xref: /libCEED/rust/libceed-sys/c-src/backends/blocked/ceed-blocked-operator.c (revision 6e536b992ff6bc401c55631f1bc4464446496b52)
1 // Copyright (c) 2017-2022, Lawrence Livermore National Security, LLC and other CEED contributors.
2 // All Rights Reserved. See the top-level LICENSE and NOTICE files for details.
3 //
4 // SPDX-License-Identifier: BSD-2-Clause
5 //
6 // This file is part of CEED:  http://github.com/ceed
7 
8 #include <ceed.h>
9 #include <ceed/backend.h>
10 #include <stdbool.h>
11 #include <stddef.h>
12 #include <stdint.h>
13 
14 #include "ceed-blocked.h"
15 
16 //------------------------------------------------------------------------------
17 // Setup Input/Output Fields
18 //------------------------------------------------------------------------------
19 static int CeedOperatorSetupFields_Blocked(CeedQFunction qf, CeedOperator op, bool is_input, const CeedInt block_size,
20                                            CeedElemRestriction *block_rstr, CeedVector *e_vecs_full, CeedVector *e_vecs, CeedVector *q_vecs,
21                                            CeedInt start_e, CeedInt num_fields, CeedInt Q) {
22   Ceed                ceed;
23   CeedSize            e_size, q_size;
24   CeedInt             num_comp, size, P;
25   CeedQFunctionField *qf_fields;
26   CeedOperatorField  *op_fields;
27 
28   {
29     Ceed ceed_parent;
30 
31     CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
32     CeedCallBackend(CeedGetParent(ceed, &ceed_parent));
33     if (ceed_parent) ceed = ceed_parent;
34   }
35   if (is_input) {
36     CeedCallBackend(CeedOperatorGetFields(op, NULL, &op_fields, NULL, NULL));
37     CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
38   } else {
39     CeedCallBackend(CeedOperatorGetFields(op, NULL, NULL, NULL, &op_fields));
40     CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
41   }
42 
43   // Loop over fields
44   for (CeedInt i = 0; i < num_fields; i++) {
45     CeedEvalMode eval_mode;
46     CeedBasis    basis;
47 
48     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
49     if (eval_mode != CEED_EVAL_WEIGHT) {
50       Ceed                ceed_rstr;
51       CeedSize            l_size;
52       CeedInt             num_elem, elem_size, comp_stride;
53       CeedRestrictionType rstr_type;
54       CeedElemRestriction rstr;
55 
56       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[i], &rstr));
57       CeedCallBackend(CeedElemRestrictionGetCeed(rstr, &ceed_rstr));
58       CeedCallBackend(CeedElemRestrictionGetNumElements(rstr, &num_elem));
59       CeedCallBackend(CeedElemRestrictionGetElementSize(rstr, &elem_size));
60       CeedCallBackend(CeedElemRestrictionGetLVectorSize(rstr, &l_size));
61       CeedCallBackend(CeedElemRestrictionGetNumComponents(rstr, &num_comp));
62       CeedCallBackend(CeedElemRestrictionGetCompStride(rstr, &comp_stride));
63 
64       CeedCallBackend(CeedElemRestrictionGetType(rstr, &rstr_type));
65       switch (rstr_type) {
66         case CEED_RESTRICTION_STANDARD: {
67           const CeedInt *offsets = NULL;
68 
69           CeedCallBackend(CeedElemRestrictionGetOffsets(rstr, CEED_MEM_HOST, &offsets));
70           CeedCallBackend(CeedElemRestrictionCreateBlocked(ceed_rstr, num_elem, elem_size, block_size, num_comp, comp_stride, l_size, CEED_MEM_HOST,
71                                                            CEED_COPY_VALUES, offsets, &block_rstr[i + start_e]));
72           CeedCallBackend(CeedElemRestrictionRestoreOffsets(rstr, &offsets));
73         } break;
74         case CEED_RESTRICTION_ORIENTED: {
75           const bool    *orients = NULL;
76           const CeedInt *offsets = NULL;
77 
78           CeedCallBackend(CeedElemRestrictionGetOffsets(rstr, CEED_MEM_HOST, &offsets));
79           CeedCallBackend(CeedElemRestrictionGetOrientations(rstr, CEED_MEM_HOST, &orients));
80           CeedCallBackend(CeedElemRestrictionCreateBlockedOriented(ceed_rstr, num_elem, elem_size, block_size, num_comp, comp_stride, l_size,
81                                                                    CEED_MEM_HOST, CEED_COPY_VALUES, offsets, orients, &block_rstr[i + start_e]));
82           CeedCallBackend(CeedElemRestrictionRestoreOffsets(rstr, &offsets));
83           CeedCallBackend(CeedElemRestrictionRestoreOrientations(rstr, &orients));
