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[PATCH 08/27] S390: Optimize strnlen and wcsnlen.
- From: Stefan Liebler <stli at linux dot vnet dot ibm dot com>
- To: libc-alpha at sourceware dot org
- Cc: Stefan Liebler <stli at linux dot vnet dot ibm dot com>
- Date: Fri, 3 Jul 2015 15:38:22 +0200
- Subject: [PATCH 08/27] S390: Optimize strnlen and wcsnlen.
- Authentication-results: sourceware.org; auth=none
- References: <1435930721-27922-1-git-send-email-stli at linux dot vnet dot ibm dot com>
This patch provides optimized versions of strnlen and wcsnlen with the z13
vector instructions.
ChangeLog:
* sysdeps/s390/multiarch/strnlen-c.c: New File.
* sysdeps/s390/multiarch/strnlen-vx.S: Likewise.
* sysdeps/s390/multiarch/strnlen.c: Likewise.
* sysdeps/s390/multiarch/wcsnlen-c.c: Likewise.
* sysdeps/s390/multiarch/wcsnlen-vx.S: Likewise.
* sysdeps/s390/multiarch/wcsnlen.c: Likewise.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strnlen and
wcsnlen functions.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc test for strnlen, wcsnlen.
* wcsmbs/wcsnlen.c: Use WCSNLEN if defined.
* string/test-strnlen.c: Add wcsnlen support.
* wcsmbs/test-wcsnlen.c: New File.
* wcsmbs/Makefile (strop-tests): Add wcsnlen.
* benchtests/bench-strnlen.c: Add wcsnlen support.
* benchtests/bench-wcsnlen.c: New File.
* benchtests/Makefile (wcsmbs-bench): Add wcsnlen.
---
benchtests/Makefile | 2 +-
benchtests/bench-strnlen.c | 71 ++++++++++-----
benchtests/bench-wcsnlen.c | 20 ++++
string/test-strnlen.c | 87 +++++++++++-------
sysdeps/s390/multiarch/Makefile | 6 +-
sysdeps/s390/multiarch/ifunc-impl-list.c | 3 +
sysdeps/s390/multiarch/strnlen-c.c | 30 ++++++
sysdeps/s390/multiarch/strnlen-vx.S | 134 +++++++++++++++++++++++++++
sysdeps/s390/multiarch/strnlen.c | 29 ++++++
sysdeps/s390/multiarch/wcsnlen-c.c | 25 +++++
sysdeps/s390/multiarch/wcsnlen-vx.S | 151 +++++++++++++++++++++++++++++++
sysdeps/s390/multiarch/wcsnlen.c | 28 ++++++
wcsmbs/Makefile | 2 +-
wcsmbs/test-wcsnlen.c | 20 ++++
wcsmbs/wcsnlen.c | 7 +-
15 files changed, 552 insertions(+), 63 deletions(-)
create mode 100644 benchtests/bench-wcsnlen.c
create mode 100644 sysdeps/s390/multiarch/strnlen-c.c
create mode 100644 sysdeps/s390/multiarch/strnlen-vx.S
create mode 100644 sysdeps/s390/multiarch/strnlen.c
create mode 100644 sysdeps/s390/multiarch/wcsnlen-c.c
create mode 100644 sysdeps/s390/multiarch/wcsnlen-vx.S
create mode 100644 sysdeps/s390/multiarch/wcsnlen.c
create mode 100644 wcsmbs/test-wcsnlen.c
diff --git a/benchtests/Makefile b/benchtests/Makefile
index 5d4afab..295738e 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
+wcsmbs-bench := wcslen wcsnlen
string-bench-all := $(string-bench) ${wcsmbs-bench}
# We have to generate locales
diff --git a/benchtests/bench-strnlen.c b/benchtests/bench-strnlen.c
index 35266e5..cbdce75 100644
--- a/benchtests/bench-strnlen.c
+++ b/benchtests/bench-strnlen.c
@@ -17,17 +17,36 @@
<http://www.gnu.org/licenses/>. */
#define TEST_MAIN
-#define TEST_NAME "strnlen"
+#ifndef WIDE
+# define TEST_NAME "strnlen"
+#else
+# define TEST_NAME "wcsnlen"
+#endif /* WIDE */
#include "bench-string.h"
