xref: /libCEED/backends/hip-ref/ceed-hip-ref-operator.c (revision e704478d3a07b8dc34bf6914bf778ffa4b5a3b53)
1 // Copyright (c) 2017-2024, 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 <ceed/jit-tools.h>
11 #include <assert.h>
12 #include <stdbool.h>
13 #include <string.h>
14 #include <hip/hip_runtime.h>
15 
16 #include "../hip/ceed-hip-common.h"
17 #include "../hip/ceed-hip-compile.h"
18 #include "ceed-hip-ref.h"
19 
20 //------------------------------------------------------------------------------
21 // Destroy operator
22 //------------------------------------------------------------------------------
23 static int CeedOperatorDestroy_Hip(CeedOperator op) {
24   CeedOperator_Hip *impl;
25 
26   CeedCallBackend(CeedOperatorGetData(op, &impl));
27 
28   // Apply data
29   CeedCallBackend(CeedFree(&impl->num_points));
30   CeedCallBackend(CeedFree(&impl->skip_rstr_in));
31   CeedCallBackend(CeedFree(&impl->skip_rstr_out));
32   CeedCallBackend(CeedFree(&impl->apply_add_basis_out));
33   CeedCallBackend(CeedFree(&impl->input_field_order));
34   CeedCallBackend(CeedFree(&impl->output_field_order));
35   CeedCallBackend(CeedFree(&impl->input_states));
36 
37   for (CeedInt i = 0; i < impl->num_inputs; i++) {
38     CeedCallBackend(CeedVectorDestroy(&impl->e_vecs_in[i]));
39     CeedCallBackend(CeedVectorDestroy(&impl->q_vecs_in[i]));
40   }
41   CeedCallBackend(CeedFree(&impl->e_vecs_in));
42   CeedCallBackend(CeedFree(&impl->q_vecs_in));
43 
44   for (CeedInt i = 0; i < impl->num_outputs; i++) {
45     CeedCallBackend(CeedVectorDestroy(&impl->e_vecs_out[i]));
46     CeedCallBackend(CeedVectorDestroy(&impl->q_vecs_out[i]));
47   }
48   CeedCallBackend(CeedFree(&impl->e_vecs_out));
49   CeedCallBackend(CeedFree(&impl->q_vecs_out));
50   CeedCallBackend(CeedVectorDestroy(&impl->point_coords_elem));
51 
52   // QFunction assembly data
53   for (CeedInt i = 0; i < impl->num_active_in; i++) {
54     CeedCallBackend(CeedVectorDestroy(&impl->qf_active_in[i]));
55   }
56   CeedCallBackend(CeedFree(&impl->qf_active_in));
57 
58   // Diag data
59   if (impl->diag) {
60     Ceed ceed;
61 
62     CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
63     if (impl->diag->module) {
64       CeedCallHip(ceed, hipModuleUnload(impl->diag->module));
65     }
66     if (impl->diag->module_point_block) {
67       CeedCallHip(ceed, hipModuleUnload(impl->diag->module_point_block));
68     }
69     CeedCallHip(ceed, hipFree(impl->diag->d_eval_modes_in));
70     CeedCallHip(ceed, hipFree(impl->diag->d_eval_modes_out));
71     CeedCallHip(ceed, hipFree(impl->diag->d_identity));
72     CeedCallHip(ceed, hipFree(impl->diag->d_interp_in));
73     CeedCallHip(ceed, hipFree(impl->diag->d_interp_out));
74     CeedCallHip(ceed, hipFree(impl->diag->d_grad_in));
75     CeedCallHip(ceed, hipFree(impl->diag->d_grad_out));
76     CeedCallHip(ceed, hipFree(impl->diag->d_div_in));
77     CeedCallHip(ceed, hipFree(impl->diag->d_div_out));
78     CeedCallHip(ceed, hipFree(impl->diag->d_curl_in));
79     CeedCallHip(ceed, hipFree(impl->diag->d_curl_out));
80     CeedCallBackend(CeedElemRestrictionDestroy(&impl->diag->diag_rstr));
81     CeedCallBackend(CeedElemRestrictionDestroy(&impl->diag->point_block_diag_rstr));
82     CeedCallBackend(CeedVectorDestroy(&impl->diag->elem_diag));
83     CeedCallBackend(CeedVectorDestroy(&impl->diag->point_block_elem_diag));
84   }
85   CeedCallBackend(CeedFree(&impl->diag));
86 
87   if (impl->asmb) {
88     Ceed ceed;
89 
90     CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
91     CeedCallHip(ceed, hipModuleUnload(impl->asmb->module));
92     CeedCallHip(ceed, hipFree(impl->asmb->d_B_in));
93     CeedCallHip(ceed, hipFree(impl->asmb->d_B_out));
94   }
95   CeedCallBackend(CeedFree(&impl->asmb));
96 
97   CeedCallBackend(CeedFree(&impl));
98   return CEED_ERROR_SUCCESS;
99 }
100 
101 //------------------------------------------------------------------------------
102 // Setup infields or outfields
103 //------------------------------------------------------------------------------
104 static int CeedOperatorSetupFields_Hip(CeedQFunction qf, CeedOperator op, bool is_input, bool is_at_points, bool *skip_rstr, bool *apply_add_basis,
105                                        CeedVector *e_vecs, CeedVector *q_vecs, CeedInt num_fields, CeedInt Q, CeedInt num_elem) {
106   Ceed                ceed;
107   CeedQFunctionField *qf_fields;
108   CeedOperatorField  *op_fields;
109 
110   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
111   if (is_input) {
112     CeedCallBackend(CeedOperatorGetFields(op, NULL, &op_fields, NULL, NULL));
113     CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
114   } else {
115     CeedCallBackend(CeedOperatorGetFields(op, NULL, NULL, NULL, &op_fields));
116     CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
117   }
118 
119   // Loop over fields
120   for (CeedInt i = 0; i < num_fields; i++) {
121     bool                is_active = false, is_strided = false, skip_e_vec = false;
122     CeedSize            q_size;
123     CeedInt             size;
124     CeedEvalMode        eval_mode;
125     CeedVector          l_vec;
126     CeedElemRestriction elem_rstr;
127 
128     // Check whether this field can skip the element restriction:
129     // Input CEED_VECTOR_ACTIVE
130     // Output CEED_VECTOR_ACTIVE without CEED_EVAL_NONE
131     // Input CEED_VECTOR_NONE with CEED_EVAL_WEIGHT
132     // Input passive vectorr with CEED_EVAL_NONE and strided restriction with CEED_STRIDES_BACKEND
133     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &l_vec));
134     is_active = l_vec == CEED_VECTOR_ACTIVE;
135     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[i], &elem_rstr));
136     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
137     skip_e_vec = (is_input && is_active) || (is_active && eval_mode != CEED_EVAL_NONE) || (eval_mode == CEED_EVAL_WEIGHT);
138     if (!skip_e_vec && is_input && !is_active && eval_mode == CEED_EVAL_NONE) {
139       CeedCallBackend(CeedElemRestrictionIsStrided(elem_rstr, &is_strided));
140       if (is_strided) CeedCallBackend(CeedElemRestrictionHasBackendStrides(elem_rstr, &skip_e_vec));
141     }
142     if (skip_e_vec) {
143       e_vecs[i] = NULL;
144     } else {
145       CeedCallBackend(CeedElemRestrictionCreateVector(elem_rstr, NULL, &e_vecs[i]));
146     }
147 
148     switch (eval_mode) {
149       case CEED_EVAL_NONE:
150       case CEED_EVAL_INTERP:
151       case CEED_EVAL_GRAD:
152       case CEED_EVAL_DIV:
153       case CEED_EVAL_CURL:
154         CeedCallBackend(CeedQFunctionFieldGetSize(qf_fields[i], &size));
155         q_size = (CeedSize)num_elem * (CeedSize)Q * (CeedSize)size;
156         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
157         break;
158       case CEED_EVAL_WEIGHT: {
159         CeedBasis basis;
160 
161         CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
162         q_size = (CeedSize)num_elem * (CeedSize)Q;
163         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
164         if (is_at_points) {
165           CeedInt num_points[num_elem];
166 
167           for (CeedInt i = 0; i < num_elem; i++) num_points[i] = Q;
168           CeedCallBackend(
169               CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_NOTRANSPOSE, CEED_EVAL_WEIGHT, CEED_VECTOR_NONE, CEED_VECTOR_NONE, q_vecs[i]));
170         } else {
171           CeedCallBackend(CeedBasisApply(basis, num_elem, CEED_NOTRANSPOSE, CEED_EVAL_WEIGHT, CEED_VECTOR_NONE, q_vecs[i]));
172         }
173         break;
174       }
175     }
176   }
177   // Drop duplicate restrictions
178   if (is_input) {
179     for (CeedInt i = 0; i < num_fields; i++) {
180       CeedVector          vec_i;
181       CeedElemRestriction rstr_i;
182 
183       CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec_i));
184       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[i], &rstr_i));
185       for (CeedInt j = i + 1; j < num_fields; j++) {
186         CeedVector          vec_j;
187         CeedElemRestriction rstr_j;
188 
189         CeedCallBackend(CeedOperatorFieldGetVector(op_fields[j], &vec_j));
190         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[j], &rstr_j));
191         if (vec_i == vec_j && rstr_i == rstr_j) {
192           if (e_vecs[i]) CeedCallBackend(CeedVectorReferenceCopy(e_vecs[i], &e_vecs[j]));
193           skip_rstr[j] = true;
194         }
195       }
196     }
197   } else {
198     for (CeedInt i = num_fields - 1; i >= 0; i--) {
199       CeedVector          vec_i;
200       CeedElemRestriction rstr_i;
201 
202       CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec_i));
203       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[i], &rstr_i));
204       for (CeedInt j = i - 1; j >= 0; j--) {
205         CeedVector          vec_j;
206         CeedElemRestriction rstr_j;
207 
208         CeedCallBackend(CeedOperatorFieldGetVector(op_fields[j], &vec_j));
209         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[j], &rstr_j));
210         if (vec_i == vec_j && rstr_i == rstr_j) {
211           if (e_vecs[i]) CeedCallBackend(CeedVectorReferenceCopy(e_vecs[i], &e_vecs[j]));
212           skip_rstr[j]       = true;
213           apply_add_basis[i] = true;
214         }
215       }
216     }
217   }
218   return CEED_ERROR_SUCCESS;
219 }
220 
221 //------------------------------------------------------------------------------
222 // CeedOperator needs to connect all the named fields (be they active or passive) to the named inputs and outputs of its CeedQFunction.