84         } break;
85         case CEED_RESTRICTION_CURL_ORIENTED: {
86           const CeedInt8 *curl_orients = NULL;
87           const CeedInt  *offsets      = NULL;
88 
89           CeedCallBackend(CeedElemRestrictionGetOffsets(rstr, CEED_MEM_HOST, &offsets));
90           CeedCallBackend(CeedElemRestrictionGetCurlOrientations(rstr, CEED_MEM_HOST, &curl_orients));
91           CeedCallBackend(CeedElemRestrictionCreateBlockedCurlOriented(ceed_rstr, num_elem, elem_size, block_size, num_comp, comp_stride, l_size,
92                                                                        CEED_MEM_HOST, CEED_COPY_VALUES, offsets, curl_orients,
93                                                                        &block_rstr[i + start_e]));
94           CeedCallBackend(CeedElemRestrictionRestoreOffsets(rstr, &offsets));
95           CeedCallBackend(CeedElemRestrictionRestoreCurlOrientations(rstr, &curl_orients));
96         } break;
97         case CEED_RESTRICTION_STRIDED: {
98           CeedInt strides[3];
99 
100           CeedCallBackend(CeedElemRestrictionGetStrides(rstr, strides));
101           CeedCallBackend(CeedElemRestrictionCreateBlockedStrided(ceed_rstr, num_elem, elem_size, block_size, num_comp, l_size, strides,
102                                                                   &block_rstr[i + start_e]));
103         } break;
104         case CEED_RESTRICTION_POINTS:
105           // Empty case - won't occur
106           break;
107       }
108       CeedCallBackend(CeedElemRestrictionCreateVector(block_rstr[i + start_e], NULL, &e_vecs_full[i + start_e]));
109     }
110 
111     switch (eval_mode) {
112       case CEED_EVAL_NONE:
113         CeedCallBackend(CeedQFunctionFieldGetSize(qf_fields[i], &size));
114         q_size = (CeedSize)Q * size * block_size;
115         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
116         break;
117       case CEED_EVAL_INTERP:
118       case CEED_EVAL_GRAD:
119       case CEED_EVAL_DIV:
120       case CEED_EVAL_CURL:
121         CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
122         CeedCallBackend(CeedQFunctionFieldGetSize(qf_fields[i], &size));
123         CeedCallBackend(CeedBasisGetNumNodes(basis, &P));
124         CeedCallBackend(CeedBasisGetNumComponents(basis, &num_comp));
125         e_size = (CeedSize)P * num_comp * block_size;
126         CeedCallBackend(CeedVectorCreate(ceed, e_size, &e_vecs[i]));
127         q_size = (CeedSize)Q * size * block_size;
128         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
129         break;
130       case CEED_EVAL_WEIGHT:  // Only on input fields
131         CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
132         q_size = (CeedSize)Q * block_size;
133         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
134         CeedCallBackend(CeedBasisApply(basis, block_size, CEED_NOTRANSPOSE, CEED_EVAL_WEIGHT, CEED_VECTOR_NONE, q_vecs[i]));
135         break;
136     }
137   }
138   return CEED_ERROR_SUCCESS;
139 }
140 
141 //------------------------------------------------------------------------------
142 // Setup Operator
143 //------------------------------------------------------------------------------
144 static int CeedOperatorSetup_Blocked(CeedOperator op) {
145   bool                  is_setup_done;
146   Ceed                  ceed;
147   CeedInt               Q, num_input_fields, num_output_fields;
148   const CeedInt         block_size = 8;
149   CeedQFunctionField   *qf_input_fields, *qf_output_fields;
150   CeedQFunction         qf;
151   CeedOperatorField    *op_input_fields, *op_output_fields;
152   CeedOperator_Blocked *impl;
153 
154   CeedCallBackend(CeedOperatorIsSetupDone(op, &is_setup_done));
155   if (is_setup_done) return CEED_ERROR_SUCCESS;
156 
157   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
158   CeedCallBackend(CeedOperatorGetData(op, &impl));
159   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
160   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
161   CeedCallBackend(CeedQFunctionIsIdentity(qf, &impl->is_identity_qf));
162   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
163   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
164 
165   // Allocate
