xref: /libCEED/tests/t208-elemrestriction.c (revision b748b478928b2ce7f3faeb46c0d9cffd927360f6)
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 
7 int main(int argc, char **argv) {
8   Ceed                ceed;
9   CeedVector          x, y;
10   CeedInt             num_elem  = 8;
11   CeedInt             elem_size = 2;
12   CeedInt             blk_size  = 5;
13   CeedInt             ind[elem_size * num_elem];
14   CeedScalar          x_array[num_elem + 1];
15   CeedInt             layout[3];
16   CeedElemRestriction elem_restriction;
17 
18   CeedInit(argv[1], &ceed);
19 
20   CeedVectorCreate(ceed, num_elem + 1, &x);
21   for (CeedInt i = 0; i < num_elem + 1; i++) x_array[i] = 10 + i;
22   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, x_array);
23   CeedVectorCreate(ceed, blk_size * elem_size, &y);
24 
25   for (CeedInt i = 0; i < num_elem; i++) {
26     ind[2 * i + 0] = i;
27     ind[2 * i + 1] = i + 1;
28   }
29   CeedElemRestrictionCreateBlocked(ceed, num_elem, elem_size, blk_size, 1, 1, num_elem + 1, CEED_MEM_HOST, CEED_USE_POINTER, ind, &elem_restriction);
30 
31   // NoTranspose
32   CeedElemRestrictionApplyBlock(elem_restriction, 1, CEED_NOTRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
33   {
34     const CeedScalar *y_array;
35 
36     CeedVectorGetArrayRead(y, CEED_MEM_HOST, &y_array);
37     CeedElemRestrictionGetELayout(elem_restriction, &layout);
38     for (CeedInt i = 0; i < elem_size; i++) {            // Node
39       for (CeedInt j = 0; j < 1; j++) {                  // Component
40         for (CeedInt k = blk_size; k < num_elem; k++) {  // Element
41           CeedInt block = k / blk_size;
42           CeedInt elem  = k % blk_size;
43           CeedInt index = (i * blk_size + elem) * layout[0] + j * layout[1] * blk_size + block * layout[2] * blk_size - blk_size * elem_size;
44           if (y_array[index] != x_array[ind[k * elem_size + i]]) {
45             // LCOV_EXCL_START
46             printf("Error in restricted array y[%" CeedInt_FMT "][%" CeedInt_FMT "][%" CeedInt_FMT "] = %f\n", i, j, k, (double)y_array[index]);
47             // LCOV_EXCL_STOP
48           }
49         }
50       }
51     }
52     CeedVectorRestoreArrayRead(y, &y_array);
53   }
54 
55   // Transpose
56   CeedVectorSetValue(x, 0);
57   CeedElemRestrictionApplyBlock(elem_restriction, 1, CEED_TRANSPOSE, y, x, CEED_REQUEST_IMMEDIATE);
58   {
59     const CeedScalar *x_array;
60 
61     CeedVectorGetArrayRead(x, CEED_MEM_HOST, &x_array);
62     for (CeedInt i = blk_size; i < num_elem + 1; i++) {
63       if (x_array[i] != (10 + i) * (i > blk_size && i < num_elem ? 2.0 : 1.0)) {
64         // LCOV_EXCL_START
65         printf("Error in restricted array x[%" CeedInt_FMT "] = %f\n", i, (double)x_array[i]);
66         // LCOV_EXCL_STOP
67       }
68     }
69     CeedVectorRestoreArrayRead(x, &x_array);
70   }
71 
72   CeedVectorDestroy(&x);
73   CeedVectorDestroy(&y);
74   CeedElemRestrictionDestroy(&elem_restriction);
75   CeedDestroy(&ceed);
76   return 0;
77 }
78