223 //------------------------------------------------------------------------------
224 static int CeedOperatorSetup_Hip(CeedOperator op) {
225   Ceed                ceed;
226   bool                is_setup_done;
227   CeedInt             Q, num_elem, num_input_fields, num_output_fields;
228   CeedQFunctionField *qf_input_fields, *qf_output_fields;
229   CeedQFunction       qf;
230   CeedOperatorField  *op_input_fields, *op_output_fields;
231   CeedOperator_Hip   *impl;
232 
233   CeedCallBackend(CeedOperatorIsSetupDone(op, &is_setup_done));
234   if (is_setup_done) return CEED_ERROR_SUCCESS;
235 
236   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
237   CeedCallBackend(CeedOperatorGetData(op, &impl));
238   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
239   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
240   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
241   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
242   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
243 
244   // Allocate
245   CeedCallBackend(CeedCalloc(num_input_fields, &impl->e_vecs_in));
246   CeedCallBackend(CeedCalloc(num_output_fields, &impl->e_vecs_out));
247   CeedCallBackend(CeedCalloc(num_input_fields, &impl->skip_rstr_in));
248   CeedCallBackend(CeedCalloc(num_output_fields, &impl->skip_rstr_out));
249   CeedCallBackend(CeedCalloc(num_output_fields, &impl->apply_add_basis_out));
250   CeedCallBackend(CeedCalloc(num_input_fields, &impl->input_field_order));
251   CeedCallBackend(CeedCalloc(num_output_fields, &impl->output_field_order));
252   CeedCallBackend(CeedCalloc(num_input_fields, &impl->input_states));
253   CeedCallBackend(CeedCalloc(num_input_fields, &impl->q_vecs_in));
254   CeedCallBackend(CeedCalloc(num_output_fields, &impl->q_vecs_out));
255   impl->num_inputs  = num_input_fields;
256   impl->num_outputs = num_output_fields;
257 
258   // Set up infield and outfield e-vecs and q-vecs
259   CeedCallBackend(
260       CeedOperatorSetupFields_Hip(qf, op, true, false, impl->skip_rstr_in, NULL, impl->e_vecs_in, impl->q_vecs_in, num_input_fields, Q, num_elem));
261   CeedCallBackend(CeedOperatorSetupFields_Hip(qf, op, false, false, impl->skip_rstr_out, impl->apply_add_basis_out, impl->e_vecs_out,
262                                               impl->q_vecs_out, num_output_fields, Q, num_elem));
263 
264   // Reorder fields to allow reuse of buffers
265   impl->max_active_e_vec_len = 0;
266   {
267     bool    is_ordered[CEED_FIELD_MAX];
268     CeedInt curr_index = 0;
269 
270     for (CeedInt i = 0; i < num_input_fields; i++) is_ordered[i] = false;
271     for (CeedInt i = 0; i < num_input_fields; i++) {
272       CeedSize            e_vec_len_i;
273       CeedVector          vec_i;
274       CeedElemRestriction rstr_i;
275 
276       if (is_ordered[i]) continue;
277       is_ordered[i]                       = true;
278       impl->input_field_order[curr_index] = i;
279       curr_index++;
280       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec_i));
281       if (vec_i == CEED_VECTOR_NONE) continue;  // CEED_EVAL_WEIGHT
282       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &rstr_i));
283       CeedCallBackend(CeedElemRestrictionGetEVectorSize(rstr_i, &e_vec_len_i));
284       impl->max_active_e_vec_len = e_vec_len_i > impl->max_active_e_vec_len ? e_vec_len_i : impl->max_active_e_vec_len;
285       for (CeedInt j = i + 1; j < num_input_fields; j++) {
286         CeedVector          vec_j;
287         CeedElemRestriction rstr_j;
288 
289         CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[j], &vec_j));
290         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[j], &rstr_j));
291         if (rstr_i == rstr_j && vec_i == vec_j) {
292           is_ordered[j]                       = true;
293           impl->input_field_order[curr_index] = j;
294           curr_index++;
295         }
296       }
297     }
298   }
299   {
300     bool    is_ordered[CEED_FIELD_MAX];
301     CeedInt curr_index = 0;
302 
303     for (CeedInt i = 0; i < num_output_fields; i++) is_ordered[i] = false;
304     for (CeedInt i = 0; i < num_output_fields; i++) {
305       CeedSize            e_vec_len_i;
306       CeedVector          vec_i;
307       CeedElemRestriction rstr_i;
308 
309       if (is_ordered[i]) continue;
310       is_ordered[i]                        = true;
311       impl->output_field_order[curr_index] = i;
312       curr_index++;
313       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &vec_i));
314       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[i], &rstr_i));
315       CeedCallBackend(CeedElemRestrictionGetEVectorSize(rstr_i, &e_vec_len_i));
316       impl->max_active_e_vec_len = e_vec_len_i > impl->max_active_e_vec_len ? e_vec_len_i : impl->max_active_e_vec_len;
317       for (CeedInt j = i + 1; j < num_output_fields; j++) {
318         CeedVector          vec_j;
319         CeedElemRestriction rstr_j;
320 
321         CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[j], &vec_j));
322         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[j], &rstr_j));
323         if (rstr_i == rstr_j && vec_i == vec_j) {
324           is_ordered[j]                        = true;
325           impl->output_field_order[curr_index] = j;
326           curr_index++;
327         }
328       }
329     }
330   }
331   CeedCallBackend(CeedOperatorSetSetupDone(op));
332   return CEED_ERROR_SUCCESS;
333 }
334 
335 //------------------------------------------------------------------------------
336 // Restrict Operator Inputs
337 //------------------------------------------------------------------------------
338 static inline int CeedOperatorInputRestrict_Hip(CeedOperatorField op_input_field, CeedQFunctionField qf_input_field, CeedInt input_field,
339                                                 CeedVector in_vec, CeedVector active_e_vec, const bool skip_active, CeedOperator_Hip *impl,
340                                                 CeedRequest *request) {
341   bool       is_active = false;
342   CeedVector l_vec, e_vec = impl->e_vecs_in[input_field];
343 
344   // Get input vector
345   CeedCallBackend(CeedOperatorFieldGetVector(op_input_field, &l_vec));
346   is_active = l_vec == CEED_VECTOR_ACTIVE;
347   if (is_active && skip_active) return CEED_ERROR_SUCCESS;
348   if (is_active) {
349     l_vec = in_vec;
350     if (!e_vec) e_vec = active_e_vec;
351   }
352 
353   // Restriction action
354   if (e_vec) {
355     // Restrict, if necessary
356     if (!impl->skip_rstr_in[input_field]) {
357       uint64_t state;
358 
359       CeedCallBackend(CeedVectorGetState(l_vec, &state));
360       if (is_active || state != impl->input_states[input_field]) {
361         CeedElemRestriction elem_rstr;
362 
363         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_field, &elem_rstr));
364         CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_NOTRANSPOSE, l_vec, e_vec, request));
365       }
366       impl->input_states[input_field] = state;
367     }
368   }
369   return CEED_ERROR_SUCCESS;
370 }
371 
372 //------------------------------------------------------------------------------
373 // Input Basis Action
374 //------------------------------------------------------------------------------
375 static inline int CeedOperatorInputBasis_Hip(CeedOperatorField op_input_field, CeedQFunctionField qf_input_field, CeedInt input_field,
376                                              CeedVector in_vec, CeedVector active_e_vec, CeedInt num_elem, const bool skip_active,
377                                              CeedOperator_Hip *impl) {
378   bool         is_active = false;
379   CeedEvalMode eval_mode;
380   CeedVector   l_vec, e_vec = impl->e_vecs_in[input_field], q_vec = impl->q_vecs_in[input_field];
381 
382   // Skip active input
383   CeedCallBackend(CeedOperatorFieldGetVector(op_input_field, &l_vec));
384   is_active = l_vec == CEED_VECTOR_ACTIVE;
385   if (is_active && skip_active) return CEED_ERROR_SUCCESS;
386   if (is_active) {
387     l_vec = in_vec;
388     if (!e_vec) e_vec = active_e_vec;
389   }
390 
391   // Basis action
392   CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_field, &eval_mode));
393   switch (eval_mode) {
394     case CEED_EVAL_NONE: {
395       const CeedScalar *e_vec_array;
396 
397       if (e_vec) {
398         CeedCallBackend(CeedVectorGetArrayRead(e_vec, CEED_MEM_DEVICE, &e_vec_array));
399       } else {
400         CeedCallBackend(CeedVectorGetArrayRead(l_vec, CEED_MEM_DEVICE, &e_vec_array));
401       }
402       CeedCallBackend(CeedVectorSetArray(q_vec, CEED_MEM_DEVICE, CEED_USE_POINTER, (CeedScalar *)e_vec_array));
403       break;
404     }
405     case CEED_EVAL_INTERP:
406     case CEED_EVAL_GRAD:
407     case CEED_EVAL_DIV:
408     case CEED_EVAL_CURL: {
409       CeedBasis basis;
410 
411       CeedCallBackend(CeedOperatorFieldGetBasis(op_input_field, &basis));
412       CeedCallBackend(CeedBasisApply(basis, num_elem, CEED_NOTRANSPOSE, eval_mode, e_vec, q_vec));
413       break;
414     }
415     case CEED_EVAL_WEIGHT:
416       break;  // No action
417   }
418   return CEED_ERROR_SUCCESS;
419 }
420 
421 //------------------------------------------------------------------------------
422 // Restore Input Vectors
423 //------------------------------------------------------------------------------
424 static inline int CeedOperatorInputRestore_Hip(CeedOperatorField op_input_field, CeedQFunctionField qf_input_field, CeedInt input_field,
425                                                CeedVector in_vec, CeedVector active_e_vec, const bool skip_active, CeedOperator_Hip *impl) {
426   bool         is_active = false;
427   CeedEvalMode eval_mode;
428   CeedVector   l_vec, e_vec = impl->e_vecs_in[input_field];
429 
430   // Skip active input
431   CeedCallBackend(CeedOperatorFieldGetVector(op_input_field, &l_vec));
432   is_active = l_vec == CEED_VECTOR_ACTIVE;
433   if (is_active && skip_active) return CEED_ERROR_SUCCESS;
434   if (is_active) {
435     l_vec = in_vec;
436     if (!e_vec) e_vec = active_e_vec;
437   }
438 
439   // Restore e-vec
440   CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_field, &eval_mode));
441   if (eval_mode == CEED_EVAL_NONE) {
442     const CeedScalar *e_vec_array;
443 
444     CeedCallBackend(CeedVectorTakeArray(impl->q_vecs_in[input_field], CEED_MEM_DEVICE, (CeedScalar **)&e_vec_array));
445     if (e_vec) {
446       CeedCallBackend(CeedVectorRestoreArrayRead(e_vec, &e_vec_array));
447     } else {
448       CeedCallBackend(CeedVectorRestoreArrayRead(l_vec, &e_vec_array));
449     }
450   }
451   return CEED_ERROR_SUCCESS;
452 }
453 
454 //------------------------------------------------------------------------------
455 // Apply and add to output
456 //------------------------------------------------------------------------------
457 static int CeedOperatorApplyAdd_Hip(CeedOperator op, CeedVector in_vec, CeedVector out_vec, CeedRequest *request) {
458   CeedInt             Q, num_elem, num_input_fields, num_output_fields;
459   Ceed                ceed;
460   CeedVector          active_e_vec;
461   CeedQFunctionField *qf_input_fields, *qf_output_fields;
462   CeedQFunction       qf;
463   CeedOperatorField  *op_input_fields, *op_output_fields;
464   CeedOperator_Hip   *impl;
465 
466   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
467   CeedCallBackend(CeedOperatorGetData(op, &impl));
468   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
469   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
470   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
471   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
472   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
473 
474   // Setup
475   CeedCallBackend(CeedOperatorSetup_Hip(op));
476 
477   // Work vector
478   CeedCallBackend(CeedGetWorkVector(ceed, impl->max_active_e_vec_len, &active_e_vec));
479 
480   // Process inputs
481   for (CeedInt i = 0; i < num_input_fields; i++) {
482     CeedInt field = impl->input_field_order[i];
483 
484     CeedCallBackend(CeedOperatorInputRestrict_Hip(op_input_fields[field], qf_input_fields[field], field, in_vec, active_e_vec, false, impl, request));
485     CeedCallBackend(CeedOperatorInputBasis_Hip(op_input_fields[field], qf_input_fields[field], field, in_vec, active_e_vec, num_elem, false, impl));
486   }
487 
488   // Output pointers, as necessary
489   for (CeedInt i = 0; i < num_output_fields; i++) {
490     CeedEvalMode eval_mode;
491 
492     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
493     if (eval_mode == CEED_EVAL_NONE) {
494       CeedScalar *e_vec_array;
495 
496       CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs_out[i], CEED_MEM_DEVICE, &e_vec_array));
497       CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_vec_array));
498     }
499   }
500 
501   // Q function
502   CeedCallBackend(CeedQFunctionApply(qf, num_elem * Q, impl->q_vecs_in, impl->q_vecs_out));
503 
504   // Restore input arrays
505   for (CeedInt i = 0; i < num_input_fields; i++) {
506     CeedCallBackend(CeedOperatorInputRestore_Hip(op_input_fields[i], qf_input_fields[i], i, in_vec, active_e_vec, false, impl));
507   }
508 
509   // Output basis and restriction
510   for (CeedInt i = 0; i < num_output_fields; i++) {
511     bool                is_active = false;
512     CeedInt             field     = impl->output_field_order[i];
513     CeedEvalMode        eval_mode;
514     CeedVector          l_vec, e_vec = impl->e_vecs_out[field], q_vec = impl->q_vecs_out[field];
515     CeedElemRestriction elem_rstr;
516     CeedBasis           basis;
517 
518     // Output vector
519     CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[field], &l_vec));
520     is_active = l_vec == CEED_VECTOR_ACTIVE;
521     if (is_active) {
522       l_vec = out_vec;
523       if (!e_vec) e_vec = active_e_vec;
524     }
525 
526     // Basis action
527     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[field], &eval_mode));
528     switch (eval_mode) {
529       case CEED_EVAL_NONE:
530         break;  // No action
531       case CEED_EVAL_INTERP:
532       case CEED_EVAL_GRAD:
533       case CEED_EVAL_DIV:
534       case CEED_EVAL_CURL:
535         CeedCallBackend(CeedOperatorFieldGetBasis(op_output_fields[field], &basis));
536         if (impl->apply_add_basis_out[field]) {
537           CeedCallBackend(CeedBasisApplyAdd(basis, num_elem, CEED_TRANSPOSE, eval_mode, q_vec, e_vec));
538         } else {
539           CeedCallBackend(CeedBasisApply(basis, num_elem, CEED_TRANSPOSE, eval_mode, q_vec, e_vec));
540         }
541         break;
542       // LCOV_EXCL_START
543       case CEED_EVAL_WEIGHT: {
544         return CeedError(ceed, CEED_ERROR_BACKEND, "CEED_EVAL_WEIGHT cannot be an output evaluation mode");
545         // LCOV_EXCL_STOP
546       }
547     }
548 
549     // Restore evec
550     if (eval_mode == CEED_EVAL_NONE) {
551       CeedScalar *e_vec_array;
552 
553       CeedCallBackend(CeedVectorTakeArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, &e_vec_array));
554       CeedCallBackend(CeedVectorRestoreArray(e_vec, &e_vec_array));
555     }
556 
557     // Restrict
558     if (impl->skip_rstr_out[field]) continue;
559     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[field], &elem_rstr));
560     CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_TRANSPOSE, e_vec, l_vec, request));
561   }
562 
563   // Return work vector
564   CeedCallBackend(CeedRestoreWorkVector(ceed, &active_e_vec));
565   return CEED_ERROR_SUCCESS;
566 }
567 
568 //------------------------------------------------------------------------------
569 // CeedOperator needs to connect all the named fields (be they active or passive) to the named inputs and outputs of its CeedQFunction.