166   CeedCallBackend(CeedCalloc(num_input_fields + num_output_fields, &impl->block_rstr));
167   CeedCallBackend(CeedCalloc(num_input_fields + num_output_fields, &impl->e_vecs_full));
168 
169   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->input_states));
170   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->e_vecs_in));
171   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->e_vecs_out));
172   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->q_vecs_in));
173   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->q_vecs_out));
174 
175   impl->num_inputs  = num_input_fields;
176   impl->num_outputs = num_output_fields;
177 
178   // Set up infield and outfield pointer arrays
179   // Infields
180   CeedCallBackend(CeedOperatorSetupFields_Blocked(qf, op, true, block_size, impl->block_rstr, impl->e_vecs_full, impl->e_vecs_in, impl->q_vecs_in, 0,
181                                                   num_input_fields, Q));
182   // Outfields
183   CeedCallBackend(CeedOperatorSetupFields_Blocked(qf, op, false, block_size, impl->block_rstr, impl->e_vecs_full, impl->e_vecs_out, impl->q_vecs_out,
184                                                   num_input_fields, num_output_fields, Q));
185 
186   // Identity QFunctions
187   if (impl->is_identity_qf) {
188     CeedEvalMode        in_mode, out_mode;
189     CeedQFunctionField *in_fields, *out_fields;
190 
191     CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &in_fields, NULL, &out_fields));
192     CeedCallBackend(CeedQFunctionFieldGetEvalMode(in_fields[0], &in_mode));
193     CeedCallBackend(CeedQFunctionFieldGetEvalMode(out_fields[0], &out_mode));
194 
195     if (in_mode == CEED_EVAL_NONE && out_mode == CEED_EVAL_NONE) {
196       impl->is_identity_rstr_op = true;
197     } else {
198       CeedCallBackend(CeedVectorReferenceCopy(impl->q_vecs_in[0], &impl->q_vecs_out[0]));
199     }
200   }
201 
202   CeedCallBackend(CeedOperatorSetSetupDone(op));
203   return CEED_ERROR_SUCCESS;
204 }
205 
206 //------------------------------------------------------------------------------
207 // Setup Operator Inputs
208 //------------------------------------------------------------------------------
209 static inline int CeedOperatorSetupInputs_Blocked(CeedInt num_input_fields, CeedQFunctionField *qf_input_fields, CeedOperatorField *op_input_fields,
210                                                   CeedVector in_vec, bool skip_active, CeedScalar *e_data_full[2 * CEED_FIELD_MAX],
211                                                   CeedOperator_Blocked *impl, CeedRequest *request) {
212   for (CeedInt i = 0; i < num_input_fields; i++) {
213     uint64_t     state;
214     CeedEvalMode eval_mode;
215     CeedVector   vec;
216 
217     // Get input vector
218     CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
219     if (vec == CEED_VECTOR_ACTIVE) {
220       if (skip_active) continue;
221       else vec = in_vec;
222     }
223 
224     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
225     if (eval_mode == CEED_EVAL_WEIGHT) {  // Skip
226     } else {
227       // Restrict
228       CeedCallBackend(CeedVectorGetState(vec, &state));
229       if (state != impl->input_states[i] || vec == in_vec) {
230         CeedCallBackend(CeedElemRestrictionApply(impl->block_rstr[i], CEED_NOTRANSPOSE, vec, impl->e_vecs_full[i], request));
231         impl->input_states[i] = state;
232       }
233       // Get evec
234       CeedCallBackend(CeedVectorGetArrayRead(impl->e_vecs_full[i], CEED_MEM_HOST, (const CeedScalar **)&e_data_full[i]));
235     }
236   }
237   return CEED_ERROR_SUCCESS;
238 }
239 
240 //------------------------------------------------------------------------------
241 // Input Basis Action
242 //------------------------------------------------------------------------------
243 static inline int CeedOperatorInputBasis_Blocked(CeedInt e, CeedInt Q, CeedQFunctionField *qf_input_fields, CeedOperatorField *op_input_fields,
244                                                  CeedInt num_input_fields, CeedInt block_size, bool skip_active,
245                                                  CeedScalar *e_data_full[2 * CEED_FIELD_MAX], CeedOperator_Blocked *impl) {
246   for (CeedInt i = 0; i < num_input_fields; i++) {
247     CeedInt             elem_size, size, num_comp;