-typedef size_t (*proto_t) (const char *, size_t);
-size_t simple_strnlen (const char *, size_t);
-
-IMPL (simple_strnlen, 0)
-IMPL (strnlen, 1)
+#ifndef WIDE
+# define STRNLEN strnlen
+# define CHAR char
+# define BIG_CHAR CHAR_MAX
+# define MIDDLE_CHAR 127
+# define SIMPLE_STRNLEN simple_strnlen
+#else
+# include <wchar.h>
+# define STRNLEN wcsnlen
+# define CHAR wchar_t
+# define BIG_CHAR WCHAR_MAX
+# define MIDDLE_CHAR 1121
+# define SIMPLE_STRNLEN simple_wcsnlen
+#endif /* WIDE */
+
+typedef size_t (*proto_t) (const CHAR *, size_t);
+size_t SIMPLE_STRNLEN (const CHAR *, size_t);
+
+IMPL (SIMPLE_STRNLEN, 0)
+IMPL (STRNLEN, 1)
size_t
-simple_strnlen (const char *s, size_t maxlen)
+SIMPLE_STRNLEN (const CHAR *s, size_t maxlen)
{
size_t i;
@@ -36,7 +55,7 @@ simple_strnlen (const char *s, size_t maxlen)
}
static void
-do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len)
+do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
{
size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
@@ -66,18 +85,20 @@ do_test (size_t align, size_t len, size_t maxlen, int max_char)
{
size_t i;
- align &= 7;
- if (align + len >= page_size)
+ align &= 63;
+ if ((align + len) * sizeof (CHAR) >= page_size)
return;
+ CHAR *buf = (CHAR *) (buf1);
+
for (i = 0; i < len; ++i)
- buf1[align + i] = 1 + 7 * i % max_char;
- buf1[align + len] = 0;
+ buf[align + i] = 1 + 7 * i % max_char;
+ buf[align + len] = 0;
printf ("Length %4zd, alignment %2zd:", len, align);
FOR_EACH_IMPL (impl, 0)
- do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen));
+ do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
putchar ('\n');
}
@@ -96,34 +117,34 @@ test_main (void)
for (i = 1; i < 8; ++i)
{
- do_test (0, i, i - 1, 127);
- do_test (0, i, i, 127);
- do_test (0, i, i + 1, 127);
+ do_test (0, i, i - 1, MIDDLE_CHAR);
+ do_test (0, i, i, MIDDLE_CHAR);
+ do_test (0, i, i + 1, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
- do_test (i, i, i - 1, 127);
- do_test (i, i, i, 127);
- do_test (i, i, i + 1, 127);
+ do_test (i, i, i - 1, MIDDLE_CHAR);
+ do_test (i, i, i, MIDDLE_CHAR);
+ do_test (i, i, i + 1, MIDDLE_CHAR);
}
for (i = 2; i <= 10; ++i)
{
- do_test (0, 1 << i, 5000, 127);
- do_test (1, 1 << i, 5000, 127);
+ do_test (0, 1 << i, 5000, MIDDLE_CHAR);
+ do_test (1, 1 << i, 5000, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
- do_test (0, i, 5000, 255);
+ do_test (0, i, 5000, BIG_CHAR);
for (i = 1; i < 8; ++i)
- do_test (i, i, 5000, 255);
+ do_test (i, i, 5000, BIG_CHAR);
for (i = 2; i <= 10; ++i)
{
- do_test (0, 1 << i, 5000, 255);
- do_test (1, 1 << i, 5000, 255);
+ do_test (0, 1 << i, 5000, BIG_CHAR);
+ do_test (1, 1 << i, 5000, BIG_CHAR);
}
return ret;
diff --git a/benchtests/bench-wcsnlen.c b/benchtests/bench-wcsnlen.c
new file mode 100644
index 0000000..2b5a51c
--- /dev/null
+++ b/benchtests/bench-wcsnlen.c
@@ -0,0 +1,20 @@
+/* Measure wcsnlen 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-strnlen.c"
diff --git a/string/test-strnlen.c b/string/test-strnlen.c
index 96797e1..8d35cac 100644
--- a/string/test-strnlen.c
+++ b/string/test-strnlen.c
@@ -1,4 +1,4 @@
-/* Test and measure strlen functions.
