2N/A * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 2N/A * Use is subject to license terms. 2N/A#
pragma ident "%Z%%M% %I% %E% SMI" 2N/A * Copyright 1990, 2002 by the Massachusetts Institute of Technology. 2N/A * All Rights Reserved. 2N/A * Export of this software from the United States of America may 2N/A * require a specific license from the United States Government. 2N/A * It is the responsibility of any person or organization contemplating 2N/A * export to obtain such a license before exporting. 2N/A * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 2N/A * distribute this software and its documentation for any purpose and 2N/A * without fee is hereby granted, provided that the above copyright 2N/A * notice appear in all copies and that both that copyright notice and 2N/A * this permission notice appear in supporting documentation, and that 2N/A * the name of M.I.T. not be used in advertising or publicity pertaining 2N/A * to distribution of the software without specific, written prior 2N/A * permission. M.I.T. makes no representations about the suitability of 2N/A * this software for any purpose. It is provided "as is" without express 2N/A * or implied warranty. 2N/A/* This table and block of comments are taken from code labeled: */ 2N/A * Copyright (C) 1986 Gary S. Brown. You may use this program, or 2N/A * code or tables extracted from it, as desired without restriction. 2N/A/* First, the polynomial itself and its table of feedback terms. The */ 2N/A/* 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 */ 2N/A/* Note that we take it "backwards" and put the highest-order term in */ 2N/A/* the lowest-order bit. The X^32 term is "implied"; the LSB is the */ 2N/A/* X^31 term, etc. The X^0 term (usually shown as "+1") results in */ 2N/A/* the MSB being 1. */ 2N/A/* Note that the usual hardware shift register implementation, which */ 2N/A/* is what we're using (we're merely optimizing it by doing eight-bit */ 2N/A/* chunks at a time) shifts bits into the lowest-order term. In our */ 2N/A/* implementation, that means shifting towards the right. Why do we */ 2N/A/* do it this way? Because the calculated CRC must be transmitted in */ 2N/A/* order from highest-order term to lowest-order term. UARTs transmit */ 2N/A/* characters in order from LSB to MSB. By storing the CRC this way, */ 2N/A/* we hand it to the UART in the order low-byte to high-byte; the UART */ 2N/A/* sends each low-bit to hight-bit; and the result is transmission bit */ 2N/A/* by bit from highest- to lowest-order term without requiring any bit */ 2N/A/* shuffling on our part. Reception works similarly. */ 2N/A/* The feedback terms table consists of 256, 32-bit entries. Notes: */ 2N/A/* 1. The table can be generated at runtime if desired; code to do so */ 2N/A/* is shown later. It might not be obvious, but the feedback */ 2N/A/* terms simply represent the results of eight shift/xor opera- */ 2N/A/* tions for all combinations of data and CRC register values. */ 2N/A/* 2. The CRC accumulation logic is the same for all CRC polynomials, */ 2N/A/* be they sixteen or thirty-two bits wide. You simply choose the */ 2N/A/* appropriate table. Alternatively, because the table can be */ 2N/A/* generated at runtime, you can start by generating the table for */ 2N/A/* the polynomial in question and use exactly the same "updcrc", */ 2N/A/* if your application needn't simultaneously handle two CRC */ 2N/A/* polynomials. (Note, however, that XMODEM is strange.) */ 2N/A/* 3. For 16-bit CRCs, the table entries need be only 16 bits wide; */ 2N/A/* of course, 32-bit entries work OK if the high 16 bits are zero. */ 2N/A/* 4. The values must be right-shifted by eight bits by the "updcrc" */ 2N/A/* logic; the shift must be unsigned (bring in zeroes). On some */ 2N/A/* hardware you could probably optimize the shift in assembler by */ 2N/A/* using byte-swap instructions. */ 2N/A 0x00000000,
