > 255, c will be truncated.  */

+	vrepb	%v18,%v18,0

+	lghi	%r5,16		/* current_len = 16.  */

+

+	clgrjhe	%r0,%r4,.Llastcmp /* If (bytes to boundary) >= n,

+				     jump to lastcmp.  */

+

+	vfeebs	%v17,%v16,%v18	/* Find c.  */

+	vlgvb	%r1,%v17,7	/* Load byte index of c.  */

+	clgrjl	%r1,%r0,.Lfound2 /* Found c is within loaded bytes.  */

+

+	/* Align s to 16 byte.  */

+	risbgn	%r1,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15.  */

+	slr	%r5,%r1		/* Compute bytes to 16bytes boundary.  */

+

+	lgr	%r0,%r5		/* If %r5 + 64 < n? -> loop64.  */

+	aghi	%r0,64

+	clgrjl	%r0,%r4,.Lloop64

+.Llt64:

+	vl	%v16,0(%r5,%r2)

+	aghi	%r5,16

+	clgrjhe	%r5,%r4,.Llastcmp /* Do last compare if curr-len >= n.  */

+	vfeebs	%v17,%v16,%v18	/* Find c.  */

+	jl	.Lfound	/* Jump away if c was found.  */

+

+	vl	%v16,0(%r5,%r2)

+	aghi	%r5,16

+	clgrjhe	%r5,%r4,.Llastcmp

+	vfeebs	%v17,%v16,%v18

+	jl	.Lfound

+

+	vl	%v16,0(%r5,%r2)

+	aghi	%r5,16

+	clgrjhe	%r5,%r4,.Llastcmp

+	vfeebs	%v17,%v16,%v18

+	jl	.Lfound

+

+	vl	%v16,0(%r5,%r2)

+	aghi	%r5,16

+

+.Llastcmp:

+	/* Use comparision result only if located within first n characters.

+	   %r5: current_len;

+	   %r4: n;

+	   (current_len - n): [0...16[

+	   first ignored match index: vr-width - (current_len - n) ]0...16]

+	*/

+	vfeebs	%v17,%v16,%v18	/* Find c.  */

+	slgrk	%r4,%r5,%r4	/* %r5 = current_len - n.  */

+	lghi	%r0,16		/* Register width = 16.  */

+	vlgvb	%r1,%v17,7	/* Extract found index or 16 if all equal.  */

+	slr	%r0,%r4		/* %r0 = first ignored match index.  */

+	clrjl	%r1,%r0,.Lfound2 /* Go away if miscompare is below n bytes.  */

+	/* c not found within n-bytes.  */

+.Lnf_end:

+	lghi	%r2,0		/* Return null.  */

+	br	%r14

+

+.Lfound48:

+	aghi	%r5,16

+.Lfound32:

+	aghi	%r5,16

+.Lfound16:

+	aghi	%r5,16

+.Lfound0:

+	aghi	%r5,16

+.Lfound:

+	vlgvb	%r1,%v17,7	/* Load byte index of c.  */

+.Lfound2:

+	slgfi	%r5,16		/* current_len -=16 */

+	algr	%r5,%r1		/* Zero byte index is added to current len.  */

+	la	%r2,0(%r5,%r2)	/* Return pointer to c.  */

+	br	%r14

+

+

+.Lloop64:

+	vl	%v16,0(%r5,%r2)

+	vfeebs	%v17,%v16,%v18	/* Find c.  */

+	jl	.Lfound0	/* Jump away if c was found.  */

+	vl	%v16,16(%r5,%r2)

+	vfeebs	%v17,%v16,%v18

+	jl	.Lfound16

+	vl	%v16,32(%r5,%r2)

+	vfeebs	%v17,%v16,%v18

+	jl	.Lfound32

+	vl	%v16,48(%r5,%r2)

+	vfeebs	%v17,%v16,%v18

+	jl	.Lfound48

+

+	aghi	%r5,64

+	lgr	%r0,%r5		/* If %r5 + 64 < n? -> loop64.  */

+	aghi	%r0,64

+	clgrjl	%r0,%r4,.Lloop64

+

+	j	.Llt64

+END(__memchr_vx)

+

+# define memchr __memchr_c

+# undef libc_hidden_builtin_def

+# define libc_hidden_builtin_def(name) strong_alias(__memchr_c, __GI_memchr)

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

+

+#include <memchr.S>

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

new file mode 100644

index 0000000..6624765

--- /dev/null

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

@@ -0,0 +1,24 @@

+/* Multiple versions of memchr.

+   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 (__memchr, memchr)

+#endif

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

new file mode 100644

index 0000000..f652133

--- /dev/null

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

@@ -0,0 +1,34 @@

+/* Default rawmemchr 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

+# include <string.h>

+

+# define RAWMEMCHR  __rawmemchr_c

+# undef weak_alias

+# define weak_alias(a, b)

+# ifdef SHARED

+#  undef libc_hidden_def

+#  define libc_hidden_def(name)				\

+     __hidden_ver1 (__rawmemchr_c, __GI___rawmemchr, __rawmemchr_c);

+# endif /* SHARED */

+

+extern __typeof (rawmemchr) __rawmemchr_c attribute_hidden;

+

+# include <string/rawmemchr.c>

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

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

new file mode 100644

index 0000000..2af4570

--- /dev/null

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

@@ -0,0 +1,92 @@

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

+   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

+

+/* void *rawmemchr (const void *s, int c)

+   Scans memory for character c

+   and returns pointer to first c.

+

+   Register usage:

+   -r1=tmp

+   -r2=s

+   -r3=c

+   -r4=tmp

+   -r5=current_len

+   -v16=part of s

+   -v17=index of unequal

+   -v18=c replicated

+*/

+ENTRY(__rawmemchr_vx)