248     CeedEvalMode        eval_mode;
249     CeedElemRestriction elem_rstr;
250     CeedBasis           basis;
251 
252     // Skip active input
253     if (skip_active) {
254       CeedVector vec;
255 
256       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
257       if (vec == CEED_VECTOR_ACTIVE) continue;
258     }
259 
260     // Get elem_size, eval_mode, size
261     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &elem_rstr));
262     CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
263     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
264     CeedCallBackend(CeedQFunctionFieldGetSize(qf_input_fields[i], &size));
265     // Basis action
266     switch (eval_mode) {
267       case CEED_EVAL_NONE:
268         CeedCallBackend(CeedVectorSetArray(impl->q_vecs_in[i], CEED_MEM_HOST, CEED_USE_POINTER, &e_data_full[i][e * Q * size]));
269         break;
270       case CEED_EVAL_INTERP:
271       case CEED_EVAL_GRAD:
272       case CEED_EVAL_DIV:
273       case CEED_EVAL_CURL:
274         CeedCallBackend(CeedOperatorFieldGetBasis(op_input_fields[i], &basis));
275         CeedCallBackend(CeedBasisGetNumComponents(basis, &num_comp));
276         CeedCallBackend(CeedVectorSetArray(impl->e_vecs_in[i], CEED_MEM_HOST, CEED_USE_POINTER, &e_data_full[i][e * elem_size * num_comp]));
277         CeedCallBackend(CeedBasisApply(basis, block_size, CEED_NOTRANSPOSE, eval_mode, impl->e_vecs_in[i], impl->q_vecs_in[i]));
278         break;
279       case CEED_EVAL_WEIGHT:
280         break;  // No action
281     }
282   }
283   return CEED_ERROR_SUCCESS;
284 }
285 
286 //------------------------------------------------------------------------------
287 // Output Basis Action
288 //------------------------------------------------------------------------------
289 static inline int CeedOperatorOutputBasis_Blocked(CeedInt e, CeedInt Q, CeedQFunctionField *qf_output_fields, CeedOperatorField *op_output_fields,
290                                                   CeedInt block_size, CeedInt num_input_fields, CeedInt num_output_fields, CeedOperator op,
291                                                   CeedScalar *e_data_full[2 * CEED_FIELD_MAX], CeedOperator_Blocked *impl) {
292   for (CeedInt i = 0; i < num_output_fields; i++) {
293     CeedInt             elem_size, num_comp;
294     CeedEvalMode        eval_mode;
295     CeedElemRestriction elem_rstr;
296     CeedBasis           basis;
297 
298     // Get elem_size, eval_mode, size
299     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[i], &elem_rstr));
300     CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
301     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
302     // Basis action
303     switch (eval_mode) {
304       case CEED_EVAL_NONE:
305         break;  // No action
306       case CEED_EVAL_INTERP:
307       case CEED_EVAL_GRAD:
308       case CEED_EVAL_DIV:
309       case CEED_EVAL_CURL:
310         CeedCallBackend(CeedOperatorFieldGetBasis(op_output_fields[i], &basis));
311         CeedCallBackend(CeedBasisGetNumComponents(basis, &num_comp));
312         CeedCallBackend(
313             CeedVectorSetArray(impl->e_vecs_out[i], CEED_MEM_HOST, CEED_USE_POINTER, &e_data_full[i + num_input_fields][e * elem_size * num_comp]));
314         CeedCallBackend(CeedBasisApply(basis, block_size, CEED_TRANSPOSE, eval_mode, impl->q_vecs_out[i], impl->e_vecs_out[i]));
315         break;
316       // LCOV_EXCL_START
317       case CEED_EVAL_WEIGHT: {
318         return CeedError(CeedOperatorReturnCeed(op), CEED_ERROR_BACKEND, "CEED_EVAL_WEIGHT cannot be an output evaluation mode");
319         // LCOV_EXCL_STOP
320       }
321     }
322   }
323   return CEED_ERROR_SUCCESS;
324 }
325 
326 //------------------------------------------------------------------------------
327 // Restore Input Vectors
328 //------------------------------------------------------------------------------
329 static inline int CeedOperatorRestoreInputs_Blocked(CeedInt num_input_fields, CeedQFunctionField *qf_input_fields, CeedOperatorField *op_input_fields,
330                                                     bool skip_active, CeedScalar *e_data_full[2 * CEED_FIELD_MAX], CeedOperator_Blocked *impl) {
331   for (CeedInt i = 0; i < num_input_fields; i++) {