+/* Test strlen 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.
@@ -18,17 +18,36 @@
<http://www.gnu.org/licenses/>. */
#define TEST_MAIN
-#define TEST_NAME "strnlen"
+#ifndef WIDE
+# define TEST_NAME "strnlen"
+#else
+# define TEST_NAME "wcsnlen"
+#endif /* !WIDE */
#include "test-string.h"
-typedef size_t (*proto_t) (const char *, size_t);
-size_t simple_strnlen (const char *, size_t);
-
-IMPL (simple_strnlen, 0)
-IMPL (strnlen, 1)
+#ifndef WIDE
+# define STRNLEN strnlen
+# define CHAR char
+# define BIG_CHAR CHAR_MAX
+# define MIDDLE_CHAR 127
+# define SIMPLE_STRNLEN simple_strnlen
+#else
+# include <wchar.h>
+# define STRNLEN wcsnlen
+# define CHAR wchar_t
+# define BIG_CHAR WCHAR_MAX
+# define MIDDLE_CHAR 1121
+# define SIMPLE_STRNLEN simple_wcsnlen
+#endif /* !WIDE */
+
+typedef size_t (*proto_t) (const CHAR *, size_t);
+size_t SIMPLE_STRNLEN (const CHAR *, size_t);
+
+IMPL (SIMPLE_STRNLEN, 0)
+IMPL (STRNLEN, 1)
size_t
-simple_strnlen (const char *s, size_t maxlen)
+SIMPLE_STRNLEN (const CHAR *s, size_t maxlen)
{
size_t i;
@@ -37,7 +56,7 @@ simple_strnlen (const char *s, size_t maxlen)
}
static void
-do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len)
+do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len)
{
size_t len = CALL (impl, s, maxlen);
if (len != exp_len)
@@ -54,23 +73,25 @@ do_test (size_t align, size_t len, size_t maxlen, int max_char)
{
size_t i;
- align &= 7;
- if (align + len >= page_size)
+ align &= 63;
+ if ((align + len) * sizeof (CHAR) >= page_size)
return;
+ CHAR *buf = (CHAR *) (buf1);
+
for (i = 0; i < len; ++i)
- buf1[align + i] = 1 + 7 * i % max_char;
- buf1[align + len] = 0;
+ buf[align + i] = 1 + 11111 * i % max_char;
+ buf[align + len] = 0;
FOR_EACH_IMPL (impl, 0)
- do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen));
+ do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen));
}
static void
do_random_tests (void)
{
size_t i, j, n, align, len;
- unsigned char *p = buf1 + page_size - 512;
+ CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
for (n = 0; n < ITERATIONS; n++)
{
@@ -97,25 +118,25 @@ do_random_tests (void)
FOR_EACH_IMPL (impl, 1)
{
if (len > 0
- && CALL (impl, (char *) (p + align), len - 1) != len - 1)
+ && CALL (impl, (CHAR *) (p + align), len - 1) != len - 1)
{
error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
n, impl->name, align,
- CALL (impl, (char *) (p + align), len - 1), len - 1, p);
+ CALL (impl, (CHAR *) (p + align), len - 1), len - 1, p);
ret = 1;
}
- if (CALL (impl, (char *) (p + align), len) != len)
+ if (CALL (impl, (CHAR *) (p + align), len) != len)
{
error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
n, impl->name, align,
- CALL (impl, (char *) (p + align), len), len, p);
+ CALL (impl, (CHAR *) (p + align), len), len, p);
ret = 1;
}
- if (CALL (impl, (char *) (p + align), len + 1) != len)
+ if (CALL (impl, (CHAR *) (p + align), len + 1) != len)
{
error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
n, impl->name, align,