570 //------------------------------------------------------------------------------
571 static int CeedOperatorSetupAtPoints_Hip(CeedOperator op) {
572   Ceed                ceed;
573   bool                is_setup_done;
574   CeedInt             max_num_points = -1, num_elem, num_input_fields, num_output_fields;
575   CeedQFunctionField *qf_input_fields, *qf_output_fields;
576   CeedQFunction       qf;
577   CeedOperatorField  *op_input_fields, *op_output_fields;
578   CeedOperator_Hip   *impl;
579 
580   CeedCallBackend(CeedOperatorIsSetupDone(op, &is_setup_done));
581   if (is_setup_done) return CEED_ERROR_SUCCESS;
582 
583   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
584   CeedCallBackend(CeedOperatorGetData(op, &impl));
585   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
586   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
587   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
588   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
589   {
590     CeedElemRestriction rstr_points = NULL;
591 
592     CeedCallBackend(CeedOperatorAtPointsGetPoints(op, &rstr_points, NULL));
593     CeedCallBackend(CeedElemRestrictionGetMaxPointsInElement(rstr_points, &max_num_points));
594     CeedCallBackend(CeedCalloc(num_elem, &impl->num_points));
595     for (CeedInt e = 0; e < num_elem; e++) {
596       CeedInt num_points_elem;
597 
598       CeedCallBackend(CeedElemRestrictionGetNumPointsInElement(rstr_points, e, &num_points_elem));
599       impl->num_points[e] = num_points_elem;
600     }
601   }
602   impl->max_num_points = max_num_points;
603 
604   // Allocate
605   CeedCallBackend(CeedCalloc(num_input_fields, &impl->e_vecs_in));
606   CeedCallBackend(CeedCalloc(num_output_fields, &impl->e_vecs_out));
607   CeedCallBackend(CeedCalloc(num_input_fields, &impl->skip_rstr_in));
608   CeedCallBackend(CeedCalloc(num_output_fields, &impl->skip_rstr_out));
609   CeedCallBackend(CeedCalloc(num_output_fields, &impl->apply_add_basis_out));
610   CeedCallBackend(CeedCalloc(num_input_fields, &impl->input_field_order));
611   CeedCallBackend(CeedCalloc(num_output_fields, &impl->output_field_order));
612   CeedCallBackend(CeedCalloc(num_input_fields, &impl->input_states));
613   CeedCallBackend(CeedCalloc(num_input_fields, &impl->q_vecs_in));
614   CeedCallBackend(CeedCalloc(num_output_fields, &impl->q_vecs_out));
615   impl->num_inputs  = num_input_fields;
616   impl->num_outputs = num_output_fields;
617 
618   // Set up infield and outfield e-vecs and q-vecs
619   CeedCallBackend(CeedOperatorSetupFields_Hip(qf, op, true, true, impl->skip_rstr_in, NULL, impl->e_vecs_in, impl->q_vecs_in, num_input_fields,
620                                               max_num_points, num_elem));
621   CeedCallBackend(CeedOperatorSetupFields_Hip(qf, op, false, true, impl->skip_rstr_out, impl->apply_add_basis_out, impl->e_vecs_out, impl->q_vecs_out,
622                                               num_output_fields, max_num_points, num_elem));
623 
624   // Reorder fields to allow reuse of buffers
625   impl->max_active_e_vec_len = 0;
626   {
627     bool    is_ordered[CEED_FIELD_MAX];
628     CeedInt curr_index = 0;
629 
630     for (CeedInt i = 0; i < num_input_fields; i++) is_ordered[i] = false;
631     for (CeedInt i = 0; i < num_input_fields; i++) {
632       CeedSize            e_vec_len_i;
633       CeedVector          vec_i;
634       CeedElemRestriction rstr_i;
635 
636       if (is_ordered[i]) continue;
637       is_ordered[i]                       = true;
638       impl->input_field_order[curr_index] = i;
639       curr_index++;
640       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec_i));
641       if (vec_i == CEED_VECTOR_NONE) continue;  // CEED_EVAL_WEIGHT
642       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &rstr_i));
643       CeedCallBackend(CeedElemRestrictionGetEVectorSize(rstr_i, &e_vec_len_i));
644       impl->max_active_e_vec_len = e_vec_len_i > impl->max_active_e_vec_len ? e_vec_len_i : impl->max_active_e_vec_len;
645       for (CeedInt j = i + 1; j < num_input_fields; j++) {
646         CeedVector          vec_j;
647         CeedElemRestriction rstr_j;
648 
649         CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[j], &vec_j));
650         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[j], &rstr_j));
651         if (rstr_i == rstr_j && vec_i == vec_j) {
652           is_ordered[j]                       = true;
653           impl->input_field_order[curr_index] = j;
654           curr_index++;
655         }
656       }
657     }
658   }
659   {
660     bool    is_ordered[CEED_FIELD_MAX];
661     CeedInt curr_index = 0;
662 
663     for (CeedInt i = 0; i < num_output_fields; i++) is_ordered[i] = false;
664     for (CeedInt i = 0; i < num_output_fields; i++) {
665       CeedSize            e_vec_len_i;
666       CeedVector          vec_i;
667       CeedElemRestriction rstr_i;
668 
669       if (is_ordered[i]) continue;
670       is_ordered[i]                        = true;
671       impl->output_field_order[curr_index] = i;
672       curr_index++;
673       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &vec_i));
674       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[i], &rstr_i));
675       CeedCallBackend(CeedElemRestrictionGetEVectorSize(rstr_i, &e_vec_len_i));
676       impl->max_active_e_vec_len = e_vec_len_i > impl->max_active_e_vec_len ? e_vec_len_i : impl->max_active_e_vec_len;
677       for (CeedInt j = i + 1; j < num_output_fields; j++) {
678         CeedVector          vec_j;
679         CeedElemRestriction rstr_j;
680 
681         CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[j], &vec_j));
682         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[j], &rstr_j));
683         if (rstr_i == rstr_j && vec_i == vec_j) {
684           is_ordered[j]                        = true;
685           impl->output_field_order[curr_index] = j;
686           curr_index++;
687         }
688       }
689     }
690   }
691 
692   CeedCallBackend(CeedOperatorSetSetupDone(op));
693   return CEED_ERROR_SUCCESS;
694 }
695 
696 //------------------------------------------------------------------------------
697 // Input Basis Action AtPoints
698 //------------------------------------------------------------------------------
699 static inline int CeedOperatorInputBasisAtPoints_Hip(CeedOperatorField op_input_field, CeedQFunctionField qf_input_field, CeedInt input_field,
700                                                      CeedVector in_vec, CeedVector active_e_vec, CeedInt num_elem, const CeedInt *num_points,
701                                                      const bool skip_active, CeedOperator_Hip *impl) {
702   bool         is_active = false;
703   CeedEvalMode eval_mode;
704   CeedVector   l_vec, e_vec = impl->e_vecs_in[input_field], q_vec = impl->q_vecs_in[input_field];
705 
706   // Skip active input
707   CeedCallBackend(CeedOperatorFieldGetVector(op_input_field, &l_vec));
708   is_active = l_vec == CEED_VECTOR_ACTIVE;
709   if (is_active && skip_active) return CEED_ERROR_SUCCESS;
710   if (is_active) {
711     l_vec = in_vec;
712     if (!e_vec) e_vec = active_e_vec;
713   }
714 
715   // Basis action
716   CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_field, &eval_mode));
717   switch (eval_mode) {
718     case CEED_EVAL_NONE: {
719       const CeedScalar *e_vec_array;
720 
721       if (e_vec) {
722         CeedCallBackend(CeedVectorGetArrayRead(e_vec, CEED_MEM_DEVICE, &e_vec_array));
723       } else {
724         CeedCallBackend(CeedVectorGetArrayRead(l_vec, CEED_MEM_DEVICE, &e_vec_array));
725       }
726       CeedCallBackend(CeedVectorSetArray(q_vec, CEED_MEM_DEVICE, CEED_USE_POINTER, (CeedScalar *)e_vec_array));
727       break;
728     }
729     case CEED_EVAL_INTERP:
730     case CEED_EVAL_GRAD:
731     case CEED_EVAL_DIV:
732     case CEED_EVAL_CURL: {
733       CeedBasis basis;
734 
735       CeedCallBackend(CeedOperatorFieldGetBasis(op_input_field, &basis));
736       CeedCallBackend(CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_NOTRANSPOSE, eval_mode, impl->point_coords_elem, e_vec, q_vec));
737       break;
738     }
739     case CEED_EVAL_WEIGHT:
740       break;  // No action
741   }
742   return CEED_ERROR_SUCCESS;
743 }
744 
745 //------------------------------------------------------------------------------
746 // Apply and add to output AtPoints
747 //------------------------------------------------------------------------------
748 static int CeedOperatorApplyAddAtPoints_Hip(CeedOperator op, CeedVector in_vec, CeedVector out_vec, CeedRequest *request) {
749   CeedInt             max_num_points, *num_points, num_elem, num_input_fields, num_output_fields;
750   Ceed                ceed;
751   CeedVector          active_e_vec;
752   CeedQFunctionField *qf_input_fields, *qf_output_fields;
753   CeedQFunction       qf;
754   CeedOperatorField  *op_input_fields, *op_output_fields;
755   CeedOperator_Hip   *impl;
756 
757   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
758   CeedCallBackend(CeedOperatorGetData(op, &impl));
759   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
760   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
761   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
762   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
763 
764   // Setup
765   CeedCallBackend(CeedOperatorSetupAtPoints_Hip(op));
766   num_points     = impl->num_points;
767   max_num_points = impl->max_num_points;
768 
769   // Work vector
770   CeedCallBackend(CeedGetWorkVector(ceed, impl->max_active_e_vec_len, &active_e_vec));
771 
772   // Get point coordinates
773   if (!impl->point_coords_elem) {
774     CeedVector          point_coords = NULL;
775     CeedElemRestriction rstr_points  = NULL;
776 
777     CeedCallBackend(CeedOperatorAtPointsGetPoints(op, &rstr_points, &point_coords));
778     CeedCallBackend(CeedElemRestrictionCreateVector(rstr_points, NULL, &impl->point_coords_elem));
779     CeedCallBackend(CeedElemRestrictionApply(rstr_points, CEED_NOTRANSPOSE, point_coords, impl->point_coords_elem, request));
780   }
781 
782   // Process inputs
783   for (CeedInt i = 0; i < num_input_fields; i++) {
784     CeedInt field = impl->input_field_order[i];
785 
786     CeedCallBackend(CeedOperatorInputRestrict_Hip(op_input_fields[field], qf_input_fields[field], field, in_vec, active_e_vec, false, impl, request));
787     CeedCallBackend(CeedOperatorInputBasisAtPoints_Hip(op_input_fields[field], qf_input_fields[field], field, in_vec, active_e_vec, num_elem,
788                                                        num_points, false, impl));
789   }
790 
791   // Output pointers, as necessary
792   for (CeedInt i = 0; i < num_output_fields; i++) {
793     CeedEvalMode eval_mode;
794 
795     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
796     if (eval_mode == CEED_EVAL_NONE) {
797       CeedScalar *e_vec_array;
798 
799       CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs_out[i], CEED_MEM_DEVICE, &e_vec_array));
800       CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_vec_array));
801     }
802   }
803 
804   // Q function
