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, 142 insertions, 0 deletions

diff --git a/REORG.TODO/benchtests/bench-strlen.c b/REORG.TODO/benchtests/bench-strlen.c
new file mode 100644
index 0000000000..8aea770707
--- /dev/null
+++ b/REORG.TODO/benchtests/bench-strlen.c
@@ -0,0 +1,142 @@
+/* Measure STRLEN 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 "strlen"
+#else
+# define TEST_NAME "wcslen"
+#endif
+#include "bench-string.h"
+
+#ifndef WIDE
+# define STRLEN strlen
+# define CHAR char
+# define MAX_CHAR CHAR_MAX
+#else
+# include <wchar.h>
+# define STRLEN wcslen
+# define CHAR wchar_t
+# define MAX_CHAR WCHAR_MAX
+#endif
+
+typedef size_t (*proto_t) (const CHAR *);
+
+size_t
+simple_STRLEN (const CHAR *s)
+{
+  const CHAR *p;
+
+  for (p = s; *p; ++p);
+  return p - s;
+}
+
+#ifndef WIDE
+size_t
+builtin_strlen (const CHAR *p)
+{
+  return __builtin_strlen (p);
+}
+IMPL (builtin_strlen, 0)
+#endif
+
+IMPL (simple_STRLEN, 0)
+IMPL (STRLEN, 1)
+
+
+static void
+do_one_test (impl_t *impl, const CHAR *s, size_t exp_len)
+{
+  size_t len = CALL (impl, s), i, iters = INNER_LOOP_ITERS;
+  timing_t start, stop, cur;
+
+  if (len != exp_len)
+    {
+      error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
+	     len, exp_len);
+      ret = 1;
+      return;
+    }
+
+  TIMING_NOW (start);
+  for (i = 0; i < iters; ++i)
+    {
+      CALL (impl, s);
+    }
+  TIMING_NOW (stop);
+
+  TIMING_DIFF (cur, start, stop);
+
+  TIMING_PRINT_MEAN ((double) cur, (double) iters);
+}
+
+static void
+do_test (size_t align, size_t len)
+{
+  size_t i;
+
+  align &= 63;
+  if (align + sizeof(CHAR) * len >= page_size)
+    return;
+
+  CHAR *buf = (CHAR *) (buf1);
+
+  for (i = 0; i < len; ++i)
+    buf[align + i] = 1 + 11111 * i % MAX_CHAR;
+  buf[align + len] = 0;
+
+  printf ("Length %4zd, alignment %2zd:", len, align);
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, (CHAR *) (buf + align), len);
+
+  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');
+
+  /* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/
+
+  for (i = 1; i < 8; ++i)
+  {
+    do_test (sizeof(CHAR) * i, i);
+    do_test (0, i);
+  }
+
+  for (i = 2; i <= 12; ++i)
+    {
+      do_test (0, 1 << i);
+      do_test (sizeof(CHAR) * 7, 1 << i);
+      do_test (sizeof(CHAR) * i, 1 << i);
+      do_test (sizeof(CHAR) * i, (size_t)((1 << i) / 1.5));
+    }
+
+  return ret;
+}
+
+#include <support/test-driver.c>