- CALL (impl, (char *) (p + align), len + 1), len, p);
+ CALL (impl, (CHAR *) (p + align), len + 1), len, p);
ret = 1;
}
}
@@ -136,34 +157,34 @@ test_main (void)
for (i = 1; i < 8; ++i)
{
- do_test (0, i, i - 1, 127);
- do_test (0, i, i, 127);
- do_test (0, i, i + 1, 127);
+ do_test (0, i, i - 1, MIDDLE_CHAR);
+ do_test (0, i, i, MIDDLE_CHAR);
+ do_test (0, i, i + 1, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
{
- do_test (i, i, i - 1, 127);
- do_test (i, i, i, 127);
- do_test (i, i, i + 1, 127);
+ do_test (i, i, i - 1, MIDDLE_CHAR);
+ do_test (i, i, i, MIDDLE_CHAR);
+ do_test (i, i, i + 1, MIDDLE_CHAR);
}
for (i = 2; i <= 10; ++i)
{
- do_test (0, 1 << i, 5000, 127);
- do_test (1, 1 << i, 5000, 127);
+ do_test (0, 1 << i, 5000, MIDDLE_CHAR);
+ do_test (1, 1 << i, 5000, MIDDLE_CHAR);
}
for (i = 1; i < 8; ++i)
- do_test (0, i, 5000, 255);
+ do_test (0, i, 5000, BIG_CHAR);
for (i = 1; i < 8; ++i)
- do_test (i, i, 5000, 255);
+ do_test (i, i, 5000, BIG_CHAR);
for (i = 2; i <= 10; ++i)
{
- do_test (0, 1 << i, 5000, 255);
- do_test (1, 1 << i, 5000, 255);
+ do_test (0, 1 << i, 5000, BIG_CHAR);
+ do_test (1, 1 << i, 5000, BIG_CHAR);
}
do_random_tests ();
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 3a98098..3397f24 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,7 +1,9 @@
ifeq ($(subdir),string)
-sysdep_routines += strlen strlen-vx strlen-c
+sysdep_routines += strlen strlen-vx strlen-c \
+ strnlen strnlen-vx strnlen-c
endif
ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcslen wcslen-vx wcslen-c
+sysdep_routines += wcslen wcslen-vx wcslen-c \
+ wcsnlen wcsnlen-vx wcsnlen-c
endif
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index e9639ef..bc17c59 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -82,6 +82,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_VX_IMPL (strlen);
IFUNC_VX_IMPL (wcslen);
+ IFUNC_VX_IMPL (strnlen);
+ IFUNC_VX_IMPL (wcsnlen);
+
#endif /* HAVE_S390_VX_ASM_SUPPORT */
return i;
diff --git a/sysdeps/s390/multiarch/strnlen-c.c b/sysdeps/s390/multiarch/strnlen-c.c
new file mode 100644
index 0000000..72e82ae
--- /dev/null
+++ b/sysdeps/s390/multiarch/strnlen-c.c
@@ -0,0 +1,30 @@
+/* Default strnlen 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 STRNLEN __strnlen_c
+# ifdef SHARED
+# undef libc_hidden_def
+# define libc_hidden_def(name) \
+ __hidden_ver1 (__strnlen_c, __GI_strnlen, __strnlen_c); \
+ strong_alias (__strnlen_c, __strnlen_c_1); \
+ __hidden_ver1 (__strnlen_c_1, __GI___strnlen, __strnlen_c_1);
+# endif /* SHARED */
+
+# include <string/strnlen.c>
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/strnlen-vx.S b/sysdeps/s390/multiarch/strnlen-vx.S
new file mode 100644
index 0000000..12c49de
--- /dev/null
+++ b/sysdeps/s390/multiarch/strnlen-vx.S
@@ -0,0 +1,134 @@
+/* Vector optimized 32/64 bit S/390 version of strnlen.
+ 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
+
+/* size_t strnlen (const char *s, size_t maxlen)
+ Returns the number of characters in s or at most maxlen.
