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/* { dg-do run } */
/* { dg-require-effective-target offload_device_nonshared_as } */
/* Test target enter data and target update to the target using map
iterators with a function. */
#include <stdlib.h>
#define DIM1 8
#define DIM2 15
void mkarray (int *x[])
{
for (int i = 0; i < DIM1; i++)
{
x[i] = (int *) malloc (DIM2 * sizeof (int));
for (int j = 0; j < DIM2; j++)
x[i][j] = rand ();
}
}
int f (int i)
{
return i * 2;
}
int main (void)
{
int *x[DIM1], x_new[DIM1][DIM2];
int sum, expected;
mkarray (x);
#pragma omp target enter data map(alloc: x[:DIM1])
#pragma omp target enter data map(iterator(i=0:DIM1), to: x[i][:DIM2])
/* Update x on host. */
for (int i = 0; i < DIM1; i++)
for (int j = 0; j < DIM2; j++)
{
x_new[i][j] = x[i][j];
x[i][j] = (i + 1) * (j + 2);
}
/* Update a subset of x on target. */
#pragma omp target update to(iterator(i=0:DIM1/2): x[f (i)][:DIM2])
#pragma omp target map(from: sum)
{
sum = 0;
for (int i = 0; i < DIM1; i++)
for (int j = 0; j < DIM2; j++)
sum += x[i][j];
}
/* Calculate expected value on host. */
for (int i = 0; i < DIM1/2; i++)
for (int j = 0; j < DIM2; j++)
x_new[f (i)][j] = x[f (i)][j];
expected = 0;
for (int i = 0; i < DIM1; i++)
for (int j = 0; j < DIM2; j++)
expected += x_new[i][j];
return sum - expected;
}
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