805   CeedCallBackend(CeedQFunctionApply(qf, num_elem * max_num_points, impl->q_vecs_in, impl->q_vecs_out));
806 
807   // Restore input arrays
808   for (CeedInt i = 0; i < num_input_fields; i++) {
809     CeedCallBackend(CeedOperatorInputRestore_Hip(op_input_fields[i], qf_input_fields[i], i, in_vec, active_e_vec, false, impl));
810   }
811 
812   // Output basis and restriction
813   for (CeedInt i = 0; i < num_output_fields; i++) {
814     bool                is_active = false;
815     CeedInt             field     = impl->output_field_order[i];
816     CeedEvalMode        eval_mode;
817     CeedVector          l_vec, e_vec = impl->e_vecs_out[field], q_vec = impl->q_vecs_out[field];
818     CeedElemRestriction elem_rstr;
819     CeedBasis           basis;
820 
821     // Output vector
822     CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[field], &l_vec));
823     is_active = l_vec == CEED_VECTOR_ACTIVE;
824     if (is_active) {
825       l_vec = out_vec;
826       if (!e_vec) e_vec = active_e_vec;
827     }
828 
829     // Basis action
830     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[field], &eval_mode));
831     switch (eval_mode) {
832       case CEED_EVAL_NONE:
833         break;  // No action
834       case CEED_EVAL_INTERP:
835       case CEED_EVAL_GRAD:
836       case CEED_EVAL_DIV:
837       case CEED_EVAL_CURL:
838         CeedCallBackend(CeedOperatorFieldGetBasis(op_output_fields[field], &basis));
839         if (impl->apply_add_basis_out[field]) {
840           CeedCallBackend(CeedBasisApplyAddAtPoints(basis, num_elem, num_points, CEED_TRANSPOSE, eval_mode, impl->point_coords_elem, q_vec, e_vec));
841         } else {
842           CeedCallBackend(CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_TRANSPOSE, eval_mode, impl->point_coords_elem, q_vec, e_vec));
843         }
844         break;
845       // LCOV_EXCL_START
846       case CEED_EVAL_WEIGHT: {
847         return CeedError(ceed, CEED_ERROR_BACKEND, "CEED_EVAL_WEIGHT cannot be an output evaluation mode");
848         // LCOV_EXCL_STOP
849       }
850     }
851 
852     // Restore evec
853     if (eval_mode == CEED_EVAL_NONE) {
854       CeedScalar *e_vec_array;
855 
856       CeedCallBackend(CeedVectorTakeArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, &e_vec_array));
857       CeedCallBackend(CeedVectorRestoreArray(e_vec, &e_vec_array));
858     }
859 
860     // Restrict
861     if (impl->skip_rstr_out[field]) continue;
862     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[field], &elem_rstr));
863     CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_TRANSPOSE, e_vec, l_vec, request));
864   }
865 
866   // Restore work vector
867   CeedCallBackend(CeedRestoreWorkVector(ceed, &active_e_vec));
868   return CEED_ERROR_SUCCESS;
869 }
870 
871 //------------------------------------------------------------------------------
872 // Linear QFunction Assembly Core
873 //------------------------------------------------------------------------------
874 static inline int CeedOperatorLinearAssembleQFunctionCore_Hip(CeedOperator op, bool build_objects, CeedVector *assembled, CeedElemRestriction *rstr,
875                                                               CeedRequest *request) {
876   Ceed                ceed, ceed_parent;
877   CeedInt             num_active_in, num_active_out, Q, num_elem, num_input_fields, num_output_fields, size;
878   CeedScalar         *assembled_array;
879   CeedVector         *active_inputs;
880   CeedQFunctionField *qf_input_fields, *qf_output_fields;
881   CeedQFunction       qf;
882   CeedOperatorField  *op_input_fields, *op_output_fields;
883   CeedOperator_Hip   *impl;
884 
885   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
886   CeedCallBackend(CeedOperatorGetFallbackParentCeed(op, &ceed_parent));
887   CeedCallBackend(CeedOperatorGetData(op, &impl));
888   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
889   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
890   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
891   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
892   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
893   active_inputs = impl->qf_active_in;
894   num_active_in = impl->num_active_in, num_active_out = impl->num_active_out;
895 
896   // Setup
897   CeedCallBackend(CeedOperatorSetup_Hip(op));
898 
899   // Process inputs
900   for (CeedInt i = 0; i < num_input_fields; i++) {
901     CeedCallBackend(CeedOperatorInputRestrict_Hip(op_input_fields[i], qf_input_fields[i], i, NULL, NULL, true, impl, request));
902     CeedCallBackend(CeedOperatorInputBasis_Hip(op_input_fields[i], qf_input_fields[i], i, NULL, NULL, num_elem, true, impl));
903   }
904 
905   // Count number of active input fields
906   if (!num_active_in) {
907     for (CeedInt i = 0; i < num_input_fields; i++) {
908       CeedScalar *q_vec_array;
909       CeedVector  l_vec;
910 
911       // Check if active input
912       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &l_vec));
913       if (l_vec == CEED_VECTOR_ACTIVE) {
914         CeedCallBackend(CeedQFunctionFieldGetSize(qf_input_fields[i], &size));
915         CeedCallBackend(CeedVectorSetValue(impl->q_vecs_in[i], 0.0));
916         CeedCallBackend(CeedVectorGetArray(impl->q_vecs_in[i], CEED_MEM_DEVICE, &q_vec_array));
917         CeedCallBackend(CeedRealloc(num_active_in + size, &active_inputs));
918         for (CeedInt field = 0; field < size; field++) {
919           CeedSize q_size = (CeedSize)Q * num_elem;
920 
921           CeedCallBackend(CeedVectorCreate(ceed, q_size, &active_inputs[num_active_in + field]));
922           CeedCallBackend(
923               CeedVectorSetArray(active_inputs[num_active_in + field], CEED_MEM_DEVICE, CEED_USE_POINTER, &q_vec_array[field * Q * num_elem]));
924         }
925         num_active_in += size;
926         CeedCallBackend(CeedVectorRestoreArray(impl->q_vecs_in[i], &q_vec_array));
927       }
928     }
929     impl->num_active_in = num_active_in;
930     impl->qf_active_in  = active_inputs;
931   }
932 
933   // Count number of active output fields
934   if (!num_active_out) {
935     for (CeedInt i = 0; i < num_output_fields; i++) {
936       CeedVector l_vec;
937 
938       // Check if active output
939       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &l_vec));
940       if (l_vec == CEED_VECTOR_ACTIVE) {
941         CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[i], &size));
942         num_active_out += size;
943       }
944     }
945     impl->num_active_out = num_active_out;
946   }
947 
948   // Check sizes
949   CeedCheck(num_active_in > 0 && num_active_out > 0, ceed, CEED_ERROR_BACKEND, "Cannot assemble QFunction without active inputs and outputs");
950 
951   // Build objects if needed
952   if (build_objects) {
953     CeedSize l_size     = (CeedSize)num_elem * Q * num_active_in * num_active_out;
954     CeedInt  strides[3] = {1, num_elem * Q, Q}; /* *NOPAD* */
955 
956     // Create output restriction
957     CeedCallBackend(CeedElemRestrictionCreateStrided(ceed_parent, num_elem, Q, num_active_in * num_active_out,
958                                                      (CeedSize)num_active_in * (CeedSize)num_active_out * (CeedSize)num_elem * (CeedSize)Q, strides,
959                                                      rstr));
960     // Create assembled vector
961     CeedCallBackend(CeedVectorCreate(ceed_parent, l_size, assembled));
962   }
963   CeedCallBackend(CeedVectorSetValue(*assembled, 0.0));
964   CeedCallBackend(CeedVectorGetArray(*assembled, CEED_MEM_DEVICE, &assembled_array));
965 
966   // Assemble QFunction
967   for (CeedInt in = 0; in < num_active_in; in++) {
968     // Set Inputs
969     CeedCallBackend(CeedVectorSetValue(active_inputs[in], 1.0));
970     if (num_active_in > 1) {
971       CeedCallBackend(CeedVectorSetValue(active_inputs[(in + num_active_in - 1) % num_active_in], 0.0));
972     }
973     // Set Outputs
974     for (CeedInt out = 0; out < num_output_fields; out++) {
975       CeedVector l_vec;
976 
977       // Get output vector
978       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[out], &l_vec));
979       // Check if active output
980       if (l_vec == CEED_VECTOR_ACTIVE) {
981         CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[out], CEED_MEM_DEVICE, CEED_USE_POINTER, assembled_array));
982         CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[out], &size));
983         assembled_array += size * Q * num_elem;  // Advance the pointer by the size of the output
984       }
985     }
986     // Apply QFunction
987     CeedCallBackend(CeedQFunctionApply(qf, Q * num_elem, impl->q_vecs_in, impl->q_vecs_out));
988   }
989 
990   // Un-set output q-vecs to prevent accidental overwrite of Assembled
991   for (CeedInt out = 0; out < num_output_fields; out++) {
992     CeedVector l_vec;
993 
994     CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[out], &l_vec));
995     if (l_vec == CEED_VECTOR_ACTIVE) {
996       CeedCallBackend(CeedVectorTakeArray(impl->q_vecs_out[out], CEED_MEM_DEVICE, NULL));
997     }
998   }
999 
1000   // Restore input arrays
1001   for (CeedInt i = 0; i < num_input_fields; i++) {
1002     CeedCallBackend(CeedOperatorInputRestore_Hip(op_input_fields[i], qf_input_fields[i], i, NULL, NULL, true, impl));
1003   }
1004 
1005   // Restore output
1006   CeedCallBackend(CeedVectorRestoreArray(*assembled, &assembled_array));
1007   return CEED_ERROR_SUCCESS;
1008 }
1009 
1010 //------------------------------------------------------------------------------
1011 // Assemble Linear QFunction
1012 //------------------------------------------------------------------------------
1013 static int CeedOperatorLinearAssembleQFunction_Hip(CeedOperator op, CeedVector *assembled, CeedElemRestriction *rstr, CeedRequest *request) {
1014   return CeedOperatorLinearAssembleQFunctionCore_Hip(op, true, assembled, rstr, request);
1015 }
1016 
1017 //------------------------------------------------------------------------------
1018 // Update Assembled Linear QFunction
1019 //------------------------------------------------------------------------------
1020 static int CeedOperatorLinearAssembleQFunctionUpdate_Hip(CeedOperator op, CeedVector assembled, CeedElemRestriction rstr, CeedRequest *request) {
1021   return CeedOperatorLinearAssembleQFunctionCore_Hip(op, false, &assembled, &rstr, request);
1022 }
1023 
1024 //------------------------------------------------------------------------------
1025 // Assemble Diagonal Setup
1026 //------------------------------------------------------------------------------
1027 static inline int CeedOperatorAssembleDiagonalSetup_Hip(CeedOperator op) {
1028   Ceed                ceed;
1029   CeedInt             num_input_fields, num_output_fields, num_eval_modes_in = 0, num_eval_modes_out = 0;
1030   CeedInt             q_comp, num_nodes, num_qpts;
1031   CeedEvalMode       *eval_modes_in = NULL, *eval_modes_out = NULL;
1032   CeedBasis           basis_in = NULL, basis_out = NULL;
1033   CeedQFunctionField *qf_fields;
1034   CeedQFunction       qf;
1035   CeedOperatorField  *op_fields;
1036   CeedOperator_Hip   *impl;
1037 
1038   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1039   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
