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, 213 insertions, 0 deletions

diff --git a/benchtests/bench-strncasecmp.c b/benchtests/bench-strncasecmp.c
new file mode 100644
index 0000000000..5fa9220cb0
--- /dev/null
+++ b/benchtests/bench-strncasecmp.c
@@ -0,0 +1,213 @@
+/* Measure strncasecmp 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/>.  */
+
+#include <ctype.h>
+#define TEST_MAIN
+#define TEST_NAME "strncasecmp"
+#include "bench-string.h"
+
+typedef int (*proto_t) (const char *, const char *, size_t);
+static int simple_strncasecmp (const char *, const char *, size_t);
+static int stupid_strncasecmp (const char *, const char *, size_t);
+
+IMPL (stupid_strncasecmp, 0)
+IMPL (simple_strncasecmp, 0)
+IMPL (strncasecmp, 1)
+
+static int
+simple_strncasecmp (const char *s1, const char *s2, size_t n)
+{
+  int ret;
+
+  if (n == 0)
+    return 0;
+
+  while ((ret = ((unsigned char) tolower (*s1)
+		 - (unsigned char) tolower (*s2))) == 0
+	 && *s1++)
+    {
+      if (--n == 0)
+	return 0;
+      ++s2;
+    }
+  return ret;
+}
+
+static int
+stupid_strncasecmp (const char *s1, const char *s2, size_t max)
+{
+  size_t ns1 = strlen (s1) + 1;
+  size_t ns2 = strlen (s2) + 1;
+  size_t n = ns1 < ns2 ? ns1 : ns2;
+  if (n > max)
+    n = max;
+  int ret = 0;
+
+  while (n--)
+    {
+      if ((ret = ((unsigned char) tolower (*s1)
+		  - (unsigned char) tolower (*s2))) != 0)
+	break;
+      ++s1;
+      ++s2;
+    }
+  return ret;
+}
+
+static void
+do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n,
+	     int exp_result)
+{
+  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, s1, s2, n);
+	  HP_TIMING_NOW (stop);
+	  HP_TIMING_BEST (best_time, start, stop);
+	}
+
+      printf ("\t%zd", (size_t) best_time);
+    }
+}
+
+static void
+do_test (size_t align1, size_t align2, size_t n, size_t len, int max_char,
+	 int exp_result)
+{
+  size_t i;
+  char *s1, *s2;
+
+  if (len == 0)
+    return;
+
+  align1 &= 7;
+  if (align1 + len + 1 >= page_size)
+    return;
+
+  align2 &= 7;
+  if (align2 + len + 1 >= page_size)
+    return;
+
+  s1 = (char *) (buf1 + align1);
+  s2 = (char *) (buf2 + align2);
+
+  for (i = 0; i < len; i++)
+    {
+      s1[i] = toupper (1 + 23 * i % max_char);
+      s2[i] = tolower (s1[i]);
+    }
+
+  s1[len] = s2[len] = 0;
+  s1[len + 1] = 23;
+  s2[len + 1] = 24 + exp_result;
+  if ((s2[len - 1] == 'z' && exp_result == -1)
+      || (s2[len - 1] == 'a' && exp_result == 1))
+    s1[len - 1] += exp_result;
+  else
+    s2[len - 1] -= exp_result;
+
+  if (HP_TIMING_AVAIL)
+    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, s1, s2, n, exp_result);
+
+  if (HP_TIMING_AVAIL)
+    putchar ('\n');
+}
+
+int
+test_main (void)
+{
+  size_t i;
+
+  test_init ();
+
+  printf ("%23s", "");
+  FOR_EACH_IMPL (impl, 0)
+    printf ("\t%s", impl->name);
+  putchar ('\n');
+
+  for (i = 1; i < 16; ++i)
+    {
+      do_test (i, i, i - 1, i, 127, 0);
+
+      do_test (i, i, i, i, 127, 0);
+      do_test (i, i, i, i, 127, 1);
+      do_test (i, i, i, i, 127, -1);
+
+      do_test (i, i, i + 1, i, 127, 0);
+      do_test (i, i, i + 1, i, 127, 1);
+      do_test (i, i, i + 1, i, 127, -1);
+    }
+
+  for (i = 1; i < 10; ++i)
+    {
+      do_test (0, 0, (2 << i) - 1, 2 << i, 127, 0);
+      do_test (0, 0, 2 << i, 2 << i, 254, 0);
+      do_test (0, 0, (2 << i) + 1, 2 << i, 127, 0);
+
+      do_test (0, 0, (2 << i) + 1, 2 << i, 254, 0);
+
+      do_test (0, 0, 2 << i, 2 << i, 127, 1);
+      do_test (0, 0, (2 << i) + 10, 2 << i, 127, 1);
+
+      do_test (0, 0, 2 << i, 2 << i, 254, 1);
+      do_test (0, 0, (2 << i) + 10, 2 << i, 254, 1);
+
+      do_test (0, 0, 2 << i, 2 << i, 127, -1);
+      do_test (0, 0, (2 << i) + 10, 2 << i, 127, -1);
+
+      do_test (0, 0, 2 << i, 2 << i, 254, -1);
+      do_test (0, 0, (2 << i) + 10, 2 << i, 254, -1);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (i, 2 * i, (8 << i) - 1, 8 << i, 127, 0);
+      do_test (i, 2 * i, 8 << i, 8 << i, 127, 0);
+      do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, 0);
+
+      do_test (2 * i, i, (8 << i) - 1, 8 << i, 254, 0);
+      do_test (2 * i, i, 8 << i, 8 << i, 254, 0);
+      do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, 0);
+
+      do_test (i, 2 * i, 8 << i, 8 << i, 127, 1);
+      do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, 1);
+
+      do_test (2 * i, i, 8 << i, 8 << i, 254, 1);
+      do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, 1);
+
+      do_test (i, 2 * i, 8 << i, 8 << i, 127, -1);
+      do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, -1);
+
+      do_test (2 * i, i, 8 << i, 8 << i, 254, -1);
+      do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, -1);
+    }
+
+  return ret;
+}
+
+#include "../test-skeleton.c"