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authorStefan Liebler <stli@linux.vnet.ibm.com>2015-08-26 10:26:20 +0200
committerAndreas Krebbel <krebbel@linux.vnet.ibm.com>2015-08-26 10:26:20 +0200
commitfcf40ebe2682fd65d64f94d69a3df798960cf1b7 (patch)
tree45b1b3ea6b9a5105a81ca6d7fe351b79a9042eb6 /benchtests
parent9472f35a0a6dbbda82ce103aaf0f5013f5d46e34 (diff)
downloadglibc-fcf40ebe2682fd65d64f94d69a3df798960cf1b7.tar.gz
S390: Optimize strnlen and wcsnlen.
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.
Diffstat (limited to 'benchtests')
-rw-r--r--benchtests/Makefile2
-rw-r--r--benchtests/bench-strnlen.c71
-rw-r--r--benchtests/bench-wcsnlen.c20
3 files changed, 67 insertions, 26 deletions
diff --git a/benchtests/Makefile b/benchtests/Makefile
index 5d4afabc52..295738eede 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 35266e5bf9..cbdce75b74 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 0000000000..2b5a51cabf
--- /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"