332     CeedEvalMode eval_mode;
333 
334     // Skip active inputs
335     if (skip_active) {
336       CeedVector vec;
337 
338       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
339       if (vec == CEED_VECTOR_ACTIVE) continue;
340     }
341     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
342     if (eval_mode == CEED_EVAL_WEIGHT) {  // Skip
343     } else {
344       CeedCallBackend(CeedVectorRestoreArrayRead(impl->e_vecs_full[i], (const CeedScalar **)&e_data_full[i]));
345     }
346   }
347   return CEED_ERROR_SUCCESS;
348 }
349 
350 //------------------------------------------------------------------------------
351 // Operator Apply
352 //------------------------------------------------------------------------------
353 static int CeedOperatorApplyAdd_Blocked(CeedOperator op, CeedVector in_vec, CeedVector out_vec, CeedRequest *request) {
354   CeedInt               Q, num_input_fields, num_output_fields, num_elem, size;
355   const CeedInt         block_size = 8;
356   CeedEvalMode          eval_mode;
357   CeedScalar           *e_data_full[2 * CEED_FIELD_MAX] = {0};
358   CeedQFunctionField   *qf_input_fields, *qf_output_fields;
359   CeedQFunction         qf;
360   CeedOperatorField    *op_input_fields, *op_output_fields;
361   CeedOperator_Blocked *impl;
362 
363   CeedCallBackend(CeedOperatorGetData(op, &impl));
364   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
365   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
366   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
367   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
368   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
369   const CeedInt num_blocks = (num_elem / block_size) + !!(num_elem % block_size);
370 
371   // Setup
372   CeedCallBackend(CeedOperatorSetup_Blocked(op));
373 
374   // Restriction only operator
375   if (impl->is_identity_rstr_op) {
376     CeedCallBackend(CeedElemRestrictionApply(impl->block_rstr[0], CEED_NOTRANSPOSE, in_vec, impl->e_vecs_full[0], request));
377     CeedCallBackend(CeedElemRestrictionApply(impl->block_rstr[1], CEED_TRANSPOSE, impl->e_vecs_full[0], out_vec, request));
378     return CEED_ERROR_SUCCESS;
379   }
380 
381   // Input Evecs and Restriction
382   CeedCallBackend(CeedOperatorSetupInputs_Blocked(num_input_fields, qf_input_fields, op_input_fields, in_vec, false, e_data_full, impl, request));
383 
384   // Output Evecs
385   for (CeedInt i = 0; i < num_output_fields; i++) {
386     CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs_full[i + impl->num_inputs], CEED_MEM_HOST, &e_data_full[i + num_input_fields]));
387   }
388 
389   // Loop through elements
390   for (CeedInt e = 0; e < num_blocks * block_size; e += block_size) {
391     // Output pointers
392     for (CeedInt i = 0; i < num_output_fields; i++) {
393       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
394       if (eval_mode == CEED_EVAL_NONE) {
395         CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[i], &size));
396         CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[i], CEED_MEM_HOST, CEED_USE_POINTER, &e_data_full[i + num_input_fields][e * Q * size]));
397       }
398     }
399 
400     // Input basis apply
401     CeedCallBackend(CeedOperatorInputBasis_Blocked(e, Q, qf_input_fields, op_input_fields, num_input_fields, block_size, false, e_data_full, impl));
402 
403     // Q function
404     if (!impl->is_identity_qf) {
405       CeedCallBackend(CeedQFunctionApply(qf, Q * block_size, impl->q_vecs_in, impl->q_vecs_out));
406     }
407 
408     // Output basis apply
409     CeedCallBackend(CeedOperatorOutputBasis_Blocked(e, Q, qf_output_fields, op_output_fields, block_size, num_input_fields, num_output_fields, op,
410                                                     e_data_full, impl));
411   }
412 
413   // Output restriction
414   for (CeedInt i = 0; i < num_output_fields; i++) {
415     CeedVector vec;
416 
417     // Restore evec
418     CeedCallBackend(CeedVectorRestoreArray(impl->e_vecs_full[i + impl->num_inputs], &e_data_full[i + num_input_fields]));
419     // Get output vector
420     CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &vec));
421     // Active
422     if (vec == CEED_VECTOR_ACTIVE) vec = out_vec;
423     // Restrict
424     CeedCallBackend(