1040   CeedCallBackend(CeedQFunctionGetNumArgs(qf, &num_input_fields, &num_output_fields));
1041 
1042   // Determine active input basis
1043   CeedCallBackend(CeedOperatorGetFields(op, NULL, &op_fields, NULL, NULL));
1044   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
1045   for (CeedInt i = 0; i < num_input_fields; i++) {
1046     CeedVector vec;
1047 
1048     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
1049     if (vec == CEED_VECTOR_ACTIVE) {
1050       CeedBasis    basis;
1051       CeedEvalMode eval_mode;
1052 
1053       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
1054       CeedCheck(!basis_in || basis_in == basis, ceed, CEED_ERROR_BACKEND,
1055                 "Backend does not implement operator diagonal assembly with multiple active bases");
1056       basis_in = basis;
1057       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1058       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_mode, &q_comp));
1059       if (eval_mode != CEED_EVAL_WEIGHT) {
1060         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF assembly
1061         CeedCallBackend(CeedRealloc(num_eval_modes_in + q_comp, &eval_modes_in));
1062         for (CeedInt d = 0; d < q_comp; d++) eval_modes_in[num_eval_modes_in + d] = eval_mode;
1063         num_eval_modes_in += q_comp;
1064       }
1065     }
1066   }
1067 
1068   // Determine active output basis
1069   CeedCallBackend(CeedOperatorGetFields(op, NULL, NULL, NULL, &op_fields));
1070   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
1071   for (CeedInt i = 0; i < num_output_fields; i++) {
1072     CeedVector vec;
1073 
1074     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
1075     if (vec == CEED_VECTOR_ACTIVE) {
1076       CeedBasis    basis;
1077       CeedEvalMode eval_mode;
1078 
1079       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
1080       CeedCheck(!basis_out || basis_out == basis, ceed, CEED_ERROR_BACKEND,
1081                 "Backend does not implement operator diagonal assembly with multiple active bases");
1082       basis_out = basis;
1083       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1084       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_mode, &q_comp));
1085       if (eval_mode != CEED_EVAL_WEIGHT) {
1086         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF assembly
1087         CeedCallBackend(CeedRealloc(num_eval_modes_out + q_comp, &eval_modes_out));
1088         for (CeedInt d = 0; d < q_comp; d++) eval_modes_out[num_eval_modes_out + d] = eval_mode;
1089         num_eval_modes_out += q_comp;
1090       }
1091     }
1092   }
1093 
1094   // Operator data struct
1095   CeedCallBackend(CeedOperatorGetData(op, &impl));
1096   CeedCallBackend(CeedCalloc(1, &impl->diag));
1097   CeedOperatorDiag_Hip *diag = impl->diag;
1098 
1099   // Basis matrices
1100   CeedCallBackend(CeedBasisGetNumNodes(basis_in, &num_nodes));
1101   if (basis_in == CEED_BASIS_NONE) num_qpts = num_nodes;
1102   else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_in, &num_qpts));
1103   const CeedInt interp_bytes     = num_nodes * num_qpts * sizeof(CeedScalar);
1104   const CeedInt eval_modes_bytes = sizeof(CeedEvalMode);
1105   bool          has_eval_none    = false;
1106 
1107   // CEED_EVAL_NONE
1108   for (CeedInt i = 0; i < num_eval_modes_in; i++) has_eval_none = has_eval_none || (eval_modes_in[i] == CEED_EVAL_NONE);
1109   for (CeedInt i = 0; i < num_eval_modes_out; i++) has_eval_none = has_eval_none || (eval_modes_out[i] == CEED_EVAL_NONE);
1110   if (has_eval_none) {
1111     CeedScalar *identity = NULL;
1112 
1113     CeedCallBackend(CeedCalloc(num_nodes * num_qpts, &identity));
1114     for (CeedInt i = 0; i < (num_nodes < num_qpts ? num_nodes : num_qpts); i++) identity[i * num_nodes + i] = 1.0;
1115     CeedCallHip(ceed, hipMalloc((void **)&diag->d_identity, interp_bytes));
1116     CeedCallHip(ceed, hipMemcpy(diag->d_identity, identity, interp_bytes, hipMemcpyHostToDevice));
1117     CeedCallBackend(CeedFree(&identity));
1118   }
1119 
1120   // CEED_EVAL_INTERP, CEED_EVAL_GRAD, CEED_EVAL_DIV, and CEED_EVAL_CURL
1121   for (CeedInt in = 0; in < 2; in++) {
1122     CeedFESpace fespace;
1123     CeedBasis   basis = in ? basis_in : basis_out;
1124 
1125     CeedCallBackend(CeedBasisGetFESpace(basis, &fespace));
1126     switch (fespace) {
1127       case CEED_FE_SPACE_H1: {
1128         CeedInt           q_comp_interp, q_comp_grad;
1129         const CeedScalar *interp, *grad;
1130         CeedScalar       *d_interp, *d_grad;
1131 
1132         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_INTERP, &q_comp_interp));
1133         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_GRAD, &q_comp_grad));
1134 
1135         CeedCallBackend(CeedBasisGetInterp(basis, &interp));
1136         CeedCallHip(ceed, hipMalloc((void **)&d_interp, interp_bytes * q_comp_interp));
1137         CeedCallHip(ceed, hipMemcpy(d_interp, interp, interp_bytes * q_comp_interp, hipMemcpyHostToDevice));
1138         CeedCallBackend(CeedBasisGetGrad(basis, &grad));
1139         CeedCallHip(ceed, hipMalloc((void **)&d_grad, interp_bytes * q_comp_grad));
1140         CeedCallHip(ceed, hipMemcpy(d_grad, grad, interp_bytes * q_comp_grad, hipMemcpyHostToDevice));
1141         if (in) {
1142           diag->d_interp_in = d_interp;
1143           diag->d_grad_in   = d_grad;
1144         } else {
1145           diag->d_interp_out = d_interp;
1146           diag->d_grad_out   = d_grad;
1147         }
1148       } break;
1149       case CEED_FE_SPACE_HDIV: {
1150         CeedInt           q_comp_interp, q_comp_div;
1151         const CeedScalar *interp, *div;
1152         CeedScalar       *d_interp, *d_div;
1153 
1154         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_INTERP, &q_comp_interp));
1155         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_DIV, &q_comp_div));
1156 
1157         CeedCallBackend(CeedBasisGetInterp(basis, &interp));
1158         CeedCallHip(ceed, hipMalloc((void **)&d_interp, interp_bytes * q_comp_interp));
1159         CeedCallHip(ceed, hipMemcpy(d_interp, interp, interp_bytes * q_comp_interp, hipMemcpyHostToDevice));
1160         CeedCallBackend(CeedBasisGetDiv(basis, &div));
1161         CeedCallHip(ceed, hipMalloc((void **)&d_div, interp_bytes * q_comp_div));
1162         CeedCallHip(ceed, hipMemcpy(d_div, div, interp_bytes * q_comp_div, hipMemcpyHostToDevice));
1163         if (in) {
1164           diag->d_interp_in = d_interp;
1165           diag->d_div_in    = d_div;
1166         } else {
1167           diag->d_interp_out = d_interp;
1168           diag->d_div_out    = d_div;
1169         }
1170       } break;
1171       case CEED_FE_SPACE_HCURL: {
1172         CeedInt           q_comp_interp, q_comp_curl;
1173         const CeedScalar *interp, *curl;
1174         CeedScalar       *d_interp, *d_curl;
1175 
1176         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_INTERP, &q_comp_interp));
1177         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_CURL, &q_comp_curl));
1178 
1179         CeedCallBackend(CeedBasisGetInterp(basis, &interp));
1180         CeedCallHip(ceed, hipMalloc((void **)&d_interp, interp_bytes * q_comp_interp));
1181         CeedCallHip(ceed, hipMemcpy(d_interp, interp, interp_bytes * q_comp_interp, hipMemcpyHostToDevice));
1182         CeedCallBackend(CeedBasisGetCurl(basis, &curl));
1183         CeedCallHip(ceed, hipMalloc((void **)&d_curl, interp_bytes * q_comp_curl));
1184         CeedCallHip(ceed, hipMemcpy(d_curl, curl, interp_bytes * q_comp_curl, hipMemcpyHostToDevice));
1185         if (in) {
1186           diag->d_interp_in = d_interp;
1187           diag->d_curl_in   = d_curl;
1188         } else {
1189           diag->d_interp_out = d_interp;
1190           diag->d_curl_out   = d_curl;
1191         }
1192       } break;
1193     }
1194   }
1195 
1196   // Arrays of eval_modes
1197   CeedCallHip(ceed, hipMalloc((void **)&diag->d_eval_modes_in, num_eval_modes_in * eval_modes_bytes));
1198   CeedCallHip(ceed, hipMemcpy(diag->d_eval_modes_in, eval_modes_in, num_eval_modes_in * eval_modes_bytes, hipMemcpyHostToDevice));
1199   CeedCallHip(ceed, hipMalloc((void **)&diag->d_eval_modes_out, num_eval_modes_out * eval_modes_bytes));
1200   CeedCallHip(ceed, hipMemcpy(diag->d_eval_modes_out, eval_modes_out, num_eval_modes_out * eval_modes_bytes, hipMemcpyHostToDevice));
1201   CeedCallBackend(CeedFree(&eval_modes_in));
1202   CeedCallBackend(CeedFree(&eval_modes_out));
1203   return CEED_ERROR_SUCCESS;
1204 }
1205 
1206 //------------------------------------------------------------------------------
1207 // Assemble Diagonal Setup (Compilation)
1208 //------------------------------------------------------------------------------
1209 static inline int CeedOperatorAssembleDiagonalSetupCompile_Hip(CeedOperator op, CeedInt use_ceedsize_idx, const bool is_point_block) {
1210   Ceed                ceed;
1211   char               *diagonal_kernel_source;
1212   const char         *diagonal_kernel_path;
1213   CeedInt             num_input_fields, num_output_fields, num_eval_modes_in = 0, num_eval_modes_out = 0;
1214   CeedInt             num_comp, q_comp, num_nodes, num_qpts;
1215   CeedBasis           basis_in = NULL, basis_out = NULL;
1216   CeedQFunctionField *qf_fields;
1217   CeedQFunction       qf;
1218   CeedOperatorField  *op_fields;
1219   CeedOperator_Hip   *impl;
1220 
1221   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1222   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
1223   CeedCallBackend(CeedQFunctionGetNumArgs(qf, &num_input_fields, &num_output_fields));
1224 
1225   // Determine active input basis
1226   CeedCallBackend(CeedOperatorGetFields(op, NULL, &op_fields, NULL, NULL));
1227   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
1228   for (CeedInt i = 0; i < num_input_fields; i++) {
1229     CeedVector vec;
1230 
1231     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
1232     if (vec == CEED_VECTOR_ACTIVE) {
1233       CeedEvalMode eval_mode;
1234 
1235       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis_in));
1236       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1237       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_mode, &q_comp));
1238       if (eval_mode != CEED_EVAL_WEIGHT) {
1239         num_eval_modes_in += q_comp;
1240       }
1241     }
1242   }
1243 
1244   // Determine active output basis
1245   CeedCallBackend(CeedOperatorGetFields(op, NULL, NULL, NULL, &op_fields));
1246   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
1247   for (CeedInt i = 0; i < num_output_fields; i++) {
1248     CeedVector vec;
1249 
1250     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
1251     if (vec == CEED_VECTOR_ACTIVE) {
1252       CeedEvalMode eval_mode;
1253 
1254       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis_out));
1255       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1256       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_mode, &q_comp));
1257       if (eval_mode != CEED_EVAL_WEIGHT) {
1258         num_eval_modes_out += q_comp;
1259       }
1260     }
1261   }
1262 
