blob: 4e5164b67e04f414bb7d72e0e760b04374984467 (
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
|
#pragma once
#include <cmath>
#include <stdlib.h>
#include "types.h"
class ising_t {
public:
bool x;
typedef int M_t;
typedef double F_t;
};
void init(ising_t *p) {
p->x = false;
}
void free_spin(ising_t s) {
// do nothing!
}
void free_spin(int s) {
// do nothing
}
void free_spin(double s) {
// do nothing
}
ising_t copy(ising_t s) {
return s;
}
template <class T>
void add(T *s1, T a, ising_t s2) {
if (s2.x) {
*s1 -= a;
} else {
*s1 += a;
}
}
int scalar_multiple(int factor, ising_t s) {
if (s.x) {
return -factor;
} else {
return factor;
}
}
double norm_squared(double s) {
return pow(s, 2);
}
template <class T>
void write_magnetization(T M, FILE *outfile) {
fwrite(&M, sizeof(T), 1, outfile);
}
// below this line is unnecessary, but convenient
double ising_dot(ising_t s1, ising_t s2) {
if (s1.x == s2.x) {
return 1.0;
} else {
return -1.0;
}
}
double scalar_field(ising_t s, double H) {
if (s.x) {
return -H;
} else {
return H;
}
}
|