include/linux/crc32poly.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _LINUX_CRC32_POLY_H
0003 #define _LINUX_CRC32_POLY_H
0004
0005 /*
0006  * There are multiple 16-bit CRC polynomials in common use, but this is
0007  * *the* standard CRC-32 polynomial, first popularized by Ethernet.
0008  * x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0
0009  */
0010 #define CRC32_POLY_LE 0xedb88320
0011 #define CRC32_POLY_BE 0x04c11db7
0012
0013 /*
0014  * This is the CRC32c polynomial, as outlined by Castagnoli.
0015  * x^32+x^28+x^27+x^26+x^25+x^23+x^22+x^20+x^19+x^18+x^14+x^13+x^11+x^10+x^9+
0016  * x^8+x^6+x^0
0017  */
0018 #define CRC32C_POLY_LE 0x82F63B78
0019
0020 #endif /* _LINUX_CRC32_POLY_H */