1 /**
2 * Copyright (c) 2020 HiSilicon (Shanghai) Technologies CO., LIMITED.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License. \n
14 *
15 * Description: Provides CRC-32 algrithm \n
16 */
17
18 #include "uapi_crc.h"
19 #include "common_def.h"
20
21
22 /* Table of CRC-32's of all single-byte values, IEEE 802.3 (0x04C11DB7) */
23 static const uint32_t g_unf_crc32_tab[] = {
24 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL,
25 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L,
26 0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L,
27 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L,
28 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
29 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L,
30 0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL,
31 0x14015c4fL, 0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L,
32 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L,
33 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
34 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L,
35 0x32d86ce3L, 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L,
36 0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L,
37 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, 0xb8bda50fL,
38 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
39 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL,
40 0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL,
41 0x71b18589L, 0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L,
42 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L,
43 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
44 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL,
45 0x6c0695edL, 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L,
46 0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL,
47 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L,
48 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
49 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL,
50 0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L,
51 0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L,
52 0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L,
53 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
54 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L,
55 0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL,
56 0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL,
57 0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L,
58 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
59 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L,
60 0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL,
61 0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L,
62 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL,
63 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
64 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L,
65 0xd1bb67f1L, 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL,
66 0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L,
67 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, 0x4669be79L,
68 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
69 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL,
70 0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L,
71 0xc2d7ffa7L, 0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL,
72 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL,
73 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
74 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L,
75 0x92d28e9bL, 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L,
76 0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL,
77 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, 0x18b74777L,
78 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
79 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L,
80 0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L,
81 0xa7672661L, 0xd06016f7L, 0x4969474dL, 0x3e6e77dbL,
82 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L,
83 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
84 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L,
85 0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL,
86 0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L,
87 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL,
88 };
89
90
uapi_crc32_no_comp(uint32_t crc_start,const uint8_t * buffer,uint32_t length)91 uint32_t uapi_crc32_no_comp(uint32_t crc_start, const uint8_t *buffer, uint32_t length)
92 {
93 uint32_t crc = crc_start;
94
95 if (buffer == NULL) {
96 return crc;
97 }
98
99 const uint32_t *tab = g_unf_crc32_tab;
100 const uint32_t *buf = (const uint32_t *)buffer;
101 uint32_t len = length;
102
103 /* Align it */
104 if (((((uintptr_t)buf) & 3) != 0) && (len > 0)) { /* 3: for align to 4 byte address. */
105 const uint8_t *p = (const uint8_t *)buf;
106 do {
107 crc = tab[(crc ^ (*p++)) & 0xFF] ^ (crc >> 8); /* Array size: 0xFF, bit size 8. */
108 } while ((--len > 0) && ((((uintptr_t)p) & 3) != 0)); /* 3: for align to 4 byte address. */
109 buf = (const uint32_t *)p;
110 }
111
112 uint32_t rem_len = len & 3;
113 len >>= 2; /* right shift 2 bit, lenght of uint8_t array to uint32_t array */
114 for (; len > 0; len--) {
115 /* load data 32 bits wide, xor data 32 bits wide. */
116 crc ^= *buf++; /* use pre increment for speed */
117 crc = tab[(crc ^ (0)) & 0xFF] ^ (crc >> 8); /* Array size: 0xFF, bit size 8. */
118 crc = tab[(crc ^ (0)) & 0xFF] ^ (crc >> 8); /* Array size: 0xFF, bit size 8. */
119 crc = tab[(crc ^ (0)) & 0xFF] ^ (crc >> 8); /* Array size: 0xFF, bit size 8. */
120 crc = tab[(crc ^ (0)) & 0xFF] ^ (crc >> 8); /* Array size: 0xFF, bit size 8. */
121 }
122
123 /* Process the last few bytes */
124 if (rem_len > 0) {
125 const uint8_t *p = (const uint8_t *)buf;
126 do {
127 crc = tab[(crc ^ (*p++)) & 0xFF] ^ (crc >> 8); /* Array size: 0xFF, bit size 8. */
128 } while (--rem_len > 0);
129 }
130
131 return crc;
132 }
133
uapi_crc32(uint32_t crc_start,const uint8_t * buffer,uint32_t length)134 uint32_t uapi_crc32(uint32_t crc_start, const uint8_t *buffer, uint32_t length)
135 {
136 return uapi_crc32_no_comp(crc_start ^ 0xFFFFFFFFL, buffer, length) ^ 0xFFFFFFFFL;
137 }
138
crc32(uint32_t crc_start,const uint8_t * buffer,uint32_t length)139 uint32_t crc32(uint32_t crc_start, const uint8_t *buffer, uint32_t length)
140 {
141 return uapi_crc32_no_comp(crc_start ^ 0xFFFFFFFFL, buffer, length) ^ 0xFFFFFFFFL;
142 }
143