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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - lib/crc32defs.h
2 * There are multiple 16-bit CRC polynomials in common use, but this is
3 * *the* standard CRC-32 polynomial, first popularized by Ethernet.
4 * 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
6 #define CRCPOLY_LE 0xedb88320
7 #define CRCPOLY_BE 0x04c11db7
9 /* How many bits at a time to use. Requires a table of 4<<CRC_xx_BITS bytes. */
10 /* For less performance-sensitive, use 4 */
12 # define CRC_LE_BITS 8
15 # define CRC_BE_BITS 8
19 * Little-endian CRC computation. Used with serial bit streams sent
20 * lsbit-first. Be sure to use cpu_to_le32() to append the computed CRC.
22 #if CRC_LE_BITS > 8 || CRC_LE_BITS < 1 || CRC_LE_BITS & CRC_LE_BITS-1
23 # error CRC_LE_BITS must be a power of 2 between 1 and 8
27 * Big-endian CRC computation. Used with serial bit streams sent
28 * msbit-first. Be sure to use cpu_to_be32() to append the computed CRC.
30 #if CRC_BE_BITS > 8 || CRC_BE_BITS < 1 || CRC_BE_BITS & CRC_BE_BITS-1
31 # error CRC_BE_BITS must be a power of 2 between 1 and 8