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1#include <stdio.h>
2#include "../include/generated/autoconf.h"
3#include "crc32defs.h"
4#include <inttypes.h>
5
6#define ENTRIES_PER_LINE 4
7
8#if CRC_LE_BITS > 8
9# define LE_TABLE_ROWS (CRC_LE_BITS/8)
10# define LE_TABLE_SIZE 256
11#else
12# define LE_TABLE_ROWS 1
13# define LE_TABLE_SIZE (1 << CRC_LE_BITS)
14#endif
15
16#if CRC_BE_BITS > 8
17# define BE_TABLE_ROWS (CRC_BE_BITS/8)
18# define BE_TABLE_SIZE 256
19#else
20# define BE_TABLE_ROWS 1
21# define BE_TABLE_SIZE (1 << CRC_BE_BITS)
22#endif
23
24static uint32_t crc32table_le[LE_TABLE_ROWS][256];
25static uint32_t crc32table_be[BE_TABLE_ROWS][256];
26static uint32_t crc32ctable_le[LE_TABLE_ROWS][256];
27
28/**
29 * crc32init_le() - allocate and initialize LE table data
30 *
31 * crc is the crc of the byte i; other entries are filled in based on the
32 * fact that crctable[i^j] = crctable[i] ^ crctable[j].
33 *
34 */
35static void crc32init_le_generic(const uint32_t polynomial,
36 uint32_t (*tab)[256])
37{
38 unsigned i, j;
39 uint32_t crc = 1;
40
41 tab[0][0] = 0;
42
43 for (i = LE_TABLE_SIZE >> 1; i; i >>= 1) {
44 crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0);
45 for (j = 0; j < LE_TABLE_SIZE; j += 2 * i)
46 tab[0][i + j] = crc ^ tab[0][j];
47 }
48 for (i = 0; i < LE_TABLE_SIZE; i++) {
49 crc = tab[0][i];
50 for (j = 1; j < LE_TABLE_ROWS; j++) {
51 crc = tab[0][crc & 0xff] ^ (crc >> 8);
52 tab[j][i] = crc;
53 }
54 }
55}
56
57static void crc32init_le(void)
58{
59 crc32init_le_generic(CRCPOLY_LE, crc32table_le);
60}
61
62static void crc32cinit_le(void)
63{
64 crc32init_le_generic(CRC32C_POLY_LE, crc32ctable_le);
65}
66
67/**
68 * crc32init_be() - allocate and initialize BE table data
69 */
70static void crc32init_be(void)
71{
72 unsigned i, j;
73 uint32_t crc = 0x80000000;
74
75 crc32table_be[0][0] = 0;
76
77 for (i = 1; i < BE_TABLE_SIZE; i <<= 1) {
78 crc = (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : 0);
79 for (j = 0; j < i; j++)
80 crc32table_be[0][i + j] = crc ^ crc32table_be[0][j];
81 }
82 for (i = 0; i < BE_TABLE_SIZE; i++) {
83 crc = crc32table_be[0][i];
84 for (j = 1; j < BE_TABLE_ROWS; j++) {
85 crc = crc32table_be[0][(crc >> 24) & 0xff] ^ (crc << 8);
86 crc32table_be[j][i] = crc;
87 }
88 }
89}
90
91static void output_table(uint32_t (*table)[256], int rows, int len, char *trans)
92{
93 int i, j;
94
95 for (j = 0 ; j < rows; j++) {
96 printf("{");
97 for (i = 0; i < len - 1; i++) {
98 if (i % ENTRIES_PER_LINE == 0)
99 printf("\n");
100 printf("%s(0x%8.8xL), ", trans, table[j][i]);
101 }
102 printf("%s(0x%8.8xL)},\n", trans, table[j][len - 1]);
103 }
104}
105
106int main(int argc, char** argv)
107{
108 printf("/* this file is generated - do not edit */\n\n");
109
110 if (CRC_LE_BITS > 1) {
111 crc32init_le();
112 printf("static u32 __cacheline_aligned "
113 "crc32table_le[%d][%d] = {",
114 LE_TABLE_ROWS, LE_TABLE_SIZE);
115 output_table(crc32table_le, LE_TABLE_ROWS,
116 LE_TABLE_SIZE, "tole");
117 printf("};\n");
118 }