1263   // Operator data struct
1264   CeedCallBackend(CeedOperatorGetData(op, &impl));
1265   CeedOperatorDiag_Hip *diag = impl->diag;
1266 
1267   // Assemble kernel
1268   hipModule_t *module          = is_point_block ? &diag->module_point_block : &diag->module;
1269   CeedInt      elems_per_block = 1;
1270   CeedCallBackend(CeedBasisGetNumNodes(basis_in, &num_nodes));
1271   CeedCallBackend(CeedBasisGetNumComponents(basis_in, &num_comp));
1272   if (basis_in == CEED_BASIS_NONE) num_qpts = num_nodes;
1273   else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_in, &num_qpts));
1274   CeedCallBackend(CeedGetJitAbsolutePath(ceed, "ceed/jit-source/hip/hip-ref-operator-assemble-diagonal.h", &diagonal_kernel_path));
1275   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Diagonal Assembly Kernel Source -----\n");
1276   CeedCallBackend(CeedLoadSourceToBuffer(ceed, diagonal_kernel_path, &diagonal_kernel_source));
1277   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Diagonal Assembly Source Complete! -----\n");
1278   CeedCallHip(ceed, CeedCompile_Hip(ceed, diagonal_kernel_source, module, 8, "NUM_EVAL_MODES_IN", num_eval_modes_in, "NUM_EVAL_MODES_OUT",
1279                                     num_eval_modes_out, "NUM_COMP", num_comp, "NUM_NODES", num_nodes, "NUM_QPTS", num_qpts, "USE_CEEDSIZE",
1280                                     use_ceedsize_idx, "USE_POINT_BLOCK", is_point_block ? 1 : 0, "BLOCK_SIZE", num_nodes * elems_per_block));
1281   CeedCallHip(ceed, CeedGetKernel_Hip(ceed, *module, "LinearDiagonal", is_point_block ? &diag->LinearPointBlock : &diag->LinearDiagonal));
1282   CeedCallBackend(CeedFree(&diagonal_kernel_path));
1283   CeedCallBackend(CeedFree(&diagonal_kernel_source));
1284   return CEED_ERROR_SUCCESS;
1285 }
1286 
1287 //------------------------------------------------------------------------------
1288 // Assemble Diagonal Core
1289 //------------------------------------------------------------------------------
1290 static inline int CeedOperatorAssembleDiagonalCore_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request, const bool is_point_block) {
1291   Ceed                ceed;
1292   CeedInt             num_elem, num_nodes;
1293   CeedScalar         *elem_diag_array;
1294   const CeedScalar   *assembled_qf_array;
1295   CeedVector          assembled_qf   = NULL, elem_diag;
1296   CeedElemRestriction assembled_rstr = NULL, rstr_in, rstr_out, diag_rstr;
1297   CeedOperator_Hip   *impl;
1298 
1299   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1300   CeedCallBackend(CeedOperatorGetData(op, &impl));
1301 
1302   // Assemble QFunction
1303   CeedCallBackend(CeedOperatorLinearAssembleQFunctionBuildOrUpdate(op, &assembled_qf, &assembled_rstr, request));
1304   CeedCallBackend(CeedElemRestrictionDestroy(&assembled_rstr));
1305   CeedCallBackend(CeedVectorGetArrayRead(assembled_qf, CEED_MEM_DEVICE, &assembled_qf_array));
1306 
1307   // Setup
1308   if (!impl->diag) CeedCallBackend(CeedOperatorAssembleDiagonalSetup_Hip(op));
1309   CeedOperatorDiag_Hip *diag = impl->diag;
1310 
1311   assert(diag != NULL);
1312 
1313   // Assemble kernel if needed
1314   if ((!is_point_block && !diag->LinearDiagonal) || (is_point_block && !diag->LinearPointBlock)) {
1315     CeedSize assembled_length, assembled_qf_length;
1316     CeedInt  use_ceedsize_idx = 0;
1317     CeedCallBackend(CeedVectorGetLength(assembled, &assembled_length));
1318     CeedCallBackend(CeedVectorGetLength(assembled_qf, &assembled_qf_length));
1319     if ((assembled_length > INT_MAX) || (assembled_qf_length > INT_MAX)) use_ceedsize_idx = 1;
1320 
1321     CeedCallBackend(CeedOperatorAssembleDiagonalSetupCompile_Hip(op, use_ceedsize_idx, is_point_block));
1322   }
1323 
1324   // Restriction and diagonal vector
1325   CeedCallBackend(CeedOperatorGetActiveElemRestrictions(op, &rstr_in, &rstr_out));
1326   CeedCheck(rstr_in == rstr_out, ceed, CEED_ERROR_BACKEND,
1327             "Cannot assemble operator diagonal with different input and output active element restrictions");
1328   if (!is_point_block && !diag->diag_rstr) {
1329     CeedCallBackend(CeedElemRestrictionCreateUnsignedCopy(rstr_out, &diag->diag_rstr));
1330     CeedCallBackend(CeedElemRestrictionCreateVector(diag->diag_rstr, NULL, &diag->elem_diag));
1331   } else if (is_point_block && !diag->point_block_diag_rstr) {
1332     CeedCallBackend(CeedOperatorCreateActivePointBlockRestriction(rstr_out, &diag->point_block_diag_rstr));
1333     CeedCallBackend(CeedElemRestrictionCreateVector(diag->point_block_diag_rstr, NULL, &diag->point_block_elem_diag));
1334   }
1335   diag_rstr = is_point_block ? diag->point_block_diag_rstr : diag->diag_rstr;
1336   elem_diag = is_point_block ? diag->point_block_elem_diag : diag->elem_diag;
1337   CeedCallBackend(CeedVectorSetValue(elem_diag, 0.0));
1338 
1339   // Only assemble diagonal if the basis has nodes, otherwise inputs are null pointers
1340   CeedCallBackend(CeedElemRestrictionGetElementSize(diag_rstr, &num_nodes));
1341   if (num_nodes > 0) {
1342     // Assemble element operator diagonals
1343     CeedCallBackend(CeedElemRestrictionGetNumElements(diag_rstr, &num_elem));
1344     CeedCallBackend(CeedVectorGetArray(elem_diag, CEED_MEM_DEVICE, &elem_diag_array));
1345 
1346     // Compute the diagonal of B^T D B
1347     CeedInt elems_per_block = 1;
1348     CeedInt grid            = CeedDivUpInt(num_elem, elems_per_block);
1349     void   *args[]          = {(void *)&num_elem,      &diag->d_identity,       &diag->d_interp_in,  &diag->d_grad_in, &diag->d_div_in,
1350                                &diag->d_curl_in,       &diag->d_interp_out,     &diag->d_grad_out,   &diag->d_div_out, &diag->d_curl_out,
1351                                &diag->d_eval_modes_in, &diag->d_eval_modes_out, &assembled_qf_array, &elem_diag_array};
1352 
1353     if (is_point_block) {
1354       CeedCallBackend(CeedRunKernelDim_Hip(ceed, diag->LinearPointBlock, grid, num_nodes, 1, elems_per_block, args));
1355     } else {
1356       CeedCallBackend(CeedRunKernelDim_Hip(ceed, diag->LinearDiagonal, grid, num_nodes, 1, elems_per_block, args));
1357     }
1358 
1359     // Restore arrays
1360     CeedCallBackend(CeedVectorRestoreArray(elem_diag, &elem_diag_array));
1361     CeedCallBackend(CeedVectorRestoreArrayRead(assembled_qf, &assembled_qf_array));
1362   }
1363 
1364   // Assemble local operator diagonal
1365   CeedCallBackend(CeedElemRestrictionApply(diag_rstr, CEED_TRANSPOSE, elem_diag, assembled, request));
1366 
1367   // Cleanup
1368   CeedCallBackend(CeedVectorDestroy(&assembled_qf));
1369   return CEED_ERROR_SUCCESS;
1370 }
1371 
1372 //------------------------------------------------------------------------------
1373 // Assemble Linear Diagonal
1374 //------------------------------------------------------------------------------
1375 static int CeedOperatorLinearAssembleAddDiagonal_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request) {
1376   CeedCallBackend(CeedOperatorAssembleDiagonalCore_Hip(op, assembled, request, false));
1377   return CEED_ERROR_SUCCESS;
1378 }
1379 
1380 //------------------------------------------------------------------------------
1381 // Assemble Linear Point Block Diagonal
1382 //------------------------------------------------------------------------------
1383 static int CeedOperatorLinearAssembleAddPointBlockDiagonal_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request) {
1384   CeedCallBackend(CeedOperatorAssembleDiagonalCore_Hip(op, assembled, request, true));
1385   return CEED_ERROR_SUCCESS;
1386 }
1387 
1388 //------------------------------------------------------------------------------
1389 // Single Operator Assembly Setup
1390 //------------------------------------------------------------------------------
1391 static int CeedSingleOperatorAssembleSetup_Hip(CeedOperator op, CeedInt use_ceedsize_idx) {
1392   Ceed                ceed;
1393   Ceed_Hip           *Hip_data;
1394   char               *assembly_kernel_source;
1395   const char         *assembly_kernel_path;
1396   CeedInt             num_input_fields, num_output_fields, num_eval_modes_in = 0, num_eval_modes_out = 0;
1397   CeedInt             elem_size_in, num_qpts_in = 0, num_comp_in, elem_size_out, num_qpts_out, num_comp_out, q_comp;
1398   CeedEvalMode       *eval_modes_in = NULL, *eval_modes_out = NULL;
1399   CeedElemRestriction rstr_in = NULL, rstr_out = NULL;
1400   CeedBasis           basis_in = NULL, basis_out = NULL;
1401   CeedQFunctionField *qf_fields;
1402   CeedQFunction       qf;
1403   CeedOperatorField  *input_fields, *output_fields;
1404   CeedOperator_Hip   *impl;
1405 
1406   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1407   CeedCallBackend(CeedOperatorGetData(op, &impl));
1408 
1409   // Get intput and output fields
1410   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &input_fields, &num_output_fields, &output_fields));
1411 
1412   // Determine active input basis eval mode
1413   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
1414   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
1415   for (CeedInt i = 0; i < num_input_fields; i++) {
1416     CeedVector vec;
1417 
1418     CeedCallBackend(CeedOperatorFieldGetVector(input_fields[i], &vec));
1419     if (vec == CEED_VECTOR_ACTIVE) {
1420       CeedBasis    basis;
1421       CeedEvalMode eval_mode;
1422 
1423       CeedCallBackend(CeedOperatorFieldGetBasis(input_fields[i], &basis));
1424       CeedCheck(!basis_in || basis_in == basis, ceed, CEED_ERROR_BACKEND, "Backend does not implement operator assembly with multiple active bases");
1425       basis_in = basis;
1426       CeedCallBackend(CeedOperatorFieldGetElemRestriction(input_fields[i], &rstr_in));
1427       CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_in, &elem_size_in));
1428       if (basis_in == CEED_BASIS_NONE) num_qpts_in = elem_size_in;
1429       else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_in, &num_qpts_in));
1430       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1431       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_mode, &q_comp));
1432       if (eval_mode != CEED_EVAL_WEIGHT) {
1433         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF Assembly
1434         CeedCallBackend(CeedRealloc(num_eval_modes_in + q_comp, &eval_modes_in));
1435         for (CeedInt d = 0; d < q_comp; d++) {
1436           eval_modes_in[num_eval_modes_in + d] = eval_mode;
1437         }
1438         num_eval_modes_in += q_comp;
1439       }
1440     }
1441   }
1442 
1443   // Determine active output basis; basis_out and rstr_out only used if same as input, TODO
1444   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
1445   for (CeedInt i = 0; i < num_output_fields; i++) {
1446     CeedVector vec;
1447 
1448     CeedCallBackend(CeedOperatorFieldGetVector(output_fields[i], &vec));
1449     if (vec == CEED_VECTOR_ACTIVE) {
1450       CeedBasis    basis;
1451       CeedEvalMode eval_mode;
1452 
1453       CeedCallBackend(CeedOperatorFieldGetBasis(output_fields[i], &basis));
1454       CeedCheck(!basis_out || basis_out == basis, ceed, CEED_ERROR_BACKEND,
1455                 "Backend does not implement operator assembly with multiple active bases");
