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
| // RUN: %libomptarget-compile-run-and-check-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-run-and-check-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-run-and-check-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-run-and-check-x86_64-pc-linux-gnu
#include <stdio.h>
#include <omp.h>
// ---------------------------------------------------------------------------
// Various definitions copied from OpenMP RTL
extern void __tgt_register_requires(int64_t);
// End of definitions copied from OpenMP RTL.
// ---------------------------------------------------------------------------
#pragma omp requires unified_shared_memory
#define N 1024
int main(int argc, char *argv[]) {
int fails;
void *host_alloc, *device_alloc;
void *host_data, *device_data;
int *alloc = (int *)malloc(N * sizeof(int));
int data[N];
// Manual registration of requires flags for Clang versions
// that do not support requires.
__tgt_register_requires(8);
for (int i = 0; i < N; ++i) {
alloc[i] = 10;
data[i] = 1;
}
host_data = &data[0];
host_alloc = &alloc[0];
// implicit mapping of data
#pragma omp target map(tofrom : device_data, device_alloc)
{
device_data = &data[0];
device_alloc = &alloc[0];
for (int i = 0; i < N; i++) {
alloc[i] += 1;
data[i] += 1;
}
}
// CHECK: Address of alloc on device matches host address.
if (device_alloc == host_alloc)
printf("Address of alloc on device matches host address.\n");
// CHECK: Address of data on device matches host address.
if (device_data == host_data)
printf("Address of data on device matches host address.\n");
// On the host, check that the arrays have been updated.
// CHECK: Alloc device values updated: Succeeded
fails = 0;
for (int i = 0; i < N; i++) {
if (alloc[i] != 11)
fails++;
}
printf("Alloc device values updated: %s\n",
(fails == 0) ? "Succeeded" : "Failed");
// CHECK: Data device values updated: Succeeded
fails = 0;
for (int i = 0; i < N; i++) {
if (data[i] != 2)
fails++;
}
printf("Data device values updated: %s\n",
(fails == 0) ? "Succeeded" : "Failed");
//
// Test that updates on the host snd on the device are both visible.
//
// Update on the host.
for (int i = 0; i < N; ++i) {
alloc[i] += 1;
data[i] += 1;
}
#pragma omp target
{
// CHECK: Alloc host values updated: Succeeded
fails = 0;
for (int i = 0; i < N; i++) {
if (alloc[i] != 12)
fails++;
}
printf("Alloc host values updated: %s\n",
(fails == 0) ? "Succeeded" : "Failed");
// CHECK: Data host values updated: Succeeded
fails = 0;
for (int i = 0; i < N; i++) {
if (data[i] != 3)
fails++;
}
printf("Data host values updated: %s\n",
(fails == 0) ? "Succeeded" : "Failed");
}
free(alloc);
printf("Done!\n");
return 0;
}
|