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, 193 insertions, 0 deletions

diff --git a/REORG.TODO/benchtests/bench-memset.c b/REORG.TODO/benchtests/bench-memset.c
new file mode 100644
index 0000000000..dc7944c596
--- /dev/null
+++ b/REORG.TODO/benchtests/bench-memset.c
@@ -0,0 +1,193 @@
+/* Measure memset 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 TEST_BZERO
+# define TEST_NAME "bzero"
+#else
+# ifndef WIDE
+#  define TEST_NAME "memset"
+# else
+#  define TEST_NAME "wmemset"
+# endif /* WIDE */
+#endif /* !TEST_BZERO */
+#define MIN_PAGE_SIZE 131072
+#include "bench-string.h"
+
+#ifndef WIDE
+# define MEMSET memset
+# define CHAR char
+# define SIMPLE_MEMSET simple_memset
+# define MEMCMP memcmp
+#else
+# include <wchar.h>
+# define MEMSET wmemset
+# define CHAR wchar_t
+# define SIMPLE_MEMSET simple_wmemset
+# define MEMCMP wmemcmp
+#endif /* WIDE */
+
+CHAR *SIMPLE_MEMSET (CHAR *, int, size_t);
+
+#ifdef TEST_BZERO
+typedef void (*proto_t) (char *, size_t);
+void simple_bzero (char *, size_t);
+void builtin_bzero (char *, size_t);
+
+IMPL (simple_bzero, 0)
+IMPL (builtin_bzero, 0)
+IMPL (bzero, 1)
+
+void
+simple_bzero (char *s, size_t n)
+{
+  SIMPLE_MEMSET (s, 0, n);
+}
+
+void
+builtin_bzero (char *s, size_t n)
+{
+  __builtin_bzero (s, n);
+}
+#else
+typedef CHAR *(*proto_t) (CHAR *, int, size_t);
+
+IMPL (SIMPLE_MEMSET, 0)
+# ifndef WIDE
+char *builtin_memset (char *, int, size_t);
+IMPL (builtin_memset, 0)
+# endif /* !WIDE */
+IMPL (MEMSET, 1)
+
+# ifndef WIDE
+char *
+builtin_memset (char *s, int c, size_t n)
+{
+  return __builtin_memset (s, c, n);
+}
+# endif /* !WIDE */
+#endif /* !TEST_BZERO */
+
+CHAR *
+inhibit_loop_to_libcall
+SIMPLE_MEMSET (CHAR *s, int c, size_t n)
+{
+  CHAR *r = s, *end = s + n;
+  while (r < end)
+    *r++ = c;
+  return s;
+}
+
+static void
+do_one_test (impl_t *impl, CHAR *s, int c __attribute ((unused)), size_t n)
+{
+  size_t i, iters = INNER_LOOP_ITERS;
+  timing_t start, stop, cur;
+  CHAR tstbuf[n];
+#ifdef TEST_BZERO
+  simple_bzero (tstbuf, n);
+  CALL (impl, s, n);
+  if (memcmp (s, tstbuf, n) != 0)
+#else
+  CHAR *res = CALL (impl, s, c, n);
+  if (res != s
+      || SIMPLE_MEMSET (tstbuf, c, n) != tstbuf
+      || MEMCMP (s, tstbuf, n) != 0)
+#endif /* !TEST_BZERO */
+    {
+      error (0, 0, "Wrong result in function %s", impl->name);
+      ret = 1;
+      return;
+    }
+
+  TIMING_NOW (start);
+  for (i = 0; i < iters; ++i)
+    {
+#ifdef TEST_BZERO
+      CALL (impl, s, n);
+#else
+      CALL (impl, s, c, n);
+#endif /* !TEST_BZERO */
+    }
+  TIMING_NOW (stop);
+
+  TIMING_DIFF (cur, start, stop);
+
+  TIMING_PRINT_MEAN ((double) cur, (double) iters);
+}
+
+static void
+do_test (size_t align, int c, size_t len)
+{
+  align &= 63;
+  if ((align + len) * sizeof (CHAR) > page_size)
+    return;
+
+  printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, (CHAR *) (buf1) + align, c, len);
+
+  putchar ('\n');
+}
+
+int
+test_main (void)
+{
+  size_t i;
+  int c = 0;
+
+  test_init ();
+
+  printf ("%24s", "");
+  FOR_EACH_IMPL (impl, 0)
+    printf ("\t%s", impl->name);
+  putchar ('\n');
+
+#ifndef TEST_BZERO
+  for (c = -65; c <= 130; c += 65)
+#endif
+    {
+      for (i = 0; i < 18; ++i)
+	do_test (0, c, 1 << i);
+      for (i = 1; i < 32; ++i)
+	{
+	  do_test (i, c, i);
+	  if (i & (i - 1))
+	    do_test (0, c, i);
+	}
+      for (i = 32; i < 512; i+=32)
+	{
+	  do_test (0, c, i);
+	  do_test (i, c, i);
+	}
+      do_test (1, c, 14);
+      do_test (3, c, 1024);
+      do_test (4, c, 64);
+      do_test (2, c, 25);
+    }
+  for (i = 33; i <= 256; i += 4)
+    {
+      do_test (0, c, 32 * i);
+      do_test (i, c, 32 * i);
+    }
+
+  return ret;
+}
+
+#include <support/test-driver.c>