1456       basis_out = basis;
1457       CeedCallBackend(CeedOperatorFieldGetElemRestriction(output_fields[i], &rstr_out));
1458       CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_out, &elem_size_out));
1459       if (basis_out == CEED_BASIS_NONE) num_qpts_out = elem_size_out;
1460       else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_out, &num_qpts_out));
1461       CeedCheck(num_qpts_in == num_qpts_out, ceed, CEED_ERROR_UNSUPPORTED,
1462                 "Active input and output bases must have the same number of quadrature points");
1463       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1464       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_mode, &q_comp));
1465       if (eval_mode != CEED_EVAL_WEIGHT) {
1466         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF Assembly
1467         CeedCallBackend(CeedRealloc(num_eval_modes_out + q_comp, &eval_modes_out));
1468         for (CeedInt d = 0; d < q_comp; d++) {
1469           eval_modes_out[num_eval_modes_out + d] = eval_mode;
1470         }
1471         num_eval_modes_out += q_comp;
1472       }
1473     }
1474   }
1475   CeedCheck(num_eval_modes_in > 0 && num_eval_modes_out > 0, ceed, CEED_ERROR_UNSUPPORTED, "Cannot assemble operator without inputs/outputs");
1476 
1477   CeedCallBackend(CeedCalloc(1, &impl->asmb));
1478   CeedOperatorAssemble_Hip *asmb = impl->asmb;
1479   asmb->elems_per_block          = 1;
1480   asmb->block_size_x             = elem_size_in;
1481   asmb->block_size_y             = elem_size_out;
1482 
1483   CeedCallBackend(CeedGetData(ceed, &Hip_data));
1484   bool fallback = asmb->block_size_x * asmb->block_size_y * asmb->elems_per_block > Hip_data->device_prop.maxThreadsPerBlock;
1485 
1486   if (fallback) {
1487     // Use fallback kernel with 1D threadblock
1488     asmb->block_size_y = 1;
1489   }
1490 
1491   // Compile kernels
1492   CeedCallBackend(CeedElemRestrictionGetNumComponents(rstr_in, &num_comp_in));
1493   CeedCallBackend(CeedElemRestrictionGetNumComponents(rstr_out, &num_comp_out));
1494   CeedCallBackend(CeedGetJitAbsolutePath(ceed, "ceed/jit-source/hip/hip-ref-operator-assemble.h", &assembly_kernel_path));
1495   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Assembly Kernel Source -----\n");
1496   CeedCallBackend(CeedLoadSourceToBuffer(ceed, assembly_kernel_path, &assembly_kernel_source));
1497   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Assembly Source Complete! -----\n");
1498   CeedCallBackend(CeedCompile_Hip(ceed, assembly_kernel_source, &asmb->module, 10, "NUM_EVAL_MODES_IN", num_eval_modes_in, "NUM_EVAL_MODES_OUT",
1499                                   num_eval_modes_out, "NUM_COMP_IN", num_comp_in, "NUM_COMP_OUT", num_comp_out, "NUM_NODES_IN", elem_size_in,
1500                                   "NUM_NODES_OUT", elem_size_out, "NUM_QPTS", num_qpts_in, "BLOCK_SIZE",
1501                                   asmb->block_size_x * asmb->block_size_y * asmb->elems_per_block, "BLOCK_SIZE_Y", asmb->block_size_y, "USE_CEEDSIZE",
1502                                   use_ceedsize_idx));
1503   CeedCallBackend(CeedGetKernel_Hip(ceed, asmb->module, "LinearAssemble", &asmb->LinearAssemble));
1504   CeedCallBackend(CeedFree(&assembly_kernel_path));
1505   CeedCallBackend(CeedFree(&assembly_kernel_source));
1506 
1507   // Load into B_in, in order that they will be used in eval_modes_in
1508   {
1509     const CeedInt in_bytes           = elem_size_in * num_qpts_in * num_eval_modes_in * sizeof(CeedScalar);
1510     CeedInt       d_in               = 0;
1511     CeedEvalMode  eval_modes_in_prev = CEED_EVAL_NONE;
1512     bool          has_eval_none      = false;
1513     CeedScalar   *identity           = NULL;
1514 
1515     for (CeedInt i = 0; i < num_eval_modes_in; i++) {
1516       has_eval_none = has_eval_none || (eval_modes_in[i] == CEED_EVAL_NONE);
1517     }
1518     if (has_eval_none) {
1519       CeedCallBackend(CeedCalloc(elem_size_in * num_qpts_in, &identity));
1520       for (CeedInt i = 0; i < (elem_size_in < num_qpts_in ? elem_size_in : num_qpts_in); i++) identity[i * elem_size_in + i] = 1.0;
1521     }
1522 
1523     CeedCallHip(ceed, hipMalloc((void **)&asmb->d_B_in, in_bytes));
1524     for (CeedInt i = 0; i < num_eval_modes_in; i++) {
1525       const CeedScalar *h_B_in;
1526 
1527       CeedCallBackend(CeedOperatorGetBasisPointer(basis_in, eval_modes_in[i], identity, &h_B_in));
1528       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_modes_in[i], &q_comp));
1529       if (q_comp > 1) {
1530         if (i == 0 || eval_modes_in[i] != eval_modes_in_prev) d_in = 0;
1531         else h_B_in = &h_B_in[(++d_in) * elem_size_in * num_qpts_in];
1532       }
1533       eval_modes_in_prev = eval_modes_in[i];
1534 
1535       CeedCallHip(ceed, hipMemcpy(&asmb->d_B_in[i * elem_size_in * num_qpts_in], h_B_in, elem_size_in * num_qpts_in * sizeof(CeedScalar),
1536                                   hipMemcpyHostToDevice));
1537     }
1538 
1539     if (identity) {
1540       CeedCallBackend(CeedFree(&identity));
1541     }
1542   }
1543 
1544   // Load into B_out, in order that they will be used in eval_modes_out
1545   {
1546     const CeedInt out_bytes           = elem_size_out * num_qpts_out * num_eval_modes_out * sizeof(CeedScalar);
1547     CeedInt       d_out               = 0;
1548     CeedEvalMode  eval_modes_out_prev = CEED_EVAL_NONE;
1549     bool          has_eval_none       = false;
1550     CeedScalar   *identity            = NULL;
1551 
1552     for (CeedInt i = 0; i < num_eval_modes_out; i++) {
1553       has_eval_none = has_eval_none || (eval_modes_out[i] == CEED_EVAL_NONE);
1554     }
1555     if (has_eval_none) {
1556       CeedCallBackend(CeedCalloc(elem_size_out * num_qpts_out, &identity));
1557       for (CeedInt i = 0; i < (elem_size_out < num_qpts_out ? elem_size_out : num_qpts_out); i++) identity[i * elem_size_out + i] = 1.0;
1558     }
1559 
1560     CeedCallHip(ceed, hipMalloc((void **)&asmb->d_B_out, out_bytes));
1561     for (CeedInt i = 0; i < num_eval_modes_out; i++) {
1562       const CeedScalar *h_B_out;
1563 
1564       CeedCallBackend(CeedOperatorGetBasisPointer(basis_out, eval_modes_out[i], identity, &h_B_out));
1565       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_modes_out[i], &q_comp));
1566       if (q_comp > 1) {
1567         if (i == 0 || eval_modes_out[i] != eval_modes_out_prev) d_out = 0;
1568         else h_B_out = &h_B_out[(++d_out) * elem_size_out * num_qpts_out];
1569       }
1570       eval_modes_out_prev = eval_modes_out[i];
1571 
1572       CeedCallHip(ceed, hipMemcpy(&asmb->d_B_out[i * elem_size_out * num_qpts_out], h_B_out, elem_size_out * num_qpts_out * sizeof(CeedScalar),
1573                                   hipMemcpyHostToDevice));
1574     }
1575 
1576     if (identity) {
1577       CeedCallBackend(CeedFree(&identity));
1578     }
1579   }
1580   return CEED_ERROR_SUCCESS;
1581 }
1582 
1583 //------------------------------------------------------------------------------
1584 // Assemble matrix data for COO matrix of assembled operator.
1585 // The sparsity pattern is set by CeedOperatorLinearAssembleSymbolic.
1586 //
1587 // Note that this (and other assembly routines) currently assume only one active input restriction/basis per operator
1588 // (could have multiple basis eval modes).
1589 // TODO: allow multiple active input restrictions/basis objects
1590 //------------------------------------------------------------------------------
1591 static int CeedSingleOperatorAssemble_Hip(CeedOperator op, CeedInt offset, CeedVector values) {
1592   Ceed                ceed;
1593   CeedSize            values_length = 0, assembled_qf_length = 0;
1594   CeedInt             use_ceedsize_idx = 0, num_elem_in, num_elem_out, elem_size_in, elem_size_out;
1595   CeedScalar         *values_array;
1596   const CeedScalar   *assembled_qf_array;
1597   CeedVector          assembled_qf   = NULL;
1598   CeedElemRestriction assembled_rstr = NULL, rstr_in, rstr_out;
1599   CeedRestrictionType rstr_type_in, rstr_type_out;
1600   const bool         *orients_in = NULL, *orients_out = NULL;
1601   const CeedInt8     *curl_orients_in = NULL, *curl_orients_out = NULL;
1602   CeedOperator_Hip   *impl;
1603 
1604   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1605   CeedCallBackend(CeedOperatorGetData(op, &impl));
1606 
1607   // Assemble QFunction
1608   CeedCallBackend(CeedOperatorLinearAssembleQFunctionBuildOrUpdate(op, &assembled_qf, &assembled_rstr, CEED_REQUEST_IMMEDIATE));
1609   CeedCallBackend(CeedElemRestrictionDestroy(&assembled_rstr));
1610   CeedCallBackend(CeedVectorGetArrayRead(assembled_qf, CEED_MEM_DEVICE, &assembled_qf_array));
1611 
1612   CeedCallBackend(CeedVectorGetLength(values, &values_length));
1613   CeedCallBackend(CeedVectorGetLength(assembled_qf, &assembled_qf_length));
1614   if ((values_length > INT_MAX) || (assembled_qf_length > INT_MAX)) use_ceedsize_idx = 1;
1615 
1616   // Setup
1617   if (!impl->asmb) CeedCallBackend(CeedSingleOperatorAssembleSetup_Hip(op, use_ceedsize_idx));
1618   CeedOperatorAssemble_Hip *asmb = impl->asmb;
1619 
1620   assert(asmb != NULL);
1621 
1622   // Assemble element operator
1623   CeedCallBackend(CeedVectorGetArray(values, CEED_MEM_DEVICE, &values_array));
1624   values_array += offset;
1625 
1626   CeedCallBackend(CeedOperatorGetActiveElemRestrictions(op, &rstr_in, &rstr_out));
1627   CeedCallBackend(CeedElemRestrictionGetNumElements(rstr_in, &num_elem_in));
1628   CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_in, &elem_size_in));
1629 
1630   CeedCallBackend(CeedElemRestrictionGetType(rstr_in, &rstr_type_in));
1631   if (rstr_type_in == CEED_RESTRICTION_ORIENTED) {
1632     CeedCallBackend(CeedElemRestrictionGetOrientations(rstr_in, CEED_MEM_DEVICE, &orients_in));
1633   } else if (rstr_type_in == CEED_RESTRICTION_CURL_ORIENTED) {
1634     CeedCallBackend(CeedElemRestrictionGetCurlOrientations(rstr_in, CEED_MEM_DEVICE, &curl_orients_in));
1635   }
1636 
1637   if (rstr_in != rstr_out) {
1638     CeedCallBackend(CeedElemRestrictionGetNumElements(rstr_out, &num_elem_out));
1639     CeedCheck(num_elem_in == num_elem_out, ceed, CEED_ERROR_UNSUPPORTED,
1640               "Active input and output operator restrictions must have the same number of elements");
1641     CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_out, &elem_size_out));
1642 
1643     CeedCallBackend(CeedElemRestrictionGetType(rstr_out, &rstr_type_out));
1644     if (rstr_type_out == CEED_RESTRICTION_ORIENTED) {
1645       CeedCallBackend(CeedElemRestrictionGetOrientations(rstr_out, CEED_MEM_DEVICE, &orients_out));
1646     } else if (rstr_type_out == CEED_RESTRICTION_CURL_ORIENTED) {
1647       CeedCallBackend(CeedElemRestrictionGetCurlOrientations(rstr_out, CEED_MEM_DEVICE, &curl_orients_out));
1648     }
1649   } else {
1650     elem_size_out    = elem_size_in;
1651     orients_out      = orients_in;
1652     curl_orients_out = curl_orients_in;
1653   }
1654 
1655   // Compute B^T D B
1656   CeedInt shared_mem =
1657       ((curl_orients_in || curl_orients_out ? elem_size_in * elem_size_out : 0) + (curl_orients_in ? elem_size_in * asmb->block_size_y : 0)) *