+
+ Register usage:
+ -r1=tmp
+ -r2=address of string
+ -r3=maxlen (number of characters to be read)
+ -r4=tmp
+ -r5=current_len and return_value
+ -v16=part of s
+*/
+ENTRY(__strnlen_vx)
+ .machine "z13"
+ .machinemode "zarch_nohighgprs"
+
+# if !defined __s390x__
+ llgfr %r3,%r3
+# endif /* !defined __s390x__ */
+
+ clgfi %r3,0 /* if maxlen == 0, return 0. */
+ locgre %r2,%r3
+ ber %r14
+
+ vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */
+ lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */
+ llgfr %r1,%r1 /* Convert 32bit to 64bit. */
+
+ vfenezb %v16,%v16,%v16 /* Find element not equal with zero search. */
+ clgr %r1,%r3
+ locgrh %r1,%r3 /* loaded_byte_count
+ = min (loaded_byte_count, maxlen) */
+
+ vlgvb %r5,%v16,7 /* Load zero index or 16 if not found. */
+ clr %r5,%r1 /* If found zero within loaded bytes? */
+ locgrl %r2,%r5 /* Then copy return value. */
+ blr %r14 /* And return. */
+
+ clgr %r1,%r3 /* If loaded_byte_count == maxlen? */
+ locgre %r2,%r3 /* Then copy return value. */
+ ber %r14 /* And return. */
+
+ /* Align s to 16 byte. */
+ risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
+ lghi %r5,16 /* current_len = 16. */
+ slr %r5,%r4 /* Compute bytes to 16bytes boundary. */
+
+ lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
+ aghi %r1,64
+ clgrjl %r1,%r3,.Lloop64
+
+ /* Find zero in max 64byte with aligned s. */
+.Llt64:
+ vl %v16,0(%r5,%r2) /* Load s. */
+ vfenezbs %v16,%v16,%v16 /* Find element not equal with zero search. */
+ je .Lfound /* Jump away if zero was found. */
+ aghi %r5,16
+ clgrjhe %r5,%r3,.Lfound /* current_len >= maxlen -> end. */
+ vl %v16,0(%r5,%r2)
+ vfenezbs %v16,%v16,%v16
+ je .Lfound
+ aghi %r5,16
+ clgrjhe %r5,%r3,.Lfound
+ vl %v16,0(%r5,%r2)
+ vfenezbs %v16,%v16,%v16
+ je .Lfound
+ aghi %r5,16
+ clgrjhe %r5,%r3,.Lfound
+ vl %v16,0(%r5,%r2)
+ vfenezbs %v16,%v16,%v16
+ j .Lfound
+
+.Lfound48:
+ aghi %r5,16
+.Lfound32:
+ aghi %r5,16
+.Lfound16:
+ aghi %r5,16
+.Lfound:
+ vlgvb %r4,%v16,7 /* Load byte index of zero or 16 if no zero. */
+ algr %r5,%r4
+
+ clgr %r5,%r3
+ locgrh %r5,%r3 /* Return min (current_len, maxlen). */
+ lgr %r2,%r5
+ br %r14
+
+ /* Find zero in 16 byte aligned loop. */
+.Lloop64:
+ vl %v16,0(%r5,%r2) /* Load s. */
+ vfenezbs %v16,%v16,%v16 /* Find element not equal with zero search. */
+ je .Lfound /* Jump away if zero was found. */
+ vl %v16,16(%r5,%r2)
+ vfenezbs %v16,%v16,%v16
+ je .Lfound16
+ vl %v16,32(%r5,%r2)
+ vfenezbs %v16,%v16,%v16
+ je .Lfound32
+ vl %v16,48(%r5,%r2)
+ vfenezbs %v16,%v16,%v16
+ je .Lfound48
+
+ aghi %r5,64
+ lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
+ aghi %r1,64
+ clgrjl %r1,%r3,.Lloop64
+
+ j .Llt64
+END(__strnlen_vx)
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/strnlen.c b/sysdeps/s390/multiarch/strnlen.c
new file mode 100644
index 0000000..51659de
--- /dev/null
+++ b/sysdeps/s390/multiarch/strnlen.c
@@ -0,0 +1,29 @@
+/* Multiple versions of strnlen.