0x77073096,
0xee0e612c,
0x990951ba,
2N/A 0x076dc419,
0x706af48f,
0xe963a535,
0x9e6495a3,
2N/A 0x0edb8832,
0x79dcb8a4,
0xe0d5e91e,
0x97d2d988,
2N/A 0x09b64c2b,
0x7eb17cbd,
0xe7b82d07,
0x90bf1d91,
2N/A 0x1db71064,
0x6ab020f2,
0xf3b97148,
0x84be41de,
2N/A 0x1adad47d,
0x6ddde4eb,
0xf4d4b551,
0x83d385c7,
2N/A 0x136c9856,
0x646ba8c0,
0xfd62f97a,
0x8a65c9ec,
2N/A 0x14015c4f,
0x63066cd9,
0xfa0f3d63,
0x8d080df5,
2N/A 0x3b6e20c8,
0x4c69105e,
0xd56041e4,
0xa2677172,
2N/A 0x3c03e4d1,
0x4b04d447,
0xd20d85fd,
0xa50ab56b,
2N/A 0x35b5a8fa,
0x42b2986c,
0xdbbbc9d6,
0xacbcf940,
2N/A 0x32d86ce3,
0x45df5c75,
0xdcd60dcf,
0xabd13d59,
2N/A 0x26d930ac,
0x51de003a,
0xc8d75180,
0xbfd06116,
2N/A 0x21b4f4b5,
0x56b3c423,
0xcfba9599,
0xb8bda50f,
2N/A 0x2802b89e,
0x5f058808,
0xc60cd9b2,
0xb10be924,
2N/A 0x2f6f7c87,
0x58684c11,
0xc1611dab,
0xb6662d3d,
2N/A 0x76dc4190,
0x01db7106,
0x98d220bc,
0xefd5102a,
2N/A 0x71b18589,
0x06b6b51f,
0x9fbfe4a5,
0xe8b8d433,
2N/A 0x7807c9a2,
0x0f00f934,
0x9609a88e,
0xe10e9818,
2N/A 0x7f6a0dbb,
0x086d3d2d,
0x91646c97,
0xe6635c01,
2N/A 0x6b6b51f4,
0x1c6c6162,
0x856530d8,
0xf262004e,
2N/A 0x6c0695ed,
0x1b01a57b,
0x8208f4c1,
0xf50fc457,
2N/A 0x65b0d9c6,
0x12b7e950,
0x8bbeb8ea,
0xfcb9887c,
2N/A 0x62dd1ddf,
0x15da2d49,
0x8cd37cf3,
0xfbd44c65,
2N/A 0x4db26158,
0x3ab551ce,
0xa3bc0074,
0xd4bb30e2,
2N/A 0x4adfa541,
0x3dd895d7,
0xa4d1c46d,
0xd3d6f4fb,
2N/A 0x4369e96a,
0x346ed9fc,
0xad678846,
0xda60b8d0,
2N/A 0x44042d73,
0x33031de5,
0xaa0a4c5f,
0xdd0d7cc9,
2N/A 0x5005713c,
0x270241aa,
0xbe0b1010,
0xc90c2086,
2N/A 0x5768b525,
0x206f85b3,
0xb966d409,
0xce61e49f,
2N/A 0x5edef90e,
0x29d9c998,
0xb0d09822,
0xc7d7a8b4,
2N/A 0x59b33d17,
0x2eb40d81,
0xb7bd5c3b,
0xc0ba6cad,
2N/A 0xedb88320,
0x9abfb3b6,
0x03b6e20c,
0x74b1d29a,
2N/A 0xead54739,
0x9dd277af,
0x04db2615,
0x73dc1683,
2N/A 0xe3630b12,
0x94643b84,
0x0d6d6a3e,
0x7a6a5aa8,
2N/A 0xe40ecf0b,
0x9309ff9d,
0x0a00ae27,
0x7d079eb1,
2N/A 0xf00f9344,
0x8708a3d2,
0x1e01f268,
0x6906c2fe,
2N/A 0xf762575d,
0x806567cb,
0x196c3671,
0x6e6b06e7,
2N/A 0xfed41b76,
0x89d32be0,
0x10da7a5a,
0x67dd4acc,
2N/A 0xf9b9df6f,
0x8ebeeff9,
0x17b7be43,
0x60b08ed5,
2N/A 0xd6d6a3e8,
0xa1d1937e,
0x38d8c2c4,
0x4fdff252,
2N/A 0xd1bb67f1,
0xa6bc5767,
0x3fb506dd,
0x48b2364b,
2N/A 0xd80d2bda,
0xaf0a1b4c,
0x36034af6,
0x41047a60,
2N/A 0xdf60efc3,
0xa867df55,
0x316e8eef,
0x4669be79,
2N/A 0xcb61b38c,
0xbc66831a,
0x256fd2a0,
0x5268e236,
2N/A 0xcc0c7795,
0xbb0b4703,
0x220216b9,
0x5505262f,
2N/A 0xc5ba3bbe,
0xb2bd0b28,
0x2bb45a92,
0x5cb36a04,
2N/A 0xc2d7ffa7,
0xb5d0cf31,
0x2cd99e8b,
0x5bdeae1d,
2N/A 0x9b64c2b0,
0xec63f226,
0x756aa39c,
0x026d930a,
2N/A 0x9c0906a9,
0xeb0e363f,
0x72076785,
0x05005713,
2N/A 0x95bf4a82,
0xe2b87a14,
0x7bb12bae,
0x0cb61b38,
2N/A 0x92d28e9b,
0xe5d5be0d,
0x7cdcefb7,
0x0bdbdf21,
2N/A 0x86d3d2d4,
0xf1d4e242,
0x68ddb3f8,
0x1fda836e,
2N/A 0x81be16cd,
0xf6b9265b,
0x6fb077e1,
0x18b74777,
2N/A 0x88085ae6,
0xff0f6a70,
0x66063bca,
0x11010b5c,
2N/A 0x8f659eff,
0xf862ae69,
0x616bffd3,
0x166ccf45,
2N/A 0xa00ae278,
0xd70dd2ee,
0x4e048354,
0x3903b3c2,
2N/A 0xa7672661,
0xd06016f7,
0x4969474d,
0x3e6e77db,
2N/A 0xaed16a4a,
0xd9d65adc,
0x40df0b66,
0x37d83bf0,
2N/A 0xa9bcae53,
0xdebb9ec5,
0x47b2cf7f,
0x30b5ffe9,
2N/A 0xbdbdf21c,
0xcabac28a,
0x53b39330,
0x24b4a3a6,
2N/A 0xbad03605,
0xcdd70693,
0x54de5729,
0x23d967bf,
2N/A 0xb3667a2e,
0xc4614ab8,
0x5d681b02,
0x2a6f2b94,
2N/A 0xb40bbe37,
0xc30c8ea1,
0x5a05df1b,
0x2d02ef8d 2N/A/* Windows needs to these prototypes for crc32_cksumtable_entry below */ 2N/A /* c now holds the result */