1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * CRC constants generated by:
4 *
5 * ./scripts/gen-crc-consts.py riscv_clmul crc16_msb_0x8bb7,crc32_msb_0x04c11db7,crc32_lsb_0xedb88320,crc32_lsb_0x82f63b78,crc64_msb_0x42f0e1eba9ea3693,crc64_lsb_0x9a6c9329ac4bc9b5
6 *
7 * Do not edit manually.
8 */
9
10struct crc_clmul_consts {
11 unsigned long fold_across_2_longs_const_hi;
12 unsigned long fold_across_2_longs_const_lo;
13 unsigned long barrett_reduction_const_1;
14 unsigned long barrett_reduction_const_2;
15};
16
17/*
18 * Constants generated for most-significant-bit-first CRC-16 using
19 * G(x) = x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + x^0
20 */
21static const struct crc_clmul_consts crc16_msb_0x8bb7_consts __maybe_unused = {
22#ifdef CONFIG_64BIT
23 .fold_across_2_longs_const_hi = 0x0000000000001faa, /* x^192 mod G */
24 .fold_across_2_longs_const_lo = 0x000000000000a010, /* x^128 mod G */
25 .barrett_reduction_const_1 = 0xfb2d2bfc0e99d245, /* floor(x^79 / G) */
26 .barrett_reduction_const_2 = 0x0000000000008bb7, /* G - x^16 */
27#else
28 .fold_across_2_longs_const_hi = 0x00005890, /* x^96 mod G */
29 .fold_across_2_longs_const_lo = 0x0000f249, /* x^64 mod G */
30 .barrett_reduction_const_1 = 0xfb2d2bfc, /* floor(x^47 / G) */
31 .barrett_reduction_const_2 = 0x00008bb7, /* G - x^16 */
32#endif
33};
34
35/*
36 * Constants generated for most-significant-bit-first CRC-32 using
37 * G(x) = x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 + x^7 +
38 * x^5 + x^4 + x^2 + x^1 + x^0
39 */
40static const struct crc_clmul_consts crc32_msb_0x04c11db7_consts __maybe_unused = {
41#ifdef CONFIG_64BIT
42 .fold_across_2_longs_const_hi = 0x00000000c5b9cd4c, /* x^192 mod G */
43 .fold_across_2_longs_const_lo = 0x00000000e8a45605, /* x^128 mod G */
44 .barrett_reduction_const_1 = 0x826880efa40da72d, /* floor(x^95 / G) */
45 .barrett_reduction_const_2 = 0x0000000004c11db7, /* G - x^32 */
46#else
47 .fold_across_2_longs_const_hi = 0xf200aa66, /* x^96 mod G */
48 .fold_across_2_longs_const_lo = 0x490d678d, /* x^64 mod G */
49 .barrett_reduction_const_1 = 0x826880ef, /* floor(x^63 / G) */
50 .barrett_reduction_const_2 = 0x04c11db7, /* G - x^32 */
51#endif
52};
53
54/*
55 * Constants generated for least-significant-bit-first CRC-32 using
56 * G(x) = x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 + x^7 +
57 * x^5 + x^4 + x^2 + x^1 + x^0
58 */
59static const struct crc_clmul_consts crc32_lsb_0xedb88320_consts __maybe_unused = {
60#ifdef CONFIG_64BIT
61 .fold_across_2_longs_const_hi = 0x65673b4600000000, /* x^191 mod G */
62 .fold_across_2_longs_const_lo = 0x9ba54c6f00000000, /* x^127 mod G */
63 .barrett_reduction_const_1 = 0xb4e5b025f7011641, /* floor(x^95 / G) */
64 .barrett_reduction_const_2 = 0x00000000edb88320, /* (G - x^32) * x^32 */
