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
157
158
159
160
161
162
163
164
165
166
167
168
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#ifndef __BIG_H__
#define __BIG_H__
#ifndef __SYS_H__
#include "sys.h"
#endif
#ifndef __CONFIG_H__
#include "erl_vm.h"
#endif
#ifndef __GLOBAL_H__
#include "global.h"
#endif
typedef Uint ErtsDigit;
#if ((SIZEOF_VOID_P == 4) || HALFWORD_HEAP) && defined(SIZEOF_LONG_LONG) && (SIZEOF_LONG_LONG == 8)
/* Assume 32-bit machine with long long support */
typedef Uint64 ErtsDoubleDigit;
typedef Uint16 ErtsHalfDigit;
#define BIG_HAVE_DOUBLE_DIGIT 1
#elif (SIZEOF_VOID_P == 4)
/* Assume 32-bit machine with no long support */
#undef BIG_HAVE_DOUBLE_DIGIT
typedef Uint16 ErtsHalfDigit;
#elif (SIZEOF_VOID_P == 8)
/* Assume 64-bit machine, does it exist 128 bit long long long ? */
#undef BIG_HAVE_DOUBLE_DIGIT
typedef Uint32 ErtsHalfDigit;
#else
#error "can not determine machine size"
#endif
#define D_DECIMAL_EXP 9
#define D_DECIMAL_BASE 1000000000
typedef Uint dsize_t; /* Vector size type */
#define D_EXP (ERTS_SIZEOF_ETERM*8)
#define D_MASK ((ErtsDigit)(-1)) /* D_BASE-1 */
/* macros for bignum objects */
#define big_v(x) BIG_V(big_val(x))
#define big_sign(x) BIG_SIGN(big_val(x))
#define big_arity(x) BIG_ARITY(big_val(x))
#define big_digit(x,i) BIG_DIGIT(big_val(x),i)
#define big_size(x) BIG_SIZE(big_val(x))
/* macros for thing pointers */
#define BIG_V(xp) ((ErtsDigit*)((xp)+1))
#define BIG_SIGN(xp) (!!bignum_header_is_neg(*xp))
#define BIG_ARITY(xp) ((Uint)bignum_header_arity(*(xp)))
#define BIG_DIGIT(xp,i) *(BIG_V(xp)+(i))
#define BIG_DIGITS_PER_WORD (sizeof(Uint)/sizeof(ErtsDigit))
#define BIG_SIZE(xp) BIG_ARITY(xp)
/* Check for small */
#define IS_USMALL(sgn,x) ((sgn) ? ((x) <= MAX_SMALL+1) : ((x) <= MAX_SMALL))
#define IS_SSMALL(x) (((x) >= MIN_SMALL) && ((x) <= MAX_SMALL))
/* The heap size needed for a bignum */
#define BIG_NEED_SIZE(x) ((x) + 1)
#define BIG_UINT_HEAP_SIZE (1 + 1) /* always, since sizeof(Uint) <= sizeof(Eterm) */
#if HALFWORD_HEAP
#define BIG_UWORD_HEAP_SIZE(UW) (((UW) >> (sizeof(Uint) * 8)) ? 3 : 2)
#else
#define BIG_UWORD_HEAP_SIZE(UW) BIG_UINT_HEAP_SIZE
#endif
#if defined(ARCH_32) || HALFWORD_HEAP
#define ERTS_UINT64_BIG_HEAP_SIZE__(X) \
((X) >= (((Uint64) 1) << 32) ? (1 + 2) : (1 + 1))
#define ERTS_SINT64_HEAP_SIZE(X) \
(IS_SSMALL((X)) \
? 0 \
: ERTS_UINT64_BIG_HEAP_SIZE__((X) >= 0 ? (X) : -(X)))
#define ERTS_UINT64_HEAP_SIZE(X) \
(IS_USMALL(0, (X)) ? 0 : ERTS_UINT64_BIG_HEAP_SIZE__((X)))
#else
#define ERTS_SINT64_HEAP_SIZE(X) \
(IS_SSMALL((X)) ? 0 : (1 + 1))
#define ERTS_UINT64_HEAP_SIZE(X) \
(IS_USMALL(0, (X)) ? 0 : (1 + 1))
#endif
int big_decimal_estimate(Wterm);
Eterm erts_big_to_list(Eterm, Eterm**);
char *erts_big_to_string(Wterm x, char *buf, Uint buf_sz);
Eterm small_times(Sint, Sint, Eterm*);
Eterm big_plus(Wterm, Wterm, Eterm*);
Eterm big_minus(Eterm, Eterm, Eterm*);
Eterm big_times(Eterm, Eterm, Eterm*);
Eterm big_div(Eterm, Eterm, Eterm*);
Eterm big_rem(Eterm, Eterm, Eterm*);
Eterm big_neg(Eterm, Eterm*);
Eterm big_minus_small(Eterm, Uint, Eterm*);
Eterm big_plus_small(Eterm, Uint, Eterm*);
Eterm big_times_small(Eterm, Uint, Eterm*);
Eterm big_band(Eterm, Eterm, Eterm*);
Eterm big_bor(Eterm, Eterm, Eterm*);
Eterm big_bxor(Eterm, Eterm, Eterm*);
Eterm big_bnot(Eterm, Eterm*);
Eterm big_lshift(Eterm, Sint, Eterm*);
int big_comp (Wterm, Wterm);
int big_ucomp (Eterm, Eterm);
int big_to_double(Wterm x, double* resp);
Eterm double_to_big(double, Eterm*);
Eterm small_to_big(Sint, Eterm*);
Eterm uint_to_big(Uint, Eterm*);
Eterm uword_to_big(UWord, Eterm*);
Eterm erts_make_integer(Uint, Process *);
dsize_t big_bytes(Eterm);
Eterm bytes_to_big(byte*, dsize_t, int, Eterm*);
byte* big_to_bytes(Eterm, byte*);
int term_to_Uint(Eterm, Uint*);
int term_to_UWord(Eterm, UWord*);
int term_to_Sint(Eterm, Sint*);
#if HAVE_INT64
int term_to_Uint64(Eterm, Uint64*);
int term_to_Sint64(Eterm, Sint64*);
#endif
Uint32 big_to_uint32(Eterm b);
int term_equals_2pow32(Eterm);
Eterm erts_uint64_to_big(Uint64, Eterm **);
Eterm erts_sint64_to_big(Sint64, Eterm **);
#endif
|
