1 /* Copyright (C) 2002 Free Software Foundation.
3 Test memcpy with various combinations of pointer alignments and lengths to
4 make sure any optimizations in the library are correct.
6 Written by Michael Meissner, March 9, 2002. */
11 #define MAX_OFFSET (sizeof (long long))
15 #define MAX_COPY (10 * sizeof (long long))
19 #define MAX_EXTRA (sizeof (long long))
22 #define MAX_LENGTH (MAX_OFFSET + MAX_COPY + MAX_EXTRA)
25 /* Use a sequence length that is not divisible by two, to make it more
26 likely to detect when words are mixed up. */
27 #define SEQUENCE_LENGTH 31
37 int off1, off2, len, i;
40 for (off1 = 0; off1 < MAX_OFFSET; off1++)
41 for (off2 = 0; off2 < MAX_OFFSET; off2++)
42 for (len = 1; len < MAX_COPY; len++)
44 for (i = 0, c = 'A'; i < MAX_LENGTH; i++, c++)
47 if (c >= 'A' + SEQUENCE_LENGTH)
52 p = memcpy (u1.buf + off1, u2.buf + off2, len);
53 if (p != u1.buf + off1)
57 for (i = 0; i < off1; i++, q++)
61 for (i = 0, c = 'A' + off2; i < len; i++, q++, c++)
63 if (c >= 'A' + SEQUENCE_LENGTH)
69 for (i = 0; i < MAX_EXTRA; i++, q++)