Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 192 insertions, 0 deletions

diff --git a/REORG.TODO/benchtests/bench-strspn.c b/REORG.TODO/benchtests/bench-strspn.c
new file mode 100644
index 0000000000..81bc170bfe
--- /dev/null
+++ b/REORG.TODO/benchtests/bench-strspn.c
@@ -0,0 +1,192 @@
+/* Measure strspn functions.
+   Copyright (C) 2013-2017 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
+# define TEST_NAME "strspn"
+#else
+# define TEST_NAME "wcsspn"
+#endif /* WIDE */
+#include "bench-string.h"
+
+#ifndef WIDE
+# define STRSPN strspn
+# define CHAR char
+# define SIMPLE_STRSPN simple_strspn
+# define STUPID_STRSPN stupid_strspn
+# define STRLEN strlen
+# define STRCHR strchr
+# define BIG_CHAR CHAR_MAX
+# define SMALL_CHAR 127
+#else
+# include <wchar.h>
+# define STRSPN wcsspn
+# define CHAR wchar_t
+# define SIMPLE_STRSPN simple_wcsspn
+# define STUPID_STRSPN stupid_wcsspn
+# define STRLEN wcslen
+# define STRCHR wcschr
+# define BIG_CHAR WCHAR_MAX
+# define SMALL_CHAR 1273
+#endif /* WIDE */
+
+typedef size_t (*proto_t) (const CHAR *, const CHAR *);
+size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);
+size_t STUPID_STRSPN (const CHAR *, const CHAR *);
+
+IMPL (STUPID_STRSPN, 0)
+IMPL (SIMPLE_STRSPN, 0)
+IMPL (STRSPN, 1)
+
+size_t
+SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)
+{
+  const CHAR *r, *str = s;
+  CHAR c;
+
+  while ((c = *s++) != '\0')
+    {
+      for (r = acc; *r != '\0'; ++r)
+	if (*r == c)
+	  break;
+      if (*r == '\0')
+	return s - str - 1;
+    }
+  return s - str - 1;
+}
+
+size_t
+STUPID_STRSPN (const CHAR *s, const CHAR *acc)
+{
+  size_t ns = STRLEN (s), nacc = STRLEN (acc);
+  size_t i, j;
+
+  for (i = 0; i < ns; ++i)
+    {
+      for (j = 0; j < nacc; ++j)
+	if (s[i] == acc[j])
+	  break;
+      if (j == nacc)
+	return i;
+    }
+  return i;
+}
+
+static void
+do_one_test (impl_t *impl, const CHAR *s, const CHAR *acc, size_t exp_res)
+{
+  size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS;
+  timing_t start, stop, cur;
+
+  if (res != exp_res)
+    {
+      error (0, 0, "Wrong result in function %s %p %p", impl->name,
+	     (void *) res, (void *) exp_res);
+      ret = 1;
+      return;
+    }
+
+  TIMING_NOW (start);
+  for (i = 0; i < iters; ++i)
+    {
+      CALL (impl, s, acc);
+    }
+  TIMING_NOW (stop);
+
+  TIMING_DIFF (cur, start, stop);
+
+  TIMING_PRINT_MEAN ((double) cur, (double) iters);
+}
+
+static void
+do_test (size_t align, size_t pos, size_t len)
+{
+  size_t i;
+  CHAR *acc, *s;
+
+  align &= 7;
+  if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240 || ! len)
+    return;
+
+  acc = (CHAR *) (buf2) + (random () & 255);
+  s = (CHAR *) (buf1) + align;
+
+  for (i = 0; i < len; ++i)
+    {
+      acc[i] = random () & BIG_CHAR;
+      if (!acc[i])
+	acc[i] = random () & BIG_CHAR;
+      if (!acc[i])
+	acc[i] = 1 + (random () & SMALL_CHAR);
+    }
+  acc[len] = '\0';
+
+  for (i = 0; i < pos; ++i)
+    s[i] = acc[random () % len];
+  s[pos] = random () & BIG_CHAR;
+  if (STRCHR (acc, s[pos]))
+    s[pos] = '\0';
+  else
+    {
+      for (i = pos + 1; i < pos + 10; ++i)
+	s[i] = random () & BIG_CHAR;
+      s[i] = '\0';
+    }
+
+  printf ("Length %4zd, alignment %2zd, acc len %2zd:", pos, align, len);
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, s, acc, pos);
+
+  putchar ('\n');
+}
+
+int
+test_main (void)
+{
+  size_t i;
+
+  test_init ();
+
+  printf ("%32s", "");
+  FOR_EACH_IMPL (impl, 0)
+    printf ("\t%s", impl->name);
+  putchar ('\n');
+
+  for (i = 0; i < 32; ++i)
+    {
+      do_test (0, 512, i);
+      do_test (i, 512, i);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (0, 16 << i, 4);
+      do_test (i, 16 << i, 4);
+    }
+
+  for (i = 1; i < 8; ++i)
+    do_test (i, 64, 10);
+
+  for (i = 0; i < 64; ++i)
+    do_test (0, i, 6);
+
+  return ret;
+}
+
+#include <support/test-driver.c>