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, 184 insertions, 0 deletions

diff --git a/REORG.TODO/benchtests/bench-strrchr.c b/REORG.TODO/benchtests/bench-strrchr.c
new file mode 100644
index 0000000000..8af363aed9
--- /dev/null
+++ b/REORG.TODO/benchtests/bench-strrchr.c
@@ -0,0 +1,184 @@
+/* Measure STRCHR 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
+#ifdef WIDE
+# define TEST_NAME "wcsrchr"
+#else
+# define TEST_NAME "strrchr"
+#endif
+#include "bench-string.h"
+
+#ifdef WIDE
+# include <wchar.h>
+# define SIMPLE_STRRCHR simple_wcsrchr
+# define STRRCHR wcsrchr
+# define CHAR wchar_t
+# define UCHAR wchar_t
+# define BIG_CHAR WCHAR_MAX
+# define SMALL_CHAR 1273
+#else
+# define SIMPLE_STRRCHR simple_strrchr
+# define STRRCHR strrchr
+# define CHAR char
+# define UCHAR unsigned char
+# define BIG_CHAR CHAR_MAX
+# define SMALL_CHAR 127
+#endif
+
+typedef CHAR *(*proto_t) (const CHAR *, int);
+CHAR *SIMPLE_STRRCHR (const CHAR *, int);
+
+IMPL (SIMPLE_STRRCHR, 0)
+IMPL (STRRCHR, 1)
+
+CHAR *
+SIMPLE_STRRCHR (const CHAR *s, int c)
+{
+  const CHAR *ret = NULL;
+
+  for (; *s != '\0'; ++s)
+    if (*s == (CHAR) c)
+      ret = s;
+
+  return (CHAR *) (c == '\0' ? s : ret);
+}
+
+static void
+do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res)
+{
+  CHAR *res = CALL (impl, s, c);
+  size_t 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,
+	     res, exp_res);
+      ret = 1;
+      return;
+    }
+
+  TIMING_NOW (start);
+  for (i = 0; i < iters; ++i)
+    {
+      CALL (impl, s, c);
+    }
+  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, int seek_char, int max_char)
+/* For wcsrchr: 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 &= 7;
+  if ((align + len) * sizeof (CHAR) >= page_size)
+    return;
+
+  for (i = 0; i < len; ++i)
+    {
+      buf[align + i] = (random () * random ()) & max_char;
+      if (!buf[align + i])
+	buf[align + i] = (random () * random ()) & max_char;
+      if (!buf[align + i])
+	buf[align + i] = 1;
+      if ((i > pos || pos >= len) && buf[align + i] == seek_char)
+	buf[align + i] = seek_char + 10 + (random () & 15);
+    }
+  buf[align + len] = 0;
+
+  if (pos < len)
+    {
+      buf[align + pos] = seek_char;
+      result = (CHAR *) (buf + align + pos);
+    }
+  else if (seek_char == 0)
+    result = (CHAR *) (buf + align + len);
+  else
+    result = NULL;
+
+  printf ("Length %4zd, alignment in bytes %2zd:", len, align * sizeof (CHAR));
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, (CHAR *) (buf + align), seek_char, result);
+
+  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, 23, SMALL_CHAR);
+      do_test (i, 16 << i, 2048, 23, SMALL_CHAR);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (i, 64, 256, 23, SMALL_CHAR);
+      do_test (i, 64, 256, 23, BIG_CHAR);
+    }
+
+  for (i = 0; i < 32; ++i)
+    {
+      do_test (0, i, i + 1, 23, SMALL_CHAR);
+      do_test (0, i, i + 1, 23, BIG_CHAR);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (0, 16 << i, 2048, 0, SMALL_CHAR);
+      do_test (i, 16 << i, 2048, 0, SMALL_CHAR);
+    }
+
+  for (i = 1; i < 8; ++i)
+    {
+      do_test (i, 64, 256, 0, SMALL_CHAR);
+      do_test (i, 64, 256, 0, BIG_CHAR);
+    }
+
+  for (i = 0; i < 32; ++i)
+    {
+      do_test (0, i, i + 1, 0, SMALL_CHAR);
+      do_test (0, i, i + 1, 0, BIG_CHAR);
+    }
+
+  return ret;
+}
+
+#include <support/test-driver.c>