425         CeedElemRestrictionApply(impl->block_rstr[i + impl->num_inputs], CEED_TRANSPOSE, impl->e_vecs_full[i + impl->num_inputs], vec, request));
426   }
427 
428   // Restore input arrays
429   CeedCallBackend(CeedOperatorRestoreInputs_Blocked(num_input_fields, qf_input_fields, op_input_fields, false, e_data_full, impl));
430   return CEED_ERROR_SUCCESS;
431 }
432 
433 //------------------------------------------------------------------------------
434 // Core code for assembling linear QFunction
435 //------------------------------------------------------------------------------
436 static inline int CeedOperatorLinearAssembleQFunctionCore_Blocked(CeedOperator op, bool build_objects, CeedVector *assembled,
437                                                                   CeedElemRestriction *rstr, CeedRequest *request) {
438   Ceed                  ceed;
439   CeedSize              q_size;
440   CeedInt               Q, num_input_fields, num_output_fields, num_elem, size;
441   const CeedInt         block_size = 8;
442   CeedScalar           *l_vec_array;
443   CeedScalar           *e_data_full[2 * CEED_FIELD_MAX] = {0};
444   CeedQFunctionField   *qf_input_fields, *qf_output_fields;
445   CeedQFunction         qf;
446   CeedOperatorField    *op_input_fields, *op_output_fields;
447   CeedOperator_Blocked *impl;
448 
449   CeedCallBackend(CeedOperatorGetData(op, &impl));
450   CeedInt             num_active_in = impl->num_active_in, num_active_out = impl->num_active_out;
451   CeedVector         *active_in  = impl->qf_active_in;
452   CeedVector          l_vec      = impl->qf_l_vec;
453   CeedElemRestriction block_rstr = impl->qf_block_rstr;
454 
455   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
456   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
457   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
458   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
459   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
460   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
461   const CeedInt num_blocks = (num_elem / block_size) + !!(num_elem % block_size);
462 
463   // Setup
464   CeedCallBackend(CeedOperatorSetup_Blocked(op));
465 
466   // Check for restriction only operator
467   CeedCheck(!impl->is_identity_rstr_op, ceed, CEED_ERROR_BACKEND, "Assembling restriction only operators is not supported");
468 
469   // Input Evecs and Restriction
470   CeedCallBackend(CeedOperatorSetupInputs_Blocked(num_input_fields, qf_input_fields, op_input_fields, NULL, true, e_data_full, impl, request));
471 
472   // Count number of active input fields
473   if (!num_active_in) {
474     for (CeedInt i = 0; i < num_input_fields; i++) {
475       CeedScalar *q_vec_array;
476       CeedVector  vec;
477 
478       // Get input vector
479       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
480       // Check if active input
481       if (vec == CEED_VECTOR_ACTIVE) {
482         CeedCallBackend(CeedQFunctionFieldGetSize(qf_input_fields[i], &size));
483         CeedCallBackend(CeedVectorSetValue(impl->q_vecs_in[i], 0.0));
484         CeedCallBackend(CeedVectorGetArray(impl->q_vecs_in[i], CEED_MEM_HOST, &q_vec_array));
485         CeedCallBackend(CeedRealloc(num_active_in + size, &active_in));
486         for (CeedInt field = 0; field < size; field++) {
487           q_size = (CeedSize)Q * block_size;
488           CeedCallBackend(CeedVectorCreate(ceed, q_size, &active_in[num_active_in + field]));
489           CeedCallBackend(
490               CeedVectorSetArray(active_in[num_active_in + field], CEED_MEM_HOST, CEED_USE_POINTER, &q_vec_array[field * Q * block_size]));
491         }
492         num_active_in += size;
493         CeedCallBackend(CeedVectorRestoreArray(impl->q_vecs_in[i], &q_vec_array));
494       }
495     }
496     impl->num_active_in = num_active_in;
497     impl->qf_active_in  = active_in;
498   }
499 
500   // Count number of active output fields
501   if (!num_active_out) {
502     for (CeedInt i = 0; i < num_output_fields; i++) {
503       CeedVector vec;
504 
505       // Get output vector
506       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &vec));
507       // Check if active output
508       if (vec == CEED_VECTOR_ACTIVE) {