119
120 if (CRC_BE_BITS > 1) {
121 crc32init_be();
122 printf("static u32 __cacheline_aligned "
123 "crc32table_be[%d][%d] = {",
124 BE_TABLE_ROWS, BE_TABLE_SIZE);
125 output_table(crc32table_be, LE_TABLE_ROWS,
126 BE_TABLE_SIZE, "tobe");
127 printf("};\n");
128 }
129 if (CRC_LE_BITS > 1) {
130 crc32cinit_le();
131 printf("static u32 __cacheline_aligned "
132 "crc32ctable_le[%d][%d] = {",
133 LE_TABLE_ROWS, LE_TABLE_SIZE);
134 output_table(crc32ctable_le, LE_TABLE_ROWS,
135 LE_TABLE_SIZE, "tole");
136 printf("};\n");
137 }
138
139 return 0;
140}
1#include <stdio.h>
2#include "crc32defs.h"
3#include <inttypes.h>
4
5#define ENTRIES_PER_LINE 4
6
7#define LE_TABLE_SIZE (1 << CRC_LE_BITS)
8#define BE_TABLE_SIZE (1 << CRC_BE_BITS)
9
10static uint32_t crc32table_le[4][LE_TABLE_SIZE];
11static uint32_t crc32table_be[4][BE_TABLE_SIZE];
12
13/**
14 * crc32init_le() - allocate and initialize LE table data
15 *
16 * crc is the crc of the byte i; other entries are filled in based on the
17 * fact that crctable[i^j] = crctable[i] ^ crctable[j].
18 *
19 */
20static void crc32init_le(void)
21{
22 unsigned i, j;
23 uint32_t crc = 1;
24
25 crc32table_le[0][0] = 0;
26
27 for (i = 1 << (CRC_LE_BITS - 1); i; i >>= 1) {
28 crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
29 for (j = 0; j < LE_TABLE_SIZE; j += 2 * i)
30 crc32table_le[0][i + j] = crc ^ crc32table_le[0][j];
31 }
32 for (i = 0; i < LE_TABLE_SIZE; i++) {
33 crc = crc32table_le[0][i];
34 for (j = 1; j < 4; j++) {
35 crc = crc32table_le[0][crc & 0xff] ^ (crc >> 8);
36 crc32table_le[j][i] = crc;
37 }
38 }
39}
40
41/**
42 * crc32init_be() - allocate and initialize BE table data
43 */
44static void crc32init_be(void)
45{
46 unsigned i, j;
47 uint32_t crc = 0x80000000;
48
49 crc32table_be[0][0] = 0;
50
51 for (i = 1; i < BE_TABLE_SIZE; i <<= 1) {
52 crc = (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : 0);
53 for (j = 0; j < i; j++)
54 crc32table_be[0][i + j] = crc ^ crc32table_be[0][j];
55 }
56 for (i = 0; i < BE_TABLE_SIZE; i++) {
57 crc = crc32table_be[0][i];
58 for (j = 1; j < 4; j++) {
59 crc = crc32table_be[0][(crc >> 24) & 0xff] ^ (crc << 8);
60 crc32table_be[j][i] = crc;
61 }
62 }
63}
64
65static void output_table(uint32_t table[4][256], int len, char *trans)
66{
67 int i, j;
68
69 for (j = 0 ; j < 4; j++) {
70 printf("{");
71 for (i = 0; i < len - 1; i++) {
72 if (i % ENTRIES_PER_LINE == 0)
73 printf("\n");
74 printf("%s(0x%8.8xL), ", trans, table[j][i]);
75 }
76 printf("%s(0x%8.8xL)},\n", trans, table[j][len - 1]);
77 }
78}
79
80int main(int argc, char** argv)
81{
82 printf("/* this file is generated - do not edit */\n\n");
83
84 if (CRC_LE_BITS > 1) {
85 crc32init_le();
86 printf("static const u32 crc32table_le[4][256] = {");
87 output_table(crc32table_le, LE_TABLE_SIZE, "tole");
88 printf("};\n");
89 }
90
91 if (CRC_BE_BITS > 1) {
92 crc32init_be();
93 printf("static const u32 crc32table_be[4][256] = {");
94 output_table(crc32table_be, BE_TABLE_SIZE, "tobe");
95 printf("};\n");
96 }
97
98 return 0;
99}