xref: /libCEED/tests/t208-elemrestriction.c (revision 4febb80102c5c87c6a273a85e30d4673d8552be6)
1 /// @file
2 /// Test creation, use, and destruction of a blocked element restriction
3 /// \test Test creation, use, and destruction of a blocked element restriction
4 #include <ceed.h>
5 #include <ceed/backend.h>
6 #include <stdio.h>
7 
8 int main(int argc, char **argv) {
9   Ceed                ceed;
10   CeedVector          x, y;
11   CeedInt             num_elem  = 8;
12   CeedInt             elem_size = 2;
13   CeedInt             blk_size  = 5;
14   CeedInt             ind[elem_size * num_elem];
15   CeedScalar          x_array[num_elem + 1];
16   CeedInt             layout[3];
17   CeedElemRestriction elem_restriction;
18 
19   CeedInit(argv[1], &ceed);
20 
21   CeedVectorCreate(ceed, num_elem + 1, &x);
22   for (CeedInt i = 0; i < num_elem + 1; i++) x_array[i] = 10 + i;
23   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, x_array);
24   CeedVectorCreate(ceed, blk_size * elem_size, &y);
25 
26   for (CeedInt i = 0; i < num_elem; i++) {
27     ind[2 * i + 0] = i;
28     ind[2 * i + 1] = i + 1;
29   }
30   CeedElemRestrictionCreateBlocked(ceed, num_elem, elem_size, blk_size, 1, 1, num_elem + 1, CEED_MEM_HOST, CEED_USE_POINTER, ind, &elem_restriction);
31 
32   // NoTranspose
33   CeedElemRestrictionApplyBlock(elem_restriction, 1, CEED_NOTRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
34   {
35     const CeedScalar *y_array;
36 
37     CeedVectorGetArrayRead(y, CEED_MEM_HOST, &y_array);
38     CeedElemRestrictionGetELayout(elem_restriction, &layout);
39     for (CeedInt i = 0; i < elem_size; i++) {            // Node
40       for (CeedInt j = 0; j < 1; j++) {                  // Component
41         for (CeedInt k = blk_size; k < num_elem; k++) {  // Element
42           CeedInt block = k / blk_size;
43           CeedInt elem  = k % blk_size;
44           CeedInt index = (i * blk_size + elem) * layout[0] + j * layout[1] * blk_size + block * layout[2] * blk_size - blk_size * elem_size;
45           if (y_array[index] != x_array[ind[k * elem_size + i]]) {
46             // LCOV_EXCL_START
47             printf("Error in restricted array y[%" CeedInt_FMT "][%" CeedInt_FMT "][%" CeedInt_FMT "] = %f\n", i, j, k, (double)y_array[index]);
48             // LCOV_EXCL_STOP
49           }
50         }
51       }
52     }
53     CeedVectorRestoreArrayRead(y, &y_array);
54   }
55 
56   // Transpose
57   CeedVectorSetValue(x, 0);
58   CeedElemRestrictionApplyBlock(elem_restriction, 1, CEED_TRANSPOSE, y, x, CEED_REQUEST_IMMEDIATE);
59   {
60     const CeedScalar *x_array;
61 
62     CeedVectorGetArrayRead(x, CEED_MEM_HOST, &x_array);
63     for (CeedInt i = blk_size; i < num_elem + 1; i++) {
64       if (x_array[i] != (10 + i) * (i > blk_size && i < num_elem ? 2.0 : 1.0)) {
65         // LCOV_EXCL_START
66         printf("Error in restricted array x[%" CeedInt_FMT "] = %f\n", i, (double)x_array[i]);
67         // LCOV_EXCL_STOP
68       }
69     }
70     CeedVectorRestoreArrayRead(x, &x_array);
71   }
72 
73   CeedVectorDestroy(&x);
74   CeedVectorDestroy(&y);
75   CeedElemRestrictionDestroy(&elem_restriction);
76   CeedDestroy(&ceed);
77   return 0;
78 }
79