509         CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[i], &size));
510         num_active_out += size;
511       }
512     }
513     impl->num_active_out = num_active_out;
514   }
515 
516   // Check sizes
517   CeedCheck(num_active_in > 0 && num_active_out > 0, ceed, CEED_ERROR_BACKEND, "Cannot assemble QFunction without active inputs and outputs");
518 
519   // Setup Lvec
520   if (!l_vec) {
521     const CeedSize l_size = (CeedSize)num_blocks * block_size * Q * num_active_in * num_active_out;
522 
523     CeedCallBackend(CeedVectorCreate(ceed, l_size, &l_vec));
524     impl->qf_l_vec = l_vec;
525   }
526   CeedCallBackend(CeedVectorGetArrayWrite(l_vec, CEED_MEM_HOST, &l_vec_array));
527 
528   // Setup block restriction
529   if (!block_rstr) {
530     const CeedInt strides[3] = {1, Q, num_active_in * num_active_out * Q};
531 
532     CeedCallBackend(CeedElemRestrictionCreateBlockedStrided(ceed, num_elem, Q, block_size, num_active_in * num_active_out,
533                                                             num_active_in * num_active_out * num_elem * Q, strides, &block_rstr));
534     impl->qf_block_rstr = block_rstr;
535   }
536 
537   // Build objects if needed
538   if (build_objects) {
539     const CeedSize l_size     = (CeedSize)num_elem * Q * num_active_in * num_active_out;
540     const CeedInt  strides[3] = {1, Q, num_active_in * num_active_out * Q};
541 
542     // Create output restriction
543     CeedCallBackend(CeedElemRestrictionCreateStrided(ceed, num_elem, Q, num_active_in * num_active_out, num_active_in * num_active_out * num_elem * Q,
544                                                      strides, rstr));
545     // Create assembled vector
546     CeedCallBackend(CeedVectorCreate(ceed, l_size, assembled));
547   }
548 
549   // Loop through elements
550   for (CeedInt e = 0; e < num_blocks * block_size; e += block_size) {
551     // Input basis apply
552     CeedCallBackend(CeedOperatorInputBasis_Blocked(e, Q, qf_input_fields, op_input_fields, num_input_fields, block_size, true, e_data_full, impl));
553 
554     // Assemble QFunction
555     for (CeedInt in = 0; in < num_active_in; in++) {
556       // Set Inputs
557       CeedCallBackend(CeedVectorSetValue(active_in[in], 1.0));
558       if (num_active_in > 1) {
559         CeedCallBackend(CeedVectorSetValue(active_in[(in + num_active_in - 1) % num_active_in], 0.0));
560       }
561       if (!impl->is_identity_qf) {
562         // Set Outputs
563         for (CeedInt out = 0; out < num_output_fields; out++) {
564           CeedVector vec;
565 
566           // Get output vector
567           CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[out], &vec));
568           // Check if active output
569           if (vec == CEED_VECTOR_ACTIVE) {
570             CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[out], CEED_MEM_HOST, CEED_USE_POINTER, l_vec_array));
571             CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[out], &size));
572             l_vec_array += size * Q * block_size;  // Advance the pointer by the size of the output
573           }
574         }
575         // Apply QFunction
576         CeedCallBackend(CeedQFunctionApply(qf, Q * block_size, impl->q_vecs_in, impl->q_vecs_out));
577       } else {
578         const CeedScalar *q_vec_array;
579 
580         // Copy Identity Outputs
581         CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[0], &size));
582         CeedCallBackend(CeedVectorGetArrayRead(impl->q_vecs_out[0], CEED_MEM_HOST, &q_vec_array));
583         for (CeedInt i = 0; i < size * Q * block_size; i++) l_vec_array[i] = q_vec_array[i];
584         CeedCallBackend(CeedVectorRestoreArrayRead(impl->q_vecs_out[0], &q_vec_array));
585         l_vec_array += size * Q * block_size;
586       }
587     }
588   }
589 
590   // Un-set output Qvecs to prevent accidental overwrite of Assembled
591   if (!impl->is_identity_qf) {
592     for (CeedInt out = 0; out < num_output_fields; out++) {
593       CeedVector vec;
594 
595       // Get output vector
596       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[out], &vec));
597       // Check if active output
598       if (vec == CEED_VECTOR_ACTIVE) {
599         CeedCallBackend(CeedVectorTakeArray(impl->q_vecs_out[out], CEED_MEM_HOST, NULL));
600       }