+ 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 (__strnlen)
+weak_alias (__strnlen, strnlen)
+libc_hidden_def (strnlen)
+
+#else
+# include <string/strnlen.c>
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
diff --git a/sysdeps/s390/multiarch/wcsnlen-c.c b/sysdeps/s390/multiarch/wcsnlen-c.c
new file mode 100644
index 0000000..1ead4b1
--- /dev/null
+++ b/sysdeps/s390/multiarch/wcsnlen-c.c
@@ -0,0 +1,25 @@
+/* Default wcsnlen 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 WCSNLEN __wcsnlen_c
+
+# include <wchar.h>
+extern __typeof (__wcsnlen) __wcsnlen_c;
+# include <wcsmbs/wcsnlen.c>
+#endif
diff --git a/sysdeps/s390/multiarch/wcsnlen-vx.S b/sysdeps/s390/multiarch/wcsnlen-vx.S
new file mode 100644
index 0000000..7932e1b
--- /dev/null
+++ b/sysdeps/s390/multiarch/wcsnlen-vx.S
@@ -0,0 +1,151 @@
+/* Vector optimized 32/64 bit S/390 version of wcsnlen.
+ 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
+
+/* size_t wcsnlen (const wchar_t *s, size_t maxlen)
+ Returns the number of characters in s or at most maxlen.
+
+ Register usage:
+ -r1=tmp
+ -r2=address of string
+ -r3=maxlen (number of characters to be read)
+ -r4=tmp
+ -r5=current_len and return_value
+ -v16=part of s
+*/
+ENTRY(__wcsnlen_vx)
+
+ .machine "z13"
+ .machinemode "zarch_nohighgprs"
+
+# if !defined __s390x__
+ llgfr %r3,%r3
+# endif /* !defined __s390x__ */
+
+ clgfi %r3,0 /* if maxlen == 0, return 0. */
+ locgre %r2,%r3
+ ber %r14
+
+ vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */
+ lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */
+ llgfr %r1,%r1 /* Convert 32bit to 64bit. */
+
+ tmll %r2,3 /* Test if s is 4-byte aligned? */
+ jne .Lfallback /* And use common-code variant if not. */
+
+ /* Check range of maxlen and convert to byte-count. */
+# ifdef __s390x__
+ tmhh %r3,49152 /* Test bit 0 or 1 of maxlen. */
+ lghi %r4,-4 /* Max byte-count is 18446744073709551612. */
+# else
+ tmlh %r3,49152 /* Test bit 0 or 1 of maxlen. */
+ llilf %r4,4294967292 /* Max byte-count is 4294967292. */
+# endif /* !__s390x__ */
+ sllg %r3,%r3,2 /* Convert character-count to byte-count. */
+ locgrne %r3,%r4 /* Use max byte-count, if bit 0/1 was one. */
+
+ vfenezf %v16,%v16,%v16 /* Find element not equal with zero search. */
+ clgr %r1,%r3
+ locgrh %r1,%r3 /* loaded_byte_count
+ = min (loaded_byte_count, maxlen) */
+
+ vlgvb %r5,%v16,7 /* Load zero index or 16 if not found. */
+ clrjl %r5,%r1,.Lend /* Found zero within loaded bytes -> return. */
+
+ clgr %r1,%r3 /* If loaded_byte_count == maxlen -> end. */
+ locgre %r5,%r3
+ je .Lend
+
+ /* Align s to 16 byte. */
+ risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
+ lghi %r5,16 /* current_len = 16. */
+ slr %r5,%r4 /* Compute bytes to 16bytes boundary. */
+
+ lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
+ aghi %r1,64
+ clgrjl %r1,%r3,.Lloop64
+
+ /* Find zero in max 64byte with aligned s. */
+.Llt64:
+ vl %v16,0(%r5,%r2) /* Load s. */
+ vfenezfs %v16,%v16,%v16 /* Find element not equal with zero search. */
+ je .Lfound /* Jump away if zero was found. */
