1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* GF-Complete: A Comprehensive Open Source Library for Galois Field Arithmetic
* James S. Plank, Ethan L. Miller, Kevin M. Greenan,
* Benjamin A. Arnold, John A. Burnum, Adam W. Disney, Allen C. McBride.
*
* gf_w32.h
*
* Defines and data structures for 32-bit Galois fields
*/
#ifndef GF_COMPLETE_GF_W32_H
#define GF_COMPLETE_GF_W32_H
#include <stdint.h>
#define GF_FIELD_WIDTH (32)
#define GF_FIRST_BIT ((gf_val_32_t)1 << 31)
#define GF_BASE_FIELD_WIDTH (16)
#define GF_BASE_FIELD_SIZE (1 << GF_BASE_FIELD_WIDTH)
#define GF_BASE_FIELD_GROUP_SIZE GF_BASE_FIELD_SIZE-1
#define GF_MULTBY_TWO(p) (((p) & GF_FIRST_BIT) ? (((p) << 1) ^ h->prim_poly) : (p) << 1)
struct gf_split_2_32_lazy_data {
uint32_t tables[16][4];
uint32_t last_value;
};
struct gf_w32_split_8_8_data {
uint32_t tables[7][256][256];
uint32_t region_tables[4][256];
uint32_t last_value;
};
struct gf_w32_group_data {
uint32_t *reduce;
uint32_t *shift;
int tshift;
uint64_t rmask;
uint32_t *memory;
};
struct gf_split_16_32_lazy_data {
uint32_t tables[2][(1<<16)];
uint32_t last_value;
};
struct gf_split_8_32_lazy_data {
uint32_t tables[4][256];
uint32_t last_value;
};
struct gf_split_4_32_lazy_data {
uint32_t tables[8][16];
uint32_t last_value;
};
struct gf_w32_bytwo_data {
uint64_t prim_poly;
uint64_t mask1;
uint64_t mask2;
};
struct gf_w32_composite_data {
uint16_t *log;
uint16_t *alog;
};
void gf_w32_neon_split_init(gf_t *gf);
#endif /* GF_COMPLETE_GF_W32_H */
|
