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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/* Generate Fibonacci table data.
Copyright 2001, 2002, 2004, 2012, 2014, 2015 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of either:
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
or
* the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any
later version.
or both in parallel, as here.
The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received copies of the GNU General Public License and the
GNU Lesser General Public License along with the GNU MP Library. If not,
see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include "bootstrap.c"
mpz_t *f;
int fnum, fib_limit, luc_limit;
void
generate (int numb_bits)
{
mpz_t limit, l;
int falloc, i;
mpz_init2 (limit, numb_bits + 1);
mpz_setbit (limit, numb_bits);
/* fib(2n) > 2^n, so use 2n as a limit for the table size */
falloc = 2 * numb_bits;
f = (mpz_t*) xmalloc (falloc * sizeof (*f));
mpz_init_set_ui (f[0], 1L); /* F[-1] */
mpz_init_set_ui (f[1], 0L); /* F[0] */
mpz_init (l);
for (i = 2; ; i++)
{
assert (i < falloc);
/* F[i] = F[i-1] + F[i-2] */
mpz_init (f[i]);
mpz_add (f[i], f[i-1], f[i-2]);
if (mpz_cmp (f[i], limit) >= 0)
break;
fnum = i+1;
fib_limit = i-1;
/* L[i] = F[i]+2*F[i-1] */
mpz_add (l, f[i], f[i-1]);
mpz_add (l, l, f[i-1]);
if (mpz_cmp (l, limit) < 0)
luc_limit = i-1;
}
mpz_clear (limit);
}
void
header (int numb_bits)
{
printf ("/* This file generated by gen-fib.c - DO NOT EDIT. */\n");
printf ("\n");
printf ("#if GMP_NUMB_BITS != %d\n", numb_bits);
printf ("Error, error, this data is for %d bits\n", numb_bits);
printf ("#endif\n");
printf ("\n");
printf ("#define FIB_TABLE_LIMIT %d\n", fib_limit);
printf ("#define FIB_TABLE_LUCNUM_LIMIT %d\n", luc_limit);
}
void
table (int numb_bits)
{
int i;
printf ("/* This file generated by gen-fib.c - DO NOT EDIT. */\n");
printf ("\n");
printf ("#include \"gmp.h\"\n");
printf ("#include \"gmp-impl.h\"\n");
printf ("\n");
printf ("#if GMP_NUMB_BITS != %d\n", numb_bits);
printf ("Error, error, this data is for %d bits\n", numb_bits);
printf ("#endif\n");
printf ("\n");
printf ("const mp_limb_t\n");
printf ("__gmp_fib_table[FIB_TABLE_LIMIT+2] = {\n");
for (i = 0; i < fnum; i++)
{
printf (" CNST_LIMB (0x");
mpz_out_str (stdout, 16, f[i]);
printf ("), /* %d */\n", i-1);
}
printf ("};\n");
}
int
main (int argc, char *argv[])
{
int limb_bits, nail_bits, numb_bits;
if (argc != 4)
{
fprintf (stderr, "Usage: gen-fib <header|table> <limbbits> <nailbits>\n");
exit (1);
}
limb_bits = atoi (argv[2]);
nail_bits = atoi (argv[3]);
if (limb_bits <= 0
|| nail_bits < 0
|| nail_bits >= limb_bits)
{
fprintf (stderr, "Invalid limb/nail bits: %d %d\n",
limb_bits, nail_bits);
exit (1);
}
numb_bits = limb_bits - nail_bits;
generate (numb_bits);
if (strcmp (argv[1], "header") == 0)
header (numb_bits);
else if (strcmp (argv[1], "table") == 0)
table (numb_bits);
else
{
fprintf (stderr, "Invalid header/table choice: %s\n", argv[1]);
exit (1);
}
return 0;
}
|
