blob: aa8a76abeb246710065f6f363131aaedbf5a2d38 (
plain)
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
|
//===--- act_var.h ----------------------------------------------------------===
//
// satoko: Satisfiability solver
//
// This file is distributed under the BSD 2-Clause License.
// See LICENSE for details.
//
//===------------------------------------------------------------------------===
#ifndef satoko__act_var_h
#define satoko__act_var_h
#include "solver.h"
#include "types.h"
#include "utils/heap.h"
#include "misc/util/abc_global.h"
ABC_NAMESPACE_HEADER_START
#if defined SATOKO_ACT_VAR_DBLE || defined SATOKO_ACT_VAR_FLOAT
/** Re-scale the activity value for all variables.
*/
static inline void var_act_rescale(solver_t *s)
{
unsigned i;
act_t *activity = vec_act_data(s->activity);
for (i = 0; i < vec_act_size(s->activity); i++)
activity[i] *= VAR_ACT_RESCALE;
s->var_act_inc *= VAR_ACT_RESCALE;
}
/** Increment the activity value of one variable ('var')
*/
static inline void var_act_bump(solver_t *s, unsigned var)
{
act_t *activity = vec_act_data(s->activity);
activity[var] += s->var_act_inc;
if (activity[var] > VAR_ACT_LIMIT)
var_act_rescale(s);
if (heap_in_heap(s->var_order, var))
heap_decrease(s->var_order, var);
}
/** Increment the value by which variables activity values are incremented
*/
static inline void var_act_decay(solver_t *s)
{
s->var_act_inc *= (1 / s->opts.var_decay);
}
#else
static inline void var_act_rescale(solver_t *s)
{
unsigned i;
act_t *activity = vec_act_data(s->activity);
for (i = 0; i < vec_act_size(s->activity); i++)
activity[i] >>= 19;
s->var_act_inc = stk_uint_max((s->var_act_inc >> 19), (1 << 5));
}
static inline void var_act_bump(solver_t *s, unsigned var)
{
act_t *activity = vec_act_data(s->activity);
activity[var] += s->var_act_inc;
if (activity[var] & 0xF0000000)
var_act_rescale(s);
if (heap_in_heap(s->var_order, var))
heap_decrease(s->var_order, var);
}
static inline void var_act_decay(solver_t *s)
{
s->var_act_inc += (s->var_act_inc >> 4);
}
#endif /* SATOKO_ACT_VAR_DBLE || SATOKO_ACT_VAR_FLOAT */
ABC_NAMESPACE_HEADER_END
#endif /* satoko__act_var_h */
|
