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-rw-r--r--REORG.TODO/string/test-memmove.c290
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diff --git a/REORG.TODO/string/test-memmove.c b/REORG.TODO/string/test-memmove.c
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+/* Test and measure memmove functions.
+ Copyright (C) 1999-2017 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 *
+inhibit_loop_to_libcall
+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)
+{
+ /* This also clears the destination buffer set by the previous run. */
+ 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;
+ }
+}
+
+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;
+
+ FOR_EACH_IMPL (impl, 0)
+ do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
+}
+
+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 <support/test-driver.c>
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