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
|
// RUN: %libomptarget-compile-run-and-check-generic
// REQUIRES: libc
#include <assert.h>
#include <omp.h>
#include <stdio.h>
#pragma omp begin declare variant match(device = {kind(gpu)})
// Extension provided by the 'libc' project.
void rpc_host_call(void *fn, void *args, size_t size);
#pragma omp declare target to(rpc_host_call) device_type(nohost)
#pragma omp end declare variant
#pragma omp begin declare variant match(device = {kind(cpu)})
// Dummy host implementation to make this work for all targets.
void rpc_host_call(void *fn, void *args, size_t size) {
((void (*)(void *))fn)(args);
}
#pragma omp end declare variant
typedef struct args_s {
int thread_id;
int block_id;
} args_t;
// CHECK-DAG: Thread: 0, Block: 0
// CHECK-DAG: Thread: 1, Block: 0
// CHECK-DAG: Thread: 0, Block: 1
// CHECK-DAG: Thread: 1, Block: 1
// CHECK-DAG: Thread: 0, Block: 2
// CHECK-DAG: Thread: 1, Block: 2
// CHECK-DAG: Thread: 0, Block: 3
// CHECK-DAG: Thread: 1, Block: 3
void foo(void *data) {
assert(omp_is_initial_device() && "Not executing on host?");
args_t *args = (args_t *)data;
printf("Thread: %d, Block: %d\n", args->thread_id, args->block_id);
}
void *fn_ptr = NULL;
#pragma omp declare target to(fn_ptr)
int main() {
fn_ptr = (void *)&foo;
#pragma omp target update to(fn_ptr)
#pragma omp target teams num_teams(4)
#pragma omp parallel num_threads(2)
{
args_t args = {omp_get_thread_num(), omp_get_team_num()};
rpc_host_call(fn_ptr, &args, sizeof(args_t));
}
}
|