+ aghi %r5,16
+ clgrjhe %r5,%r3,.Lfound /* If current_len >= maxlen -> end. */
+ vl %v16,0(%r5,%r2)
+ vfenezfs %v16,%v16,%v16
+ je .Lfound
+ aghi %r5,16
+ clgrjhe %r5,%r3,.Lfound
+ vl %v16,0(%r5,%r2)
+ vfenezfs %v16,%v16,%v16
+ je .Lfound
+ aghi %r5,16
+ clgrjhe %r5,%r3,.Lfound
+ vl %v16,0(%r5,%r2)
+ vfenezfs %v16,%v16,%v16
+ j .Lfound
+
+.Lfound48:
+ aghi %r5,16
+.Lfound32:
+ aghi %r5,16
+.Lfound16:
+ aghi %r5,16
+.Lfound:
+ vlgvb %r4,%v16,7 /* Load byte index of zero or 16 if no zero. */
+ algr %r5,%r4
+
+ clgr %r5,%r3
+ locgrh %r5,%r3 /* Return min (current_len, maxlen). */
+.Lend:
+ srlg %r2,%r5,2 /* Convert byte-count to character-count. */
+ br %r14
+
+ /* Find zero in 16byte aligned loop. */
+.Lloop64:
+ vl %v16,0(%r5,%r2) /* Load s. */
+ vfenezfs %v16,%v16,%v16 /* Find element not equal with zero search. */
+ je .Lfound /* Jump away if zero was found. */
+ vl %v16,16(%r5,%r2)
+ vfenezfs %v16,%v16,%v16
+ je .Lfound16
+ vl %v16,32(%r5,%r2)
+ vfenezfs %v16,%v16,%v16
+ je .Lfound32
+ vl %v16,48(%r5,%r2)
+ vfenezfs %v16,%v16,%v16
+ je .Lfound48
+
+ aghi %r5,64
+ lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
+ aghi %r1,64
+ clgrjl %r1,%r3,.Lloop64
+
+ j .Llt64
+
+.Lfallback:
+ jg __wcsnlen_c
+END(__wcsnlen_vx)
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/wcsnlen.c b/sysdeps/s390/multiarch/wcsnlen.c
new file mode 100644
index 0000000..bf2fd63
--- /dev/null
+++ b/sysdeps/s390/multiarch/wcsnlen.c
@@ -0,0 +1,28 @@
+/* Multiple versions of wcsnlen.
+ 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 <wchar.h>
+# include <ifunc-resolve.h>
+
+s390_vx_libc_ifunc (__wcsnlen)
+weak_alias (__wcsnlen, wcsnlen)
+
+#else
+# include <wcsmbs/wcsnlen.c>
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
diff --git a/wcsmbs/Makefile b/wcsmbs/Makefile
index 44a4494..3858d74 100644
--- a/wcsmbs/Makefile
+++ b/wcsmbs/Makefile
@@ -42,7 +42,7 @@ routines := wcscat wcschr wcscmp wcscpy wcscspn wcsdup wcslen wcsncat \
isoc99_swscanf isoc99_vswscanf \
mbrtoc16 c16rtomb
-strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy
+strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen
tests := tst-wcstof wcsmbs-tst1 tst-wcsnlen tst-btowc tst-mbrtowc \
tst-wcrtomb tst-wcpncpy tst-mbsrtowcs tst-wchar-h tst-mbrtowc2 \
tst-c16c32-1 wcsatcliff $(addprefix test-,$(strop-tests))
diff --git a/wcsmbs/test-wcsnlen.c b/wcsmbs/test-wcsnlen.c
new file mode 100644
index 0000000..262ab30
--- /dev/null
+++ b/wcsmbs/test-wcsnlen.c
@@ -0,0 +1,20 @@
+/* Test wcsnlen function.
+ 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 "../string/test-strnlen.c"
diff --git a/wcsmbs/wcsnlen.c b/wcsmbs/wcsnlen.c
index 2bee705..e928ab6 100644
--- a/wcsmbs/wcsnlen.c
+++ b/wcsmbs/wcsnlen.c
@@ -18,8 +18,11 @@
#include <wchar.h>
+#ifdef WCSNLEN
+# define __wcsnlen WCSNLEN
+#endif
-/* Copy SRC to DEST. */
+/* Return length of string S at most maxlen. */
size_t
__wcsnlen (s, maxlen)
const wchar_t *s;
@@ -44,4 +47,6 @@ __wcsnlen (s, maxlen)
return len;
}
+#ifndef WCSNLEN
weak_alias (__wcsnlen, wcsnlen)
+#endif
--
1.8.4.2