65#else
66 .fold_across_2_longs_const_hi = 0xccaa009e, /* x^95 mod G */
67 .fold_across_2_longs_const_lo = 0xb8bc6765, /* x^63 mod G */
68 .barrett_reduction_const_1 = 0xf7011641, /* floor(x^63 / G) */
69 .barrett_reduction_const_2 = 0xedb88320, /* (G - x^32) * x^0 */
70#endif
71};
72
73/*
74 * Constants generated for least-significant-bit-first CRC-32 using
75 * G(x) = x^32 + x^28 + x^27 + x^26 + x^25 + x^23 + x^22 + x^20 + x^19 + x^18 +
76 * x^14 + x^13 + x^11 + x^10 + x^9 + x^8 + x^6 + x^0
77 */
78static const struct crc_clmul_consts crc32_lsb_0x82f63b78_consts __maybe_unused = {
79#ifdef CONFIG_64BIT
80 .fold_across_2_longs_const_hi = 0x3743f7bd00000000, /* x^191 mod G */
81 .fold_across_2_longs_const_lo = 0x3171d43000000000, /* x^127 mod G */
82 .barrett_reduction_const_1 = 0x4869ec38dea713f1, /* floor(x^95 / G) */
83 .barrett_reduction_const_2 = 0x0000000082f63b78, /* (G - x^32) * x^32 */
84#else
85 .fold_across_2_longs_const_hi = 0x493c7d27, /* x^95 mod G */
86 .fold_across_2_longs_const_lo = 0xdd45aab8, /* x^63 mod G */
87 .barrett_reduction_const_1 = 0xdea713f1, /* floor(x^63 / G) */
88 .barrett_reduction_const_2 = 0x82f63b78, /* (G - x^32) * x^0 */
89#endif
90};
91
92/*
93 * Constants generated for most-significant-bit-first CRC-64 using
94 * G(x) = x^64 + x^62 + x^57 + x^55 + x^54 + x^53 + x^52 + x^47 + x^46 + x^45 +
95 * x^40 + x^39 + x^38 + x^37 + x^35 + x^33 + x^32 + x^31 + x^29 + x^27 +
96 * x^24 + x^23 + x^22 + x^21 + x^19 + x^17 + x^13 + x^12 + x^10 + x^9 +
97 * x^7 + x^4 + x^1 + x^0
98 */
99#ifdef CONFIG_64BIT
100static const struct crc_clmul_consts crc64_msb_0x42f0e1eba9ea3693_consts __maybe_unused = {
101 .fold_across_2_longs_const_hi = 0x4eb938a7d257740e, /* x^192 mod G */
102 .fold_across_2_longs_const_lo = 0x05f5c3c7eb52fab6, /* x^128 mod G */
103 .barrett_reduction_const_1 = 0xabc694e836627c39, /* floor(x^127 / G) */
104 .barrett_reduction_const_2 = 0x42f0e1eba9ea3693, /* G - x^64 */
105};
106#endif
107
108/*
109 * Constants generated for least-significant-bit-first CRC-64 using
110 * G(x) = x^64 + x^63 + x^61 + x^59 + x^58 + x^56 + x^55 + x^52 + x^49 + x^48 +
111 * x^47 + x^46 + x^44 + x^41 + x^37 + x^36 + x^34 + x^32 + x^31 + x^28 +
112 * x^26 + x^23 + x^22 + x^19 + x^16 + x^13 + x^12 + x^10 + x^9 + x^6 +
113 * x^4 + x^3 + x^0
114 */
115#ifdef CONFIG_64BIT
116static const struct crc_clmul_consts crc64_lsb_0x9a6c9329ac4bc9b5_consts __maybe_unused = {
117 .fold_across_2_longs_const_hi = 0xeadc41fd2ba3d420, /* x^191 mod G */
118 .fold_across_2_longs_const_lo = 0x21e9761e252621ac, /* x^127 mod G */
119 .barrett_reduction_const_1 = 0x27ecfa329aef9f77, /* floor(x^127 / G) */
120 .barrett_reduction_const_2 = 0x9a6c9329ac4bc9b5, /* (G - x^64) * x^0 */
121};
122#endif
123

source code of linux/lib/crc/riscv/crc-clmul-consts.h