601     }
602   }
603 
604   // Restore input arrays
605   CeedCallBackend(CeedOperatorRestoreInputs_Blocked(num_input_fields, qf_input_fields, op_input_fields, true, e_data_full, impl));
606 
607   // Output blocked restriction
608   CeedCallBackend(CeedVectorRestoreArray(l_vec, &l_vec_array));
609   CeedCallBackend(CeedVectorSetValue(*assembled, 0.0));
610   CeedCallBackend(CeedElemRestrictionApply(block_rstr, CEED_TRANSPOSE, l_vec, *assembled, request));
611   return CEED_ERROR_SUCCESS;
612 }
613 
614 //------------------------------------------------------------------------------
615 // Assemble Linear QFunction
616 //------------------------------------------------------------------------------
617 static int CeedOperatorLinearAssembleQFunction_Blocked(CeedOperator op, CeedVector *assembled, CeedElemRestriction *rstr, CeedRequest *request) {
618   return CeedOperatorLinearAssembleQFunctionCore_Blocked(op, true, assembled, rstr, request);
619 }
620 
621 //------------------------------------------------------------------------------
622 // Update Assembled Linear QFunction
623 //------------------------------------------------------------------------------
624 static int CeedOperatorLinearAssembleQFunctionUpdate_Blocked(CeedOperator op, CeedVector assembled, CeedElemRestriction rstr, CeedRequest *request) {
625   return CeedOperatorLinearAssembleQFunctionCore_Blocked(op, false, &assembled, &rstr, request);
626 }
627 
628 //------------------------------------------------------------------------------
629 // Operator Destroy
630 //------------------------------------------------------------------------------
631 static int CeedOperatorDestroy_Blocked(CeedOperator op) {
632   CeedOperator_Blocked *impl;
633 
634   CeedCallBackend(CeedOperatorGetData(op, &impl));
635 
636   for (CeedInt i = 0; i < impl->num_inputs + impl->num_outputs; i++) {
637     CeedCallBackend(CeedElemRestrictionDestroy(&impl->block_rstr[i]));
638     CeedCallBackend(CeedVectorDestroy(&impl->e_vecs_full[i]));
639   }
640   CeedCallBackend(CeedFree(&impl->block_rstr));
641   CeedCallBackend(CeedFree(&impl->e_vecs_full));
642   CeedCallBackend(CeedFree(&impl->input_states));
643 
644   for (CeedInt i = 0; i < impl->num_inputs; i++) {
645     CeedCallBackend(CeedVectorDestroy(&impl->e_vecs_in[i]));
646     CeedCallBackend(CeedVectorDestroy(&impl->q_vecs_in[i]));
647   }
648   CeedCallBackend(CeedFree(&impl->e_vecs_in));
649   CeedCallBackend(CeedFree(&impl->q_vecs_in));
650 
651   for (CeedInt i = 0; i < impl->num_outputs; i++) {
652     CeedCallBackend(CeedVectorDestroy(&impl->e_vecs_out[i]));
653     CeedCallBackend(CeedVectorDestroy(&impl->q_vecs_out[i]));
654   }
655   CeedCallBackend(CeedFree(&impl->e_vecs_out));
656   CeedCallBackend(CeedFree(&impl->q_vecs_out));
657 
658   // QFunction assembly data
659   for (CeedInt i = 0; i < impl->num_active_in; i++) {
660     CeedCallBackend(CeedVectorDestroy(&impl->qf_active_in[i]));
661   }
662   CeedCallBackend(CeedFree(&impl->qf_active_in));
663   CeedCallBackend(CeedVectorDestroy(&impl->qf_l_vec));
664   CeedCallBackend(CeedElemRestrictionDestroy(&impl->qf_block_rstr));
665 
666   CeedCallBackend(CeedFree(&impl));
667   return CEED_ERROR_SUCCESS;
668 }
669 
670 //------------------------------------------------------------------------------
671 // Operator Create
672 //------------------------------------------------------------------------------
673 int CeedOperatorCreate_Blocked(CeedOperator op) {
674   Ceed                  ceed;
675   CeedOperator_Blocked *impl;
676 
677   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
678   CeedCallBackend(CeedCalloc(1, &impl));
679   CeedCallBackend(CeedOperatorSetData(op, impl));
680   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunction", CeedOperatorLinearAssembleQFunction_Blocked));
681   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunctionUpdate", CeedOperatorLinearAssembleQFunctionUpdate_Blocked));
682   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "ApplyAdd", CeedOperatorApplyAdd_Blocked));
683   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "Destroy", CeedOperatorDestroy_Blocked));
684   return CEED_ERROR_SUCCESS;
685 }
686 
687 //------------------------------------------------------------------------------
688