From 2ebe92556bdc4daf0761fc36801daddfd447126e Mon Sep 17 00:00:00 2001
From: Marcus Shawcroft <marcus.shawcroft@linaro.org>
Date: Fri, 4 Jan 2013 17:01:47 +0000
Subject: [PATCH 1/6] Adding test-memmove.c

---
 Makefile.am          |    3 +
 tests/test-memmove.c |  316 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 319 insertions(+)
 create mode 100644 tests/test-memmove.c

diff --git a/Makefile.am b/Makefile.am
index 9f85088..8195223 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -37,6 +37,7 @@ lib_LTLIBRARIES = \
 check_PROGRAMS = \
 	tests/test-memchr \
 	tests/test-memcpy \
+	tests/test-memmove \
 	tests/test-memset \
 	tests/test-strchr \
 	tests/test-strcmp \
@@ -50,6 +51,8 @@ tests_test_memchr_LDADD = $(tests_ldadd)
 tests_test_memchr_CFLAGS = $(tests_cflags)
 tests_test_memcpy_LDADD = $(tests_ldadd)
 tests_test_memcpy_CFLAGS = $(tests_cflags)
+tests_test_memmove_LDADD = $(tests_ldadd)
+tests_test_memmove_CFLAGS = $(tests_cflags)
 tests_test_memset_LDADD = $(tests_ldadd)
 tests_test_memset_CFLAGS = $(tests_cflags)
 tests_test_strchr_LDADD = $(tests_ldadd)
diff --git a/tests/test-memmove.c b/tests/test-memmove.c
new file mode 100644
index 0000000..4bfc28a
--- /dev/null
+++ b/tests/test-memmove.c
@@ -0,0 +1,316 @@
+/* Test and measure memmove functions.
+   Copyright (C) 1999-2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Jakub Jelinek <jakub@redhat.com>, 1999.
+
+   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_BCOPY
+# define TEST_NAME "bcopy"
+#else
+# define TEST_NAME "memmove"
+#endif
+#include "test-string.h"
+
+char *simple_memmove (char *, const char *, size_t);
+
+#ifdef TEST_BCOPY
+typedef void (*proto_t) (const char *, char *, size_t);
+void simple_bcopy (const char *, char *, size_t);
+
+IMPL (simple_bcopy, 0)
+IMPL (bcopy, 1)
+
+void
+simple_bcopy (const char *src, char *dst, size_t n)
+{
+  simple_memmove (dst, src, n);
+}
+#else
+typedef char *(*proto_t) (char *, const char *, size_t);
+
+IMPL (simple_memmove, 0)
+IMPL (memmove, 1)
+#endif
+
+char *
+simple_memmove (char *dst, const char *src, size_t n)
+{
+  char *ret = dst;
+  if (src < dst)
+    {
+      dst += n;
+      src += n;
+      while (n--)
+	*--dst = *--src;
+    }
+  else
+    while (n--)
+      *dst++ = *src++;
+  return ret;
+}
+
+static void
+do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
+	     size_t len)
+{
+  memcpy (src, orig_src, len);
+#ifdef TEST_BCOPY
+  CALL (impl, src, dst, len);
+#else
+  char *res;
+
+  res = CALL (impl, dst, src, len);
+  if (res != dst)
+    {
+      error (0, 0, "Wrong result in function %s %p %p", impl->name,
+	     res, dst);
+      ret = 1;
+      return;
+    }
+#endif
+
+  if (memcmp (dst, orig_src, len) != 0)
+    {
+      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
+	     impl->name, dst, src);
+      ret = 1;
+      return;
+    }
+
+  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);
+#ifdef TEST_BCOPY
+	  CALL (impl, src, dst, len);
+#else
+	  CALL (impl, dst, src, len);
+#endif
+	  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 len)
+{
+  size_t i, j;
+  char *s1, *s2;
+
+  align1 &= 63;
+  if (align1 + len >= page_size)
+    return;
+
+  align2 &= 63;
+  if (align2 + len >= page_size)
+    return;
+
+  s1 = (char *) (buf1 + align1);
+  s2 = (char *) (buf2 + align2);
+
+  for (i = 0, j = 1; i < len; i++, j += 23)
+    s1[i] = j;
+
+  if (HP_TIMING_AVAIL)
+    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
+
+  if (HP_TIMING_AVAIL)
+    putchar ('\n');
+}
+
+static void
+do_random_tests (void)
+{
+  size_t i, n, align1, align2, len, size;
+  size_t srcstart, srcend, dststart, dstend;
