Copy over string performance tests into benchtests

Copy over already existing string performance tests into benchtests.
Bits not related to performance measurements have been omitted.

1 files changed, 206 insertions, 0 deletions

diff --git a/benchtests/bench-strchr.c b/benchtests/bench-strchr.c
new file mode 100644
index 0000000000..710b59203d
--- /dev/null
+++ b/benchtests/bench-strchr.c
@@ -0,0 +1,206 @@
+/* Measure STRCHR functions.
+   Copyright (C) 2013 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 TEST_MAIN
+#ifndef WIDE
+# ifdef USE_FOR_STRCHRNUL
+#  define TEST_NAME "strchrnul"
+# else
+#  define TEST_NAME "strchr"
+# endif
+#else
+# define TEST_NAME "wcschr"
+#endif
+#include "bench-string.h"
+
+#ifndef WIDE
+# ifdef USE_FOR_STRCHRNUL
+#  define STRCHR strchrnul
+#  define stupid_STRCHR stupid_STRCHRNUL
+#  define simple_STRCHR simple_STRCHRNUL
+# else
+#  define STRCHR strchr
+# endif
+# define STRLEN strlen
+# define CHAR char
+# define BIG_CHAR CHAR_MAX
+# define MIDDLE_CHAR 127
+# define SMALL_CHAR 23
+# define UCHAR unsigned char
+#else
+# include <wchar.h>
+# define STRCHR wcschr
+# define STRLEN wcslen
+# define CHAR wchar_t
+# define BIG_CHAR WCHAR_MAX
+# define MIDDLE_CHAR 1121
+# define SMALL_CHAR 851
+# define UCHAR wchar_t
+#endif
+
+#ifdef USE_FOR_STRCHRNUL
+# define NULLRET(endptr) endptr
+#else
+# define NULLRET(endptr) NULL
+#endif
+
+
+typedef CHAR *(*proto_t) (const CHAR *, int);
+
+CHAR *
+simple_STRCHR (const CHAR *s, int c)
+{
+  for (; *s != (CHAR) c; ++s)
+    if (*s == '\0')
+      return NULLRET ((CHAR *) s);
+  return (CHAR *) s;
+}
+
+CHAR *
+stupid_STRCHR (const CHAR *s, int c)
+{
+  size_t n = STRLEN (s) + 1;
+
+  while (n--)
+    if (*s++ == (CHAR) c)
+      return (CHAR *) s - 1;
+  return NULLRET ((CHAR *) s - 1);
+}
+
+IMPL (stupid_STRCHR, 0)
+IMPL (simple_STRCHR, 0)
+IMPL (STRCHR, 1)
+
+static void
+do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
+{
+  if (HP_TIMING_AVAIL)
+    {
+      hp_timing_t start __attribute ((unused));
+      hp_timing_t stop __attribute ((unused));
+      hp_timing_t best_time = ~ (hp_timing_t) 0;
+      size_t i;
+
+      for (i = 0; i < 32; ++i)
+	{
+	  HP_TIMING_NOW (start);
+	  CALL (impl, s, c);
+	  HP_TIMING_NOW (stop);
+	  HP_TIMING_BEST (best_time, start, stop);
+	}
+
+      printf ("\t%zd", (size_t) best_time);
+    }
+}
+
+static void
+do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
+/* For wcschr: align here means align not in bytes,
+   but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
+   len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
+{
+  size_t i;
+  CHAR *result;
+  CHAR *buf = (CHAR *) buf1;
+  align &= 15;
+  if ((align + len) * sizeof (CHAR) >= page_size)
+    return;
+
+  for (i = 0; i < len; ++i)
+    {
+      buf[align + i] = 32 + 23 * i % max_char;
+      if (buf[align + i] == seek_char)
+	buf[align + i] = seek_char + 1;
+      else if (buf[align + i] == 0)
+	buf[align + i] = 1;
+    }
+  buf[align + len] = 0;
+
+  if (pos < len)
+    {
+      buf[align + pos] = seek_char;
+      result = buf + align + pos;
+    }
+  else if (seek_char == 0)
+    result = buf + align + len;
+  else
+    result = NULLRET (buf + align + len);
+
+  if (HP_TIMING_AVAIL)
+    printf ("Length %4zd, alignment in bytes %2zd:",
+	    pos, align * sizeof (CHAR));
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, buf + align, seek_char, result);
+
+  if (HP_TIMING_AVAIL)
+    putchar ('\n');
+}
+
+int
+test_main (void)
+{
+  size_t i;
+
+  test_init ();
+
+  printf ("%20s", "");
+  FOR_EACH_IMPL (impl, 0)
+    printf ("\t%s", impl->name);
+  putchar ('\n');
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
+      do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
+      do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
+    }
+
+  for (i = 0; i < 32; ++i)
+    {
+      do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
+      do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
+      do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (i, 64, 256, 0, MIDDLE_CHAR);
+      do_test (i, 64, 256, 0, BIG_CHAR);
+    }
+
+  for (i = 0; i < 32; ++i)
+    {
+      do_test (0, i, i + 1, 0, MIDDLE_CHAR);
+      do_test (0, i, i + 1, 0, BIG_CHAR);
+    }
+
+  return ret;
+}
+
+#include "../test-skeleton.c"