xref: /libCEED/tests/t208-elemrestriction.c (revision db10e42ca2079676d7a17395bfa2477882ba7682)
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 
6 int main(int argc, char **argv) {
7   Ceed ceed;
8   CeedVector x, y;
9   CeedInt ne = 8;
10   CeedInt blksize = 5;
11   CeedInt elemsize = 2;
12   CeedInt ind[elemsize*ne];
13   CeedScalar a[ne+1];
14   CeedElemRestriction r;
15   CeedScalar *y_array;
16 
17   CeedInit(argv[1], &ceed);
18 
19   CeedVectorCreate(ceed, ne+1, &x);
20   for (CeedInt i=0; i<ne+1; i++)
21     a[i] = 10 + i;
22   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, a);
23 
24   for (CeedInt i=0; i<ne; i++) {
25     for (CeedInt k=0; k<elemsize; k++) {
26       ind[elemsize*i+k] = i+k;
27     }
28   }
29   CeedElemRestrictionCreateBlocked(ceed, ne, elemsize, blksize, ne+1, 1, CEED_MEM_HOST,
30                                    CEED_USE_POINTER, ind, &r);
31 
32   CeedVectorCreate(ceed, blksize*elemsize, &y);
33   CeedVectorSetValue(y, 0); // Allocates array
34 
35   // NoTranspose
36   CeedElemRestrictionApplyBlock(r, 1, CEED_NOTRANSPOSE, CEED_NOTRANSPOSE, x, y,
37                                 CEED_REQUEST_IMMEDIATE);
38 
39   // Zero padded entries
40   CeedVectorGetArray(y, CEED_MEM_HOST, &y_array);
41   for (CeedInt i = (elemsize*ne - blksize*elemsize); i < blksize*elemsize; ++i) {
42     y_array[i] = 0;
43   }
44   CeedVectorRestoreArray(y, &y_array);
45   CeedVectorView(y, "%12.8f", stdout);
46 
47   // Transpose
48   CeedVectorGetArray(x, CEED_MEM_HOST, (CeedScalar **)&a);
49   for (CeedInt i=0; i<ne+1; i++)
50     a[i] = 0;
51   CeedVectorRestoreArray(x, (CeedScalar **)&a);
52   CeedElemRestrictionApplyBlock(r, 1, CEED_TRANSPOSE, CEED_NOTRANSPOSE, y, x,
53                                 CEED_REQUEST_IMMEDIATE);
54   CeedVectorView(x, "%12.8f", stdout);
55 
56   CeedVectorDestroy(&x);
57   CeedVectorDestroy(&y);
58   CeedElemRestrictionDestroy(&r);
59   CeedDestroy(&ceed);
60   return 0;
61 }
62