+  int c;
+  unsigned char *p1, *p2;
+#ifndef TEST_BCOPY
+  unsigned char *res;
+#endif
+
+  for (n = 0; n < ITERATIONS; n++)
+    {
+      if ((random () & 255) == 0)
+	size = 65536;
+      else
+	size = 512;
+      if (size > page_size)
+	size = page_size;
+      if ((random () & 3) == 0)
+	{
+	  len = random () & (size - 1);
+	  align1 = size - len - (random () & 31);
+	  align2 = size - len - (random () & 31);
+	  if (align1 > size)
+	    align1 = 0;
+	  if (align2 > size)
+	    align2 = 0;
+	}
+      else
+	{
+	  align1 = random () & (size / 2 - 1);
+	  align2 = random () & (size / 2 - 1);
+	  len = random () & (size - 1);
+	  if (align1 + len > size)
+	    align1 = size - len;
+	  if (align2 + len > size)
+	    align2 = size - len;
+	}
+
+      p1 = buf1 + page_size - size;
+      p2 = buf2 + page_size - size;
+      c = random () & 255;
+      srcend = align1 + len + 256;
+      if (srcend > size)
+	srcend = size;
+      if (align1 > 256)
+	srcstart = align1 - 256;
+      else
+	srcstart = 0;
+      for (i = srcstart; i < srcend; ++i)
+	p1[i] = random () & 255;
+      dstend = align2 + len + 256;
+      if (dstend > size)
+	dstend = size;
+      if (align2 > 256)
+	dststart = align2 - 256;
+      else
+	dststart = 0;
+
+      FOR_EACH_IMPL (impl, 1)
+	{
+	  memset (p2 + dststart, c, dstend - dststart);
+	  memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
+#ifdef TEST_BCOPY
+	  CALL (impl, (char *) (p2 + align1), (char *) (p2 + align2), len);
+#else
+	  res = (unsigned char *) CALL (impl,
+					(char *) (p2 + align2),
+					(char *) (p2 + align1), len);
+	  if (res != p2 + align2)
+	    {
+	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
+		     n, impl->name, align1, align2, len, res, p2 + align2);
+	      ret = 1;
+	    }
+#endif
+	  if (memcmp (p1 + align1, p2 + align2, len))
+	    {
+	      error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
+		     n, impl->name, align1, align2, len);
+	      ret = 1;
+	    }
+	  for (i = dststart; i < dstend; ++i)
+	    {
+	      if (i >= align2 && i < align2 + len)
+		{
+		  i = align2 + len - 1;
+		  continue;
+		}
+	      if (i >= srcstart && i < srcend)
+		{
+		  i = srcend - 1;
+		  continue;
+		}
+	      if (p2[i] != c)
+		{
+		  error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
+			 n, impl->name, align1, align2, len);
+		  ret = 1;
+		  break;
+		}
+	    }
+
+	  if (srcstart < align2
+	      && memcmp (p2 + srcstart, p1 + srcstart,
+			 (srcend > align2 ? align2 : srcend) - srcstart))
+	    {
+	      error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
+		     n, impl->name, align1, align2, len);
+	      ret = 1;
+	      break;
+	    }
+
+	  i = srcstart > align2 + len ? srcstart : align2 + len;
+	  if (srcend > align2 + len
+	      && memcmp (p2 + i, p1 + i, srcend - i))
+	    {
+	      error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
+		     n, impl->name, align1, align2, len);
+	      ret = 1;
+	      break;
+	    }
+	}
+    }
+}
+
+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 = 0; i < 14; ++i)
+    {
+      do_test (0, 32, 1 << i);
+      do_test (32, 0, 1 << i);
+      do_test (0, i, 1 << i);
+      do_test (i, 0, 1 << i);
+    }
+
+  for (i = 0; i < 32; ++i)
+    {
+      do_test (0, 32, i);
+      do_test (32, 0, i);
+      do_test (0, i, i);
+      do_test (i, 0, i);
+    }
+
+  for (i = 3; i < 32; ++i)
+    {
+      if ((i & (i - 1)) == 0)
+	continue;
+      do_test (0, 32, 16 * i);
+      do_test (32, 0, 16 * i);
+      do_test (0, i, 16 * i);
+      do_test (i, 0, 16 * i);
+    }
+
+  do_random_tests ();
+  return ret;
+}
+
+#include "test-skeleton.c"
-- 
1.7.9.5

