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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
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| Rev 298 |
Rev 384 |
/* Duff's device is legal C; test to make sure the compiler
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/* Duff's device is legal C; test to make sure the compiler
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doesn't complain about it.
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doesn't complain about it.
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Jason Thorpe <thorpej@wasabisystems.com>
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Jason Thorpe <thorpej@wasabisystems.com>
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Derived from the BSD Telnet Kerberos 4 checksum routine.
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Derived from the BSD Telnet Kerberos 4 checksum routine.
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See also PR 5230. */
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See also PR 5230. */
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/* { dg-do run } */
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/* { dg-do run } */
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/* { dg-options "-O2" } */
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/* { dg-options "-O2" } */
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extern void abort (void);
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extern void abort (void);
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extern void exit (int);
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extern void exit (int);
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#if __INT_MAX__ >= 2147483647
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#if __INT_MAX__ >= 2147483647
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/* At least 32-bit integers. */
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/* At least 32-bit integers. */
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typedef int type32;
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typedef int type32;
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#else
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#else
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typedef long type32;
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typedef long type32;
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#endif
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#endif
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type32
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type32
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cksum (const unsigned char *src, unsigned long size)
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cksum (const unsigned char *src, unsigned long size)
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{
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{
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type32 ck = 0;
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type32 ck = 0;
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switch (size & 3)
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switch (size & 3)
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{
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{
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while (size > 0)
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while (size > 0)
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{
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{
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case 0:
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case 0:
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ck ^= (type32)*src++ << 24;
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ck ^= (type32)*src++ << 24;
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--size;
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--size;
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case 3:
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case 3:
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ck ^= (type32)*src++ << 16;
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ck ^= (type32)*src++ << 16;
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--size;
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--size;
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case 2:
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case 2:
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ck ^= (type32)*src++ << 8;
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ck ^= (type32)*src++ << 8;
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--size;
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--size;
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case 1:
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case 1:
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ck ^= (type32)*src++;
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ck ^= (type32)*src++;
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--size;
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--size;
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}
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}
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}
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}
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return ck;
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return ck;
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}
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}
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const char testpat[] = "The quick brown fox jumped over the lazy dog.";
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const char testpat[] = "The quick brown fox jumped over the lazy dog.";
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int
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int
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main()
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main()
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{
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{
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type32 ck;
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type32 ck;
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ck = cksum ((const unsigned char *) testpat, sizeof (testpat));
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ck = cksum ((const unsigned char *) testpat, sizeof (testpat));
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if (ck != 925902908)
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if (ck != 925902908)
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abort ();
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abort ();
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exit (0);
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exit (0);
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}
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}
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