linux/lib/crc64.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Normal 64-bit CRC calculation.
5  * This is a basic crc64 implementation following ECMA-182 specification,
7  * https://www.ecma-international.org/publications/standards/Ecma-182.htm
10  * algorithm, here the CRC64 code is also inspired by the table-driven
15  * crc64table[256] is the lookup table of a table-driven 64-bit CRC
17  * time. The polynomial of crc64 arithmetic is from ECMA-182 specification
25  * crc64rocksoft[256] table is from the Rocksoft specification polynomial
45  * crc64_be - Calculate bitwise big-endian ECMA-182 CRC64
48  * @p: pointer to buffer over which CRC64 is run
49  * @len: length of buffer @p
51 u64 __pure crc64_be(u64 crc, const void *p, size_t len)  in crc64_be()  argument
55 	const unsigned char *_p = p;  in crc64_be()
67  * crc64_rocksoft_generic - Calculate bitwise Rocksoft CRC64
70  * @p: pointer to buffer over which CRC64 is run
71  * @len: length of buffer @p
73 u64 __pure crc64_rocksoft_generic(u64 crc, const void *p, size_t len)  in crc64_rocksoft_generic()  argument
75 	const unsigned char *_p = p;  in crc64_rocksoft_generic()