1658       sizeof(CeedScalar);
1659   CeedInt grid   = CeedDivUpInt(num_elem_in, asmb->elems_per_block);
1660   void   *args[] = {(void *)&num_elem_in, &asmb->d_B_in,     &asmb->d_B_out,      &orients_in,  &curl_orients_in,
1661                     &orients_out,         &curl_orients_out, &assembled_qf_array, &values_array};
1662 
1663   CeedCallBackend(
1664       CeedRunKernelDimShared_Hip(ceed, asmb->LinearAssemble, grid, asmb->block_size_x, asmb->block_size_y, asmb->elems_per_block, shared_mem, args));
1665 
1666   // Restore arrays
1667   CeedCallBackend(CeedVectorRestoreArray(values, &values_array));
1668   CeedCallBackend(CeedVectorRestoreArrayRead(assembled_qf, &assembled_qf_array));
1669 
1670   // Cleanup
1671   CeedCallBackend(CeedVectorDestroy(&assembled_qf));
1672   if (rstr_type_in == CEED_RESTRICTION_ORIENTED) {
1673     CeedCallBackend(CeedElemRestrictionRestoreOrientations(rstr_in, &orients_in));
1674   } else if (rstr_type_in == CEED_RESTRICTION_CURL_ORIENTED) {
1675     CeedCallBackend(CeedElemRestrictionRestoreCurlOrientations(rstr_in, &curl_orients_in));
1676   }
1677   if (rstr_in != rstr_out) {
1678     if (rstr_type_out == CEED_RESTRICTION_ORIENTED) {
1679       CeedCallBackend(CeedElemRestrictionRestoreOrientations(rstr_out, &orients_out));
1680     } else if (rstr_type_out == CEED_RESTRICTION_CURL_ORIENTED) {
1681       CeedCallBackend(CeedElemRestrictionRestoreCurlOrientations(rstr_out, &curl_orients_out));
1682     }
1683   }
1684   return CEED_ERROR_SUCCESS;
1685 }
1686 
1687 //------------------------------------------------------------------------------
1688 // Assemble Linear QFunction AtPoints
1689 //------------------------------------------------------------------------------
1690 static int CeedOperatorLinearAssembleQFunctionAtPoints_Hip(CeedOperator op, CeedVector *assembled, CeedElemRestriction *rstr, CeedRequest *request) {
1691   return CeedError(CeedOperatorReturnCeed(op), CEED_ERROR_BACKEND, "Backend does not implement CeedOperatorLinearAssembleQFunction");
1692 }
1693 
1694 //------------------------------------------------------------------------------
1695 // Assemble Linear Diagonal AtPoints
1696 //------------------------------------------------------------------------------
1697 static int CeedOperatorLinearAssembleAddDiagonalAtPoints_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request) {
1698   CeedInt             max_num_points, *num_points, num_elem, num_input_fields, num_output_fields;
1699   Ceed                ceed;
1700   CeedVector          active_e_vec_in, active_e_vec_out;
1701   CeedQFunctionField *qf_input_fields, *qf_output_fields;
1702   CeedQFunction       qf;
1703   CeedOperatorField  *op_input_fields, *op_output_fields;
1704   CeedOperator_Hip   *impl;
1705 
1706   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1707   CeedCallBackend(CeedOperatorGetData(op, &impl));
1708   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
1709   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
1710   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
1711   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
1712 
1713   // Setup
1714   CeedCallBackend(CeedOperatorSetupAtPoints_Hip(op));
1715   num_points     = impl->num_points;
1716   max_num_points = impl->max_num_points;
1717 
1718   // Work vector
1719   CeedCallBackend(CeedGetWorkVector(ceed, impl->max_active_e_vec_len, &active_e_vec_in));
1720   CeedCallBackend(CeedGetWorkVector(ceed, impl->max_active_e_vec_len, &active_e_vec_out));
1721   {
1722     CeedSize length_in, length_out;
1723 
1724     CeedCallBackend(CeedVectorGetLength(active_e_vec_in, &length_in));
1725     CeedCallBackend(CeedVectorGetLength(active_e_vec_out, &length_out));
1726     // Need input e_vec to be longer
1727     if (length_in < length_out) {
1728       CeedVector temp = active_e_vec_in;
1729 
1730       active_e_vec_in  = active_e_vec_out;
1731       active_e_vec_out = temp;
1732     }
1733   }
1734 
1735   // Get point coordinates
1736   if (!impl->point_coords_elem) {
1737     CeedVector          point_coords = NULL;
1738     CeedElemRestriction rstr_points  = NULL;
1739 
1740     CeedCallBackend(CeedOperatorAtPointsGetPoints(op, &rstr_points, &point_coords));
1741     CeedCallBackend(CeedElemRestrictionCreateVector(rstr_points, NULL, &impl->point_coords_elem));
1742     CeedCallBackend(CeedElemRestrictionApply(rstr_points, CEED_NOTRANSPOSE, point_coords, impl->point_coords_elem, request));
1743   }
1744 
1745   // Process inputs
1746   for (CeedInt i = 0; i < num_input_fields; i++) {
1747     CeedCallBackend(CeedOperatorInputRestrict_Hip(op_input_fields[i], qf_input_fields[i], i, NULL, NULL, true, impl, request));
1748     CeedCallBackend(CeedOperatorInputBasisAtPoints_Hip(op_input_fields[i], qf_input_fields[i], i, NULL, NULL, num_elem, num_points, true, impl));
1749   }
1750 
1751   // Clear active input Qvecs
1752   for (CeedInt i = 0; i < num_input_fields; i++) {
1753     CeedVector vec;
1754 
1755     CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
1756     if (vec != CEED_VECTOR_ACTIVE) continue;
1757     CeedCallBackend(CeedVectorSetValue(impl->q_vecs_in[i], 0.0));
1758   }
1759 
1760   // Output pointers, as necessary
1761   for (CeedInt i = 0; i < num_output_fields; i++) {
1762     CeedEvalMode eval_mode;
1763 
1764     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
1765     if (eval_mode == CEED_EVAL_NONE) {
1766       CeedScalar *e_vec_array;
1767 
1768       CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs_out[i], CEED_MEM_DEVICE, &e_vec_array));
1769       CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_vec_array));
1770     }
1771   }
1772 
1773   // Loop over active fields
1774   for (CeedInt i = 0; i < num_input_fields; i++) {
1775     bool                is_active_at_points = true;
1776     CeedInt             elem_size = 1, num_comp_active = 1, e_vec_size = 0;
1777     CeedRestrictionType rstr_type;
1778     CeedVector          l_vec;
1779     CeedElemRestriction elem_rstr;
1780 
1781     CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &l_vec));
1782     // -- Skip non-active input
1783     if (l_vec != CEED_VECTOR_ACTIVE) continue;
1784 
1785     // -- Get active restriction type
1786     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &elem_rstr));
1787     CeedCallBackend(CeedElemRestrictionGetType(elem_rstr, &rstr_type));
1788     is_active_at_points = rstr_type == CEED_RESTRICTION_POINTS;
1789     if (!is_active_at_points) CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
1790     else elem_size = max_num_points;
1791     CeedCallBackend(CeedElemRestrictionGetNumComponents(elem_rstr, &num_comp_active));
1792 
1793     e_vec_size = elem_size * num_comp_active;
1794     for (CeedInt s = 0; s < e_vec_size; s++) {
1795       bool         is_active_input = false;
1796       CeedEvalMode eval_mode;
1797       CeedVector   l_vec, q_vec = impl->q_vecs_in[i];
1798       CeedBasis    basis;
1799 
1800       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &l_vec));
1801       // Skip non-active input
1802       is_active_input = l_vec == CEED_VECTOR_ACTIVE;
1803       if (!is_active_input) continue;
1804 
1805       // Update unit vector
1806       if (s == 0) CeedCallBackend(CeedVectorSetValue(active_e_vec_in, 0.0));
1807       else CeedCallBackend(CeedVectorSetValueStrided(active_e_vec_in, s - 1, e_vec_size, 0.0));
1808       CeedCallBackend(CeedVectorSetValueStrided(active_e_vec_in, s, e_vec_size, 1.0));
1809 
1810       // Basis action
1811       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
1812       switch (eval_mode) {
1813         case CEED_EVAL_NONE: {
1814           const CeedScalar *e_vec_array;
1815 
1816           CeedCallBackend(CeedVectorGetArrayRead(active_e_vec_in, CEED_MEM_DEVICE, &e_vec_array));
1817           CeedCallBackend(CeedVectorSetArray(q_vec, CEED_MEM_DEVICE, CEED_USE_POINTER, (CeedScalar *)e_vec_array));
1818           break;
1819         }
1820         case CEED_EVAL_INTERP:
1821         case CEED_EVAL_GRAD:
1822         case CEED_EVAL_DIV:
1823         case CEED_EVAL_CURL:
1824           CeedCallBackend(CeedOperatorFieldGetBasis(op_input_fields[i], &basis));
1825           CeedCallBackend(
1826               CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_NOTRANSPOSE, eval_mode, impl->point_coords_elem, active_e_vec_in, q_vec));
1827           break;
1828         case CEED_EVAL_WEIGHT:
1829           break;  // No action
1830       }
1831 
1832       // Q function
1833       CeedCallBackend(CeedQFunctionApply(qf, num_elem * max_num_points, impl->q_vecs_in, impl->q_vecs_out));
1834 
1835       // Output basis apply if needed
1836       for (CeedInt j = 0; j < num_output_fields; j++) {
1837         bool                is_active_output = false;
1838         CeedInt             elem_size        = 0;
1839         CeedRestrictionType rstr_type;
1840         CeedEvalMode        eval_mode;
1841         CeedVector          l_vec, e_vec = impl->e_vecs_out[j], q_vec = impl->q_vecs_out[j];
1842         CeedElemRestriction elem_rstr;
1843         CeedBasis           basis;
1844 
1845         CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[j], &l_vec));
1846         // ---- Skip non-active output
1847         is_active_output = l_vec == CEED_VECTOR_ACTIVE;
1848         if (!is_active_output) continue;
1849         if (!e_vec) e_vec = active_e_vec_out;
1850 
1851         // ---- Check if elem size matches
1852         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[j], &elem_rstr));
1853         CeedCallBackend(CeedElemRestrictionGetType(elem_rstr, &rstr_type));
1854         if (is_active_at_points && rstr_type != CEED_RESTRICTION_POINTS) continue;
1855         if (rstr_type == CEED_RESTRICTION_POINTS) {
1856           CeedCallBackend(CeedElemRestrictionGetMaxPointsInElement(elem_rstr, &elem_size));
1857         } else {
1858           CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
1859         }
1860         {
1861           CeedInt num_comp = 0;
1862 
1863           CeedCallBackend(CeedElemRestrictionGetNumComponents(elem_rstr, &num_comp));
1864           if (e_vec_size != num_comp * elem_size) continue;
1865         }
1866 
1867         // Basis action
1868         CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[j], &eval_mode));
1869         switch (eval_mode) {
1870           case CEED_EVAL_NONE: {
1871             CeedScalar *e_vec_array;
1872 
1873             CeedCallBackend(CeedVectorTakeArray(q_vec, CEED_MEM_DEVICE, &e_vec_array));
1874             CeedCallBackend(CeedVectorRestoreArray(e_vec, &e_vec_array));
1875             break;
1876           }
1877           case CEED_EVAL_INTERP:
1878           case CEED_EVAL_GRAD:
1879           case CEED_EVAL_DIV:
1880           case CEED_EVAL_CURL:
1881             CeedCallBackend(CeedOperatorFieldGetBasis(op_output_fields[j], &basis));
1882             CeedCallBackend(CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_TRANSPOSE, eval_mode, impl->point_coords_elem, q_vec, e_vec));
1883             break;
1884           // LCOV_EXCL_START
1885           case CEED_EVAL_WEIGHT: {
1886             return CeedError(CeedOperatorReturnCeed(op), CEED_ERROR_BACKEND, "CEED_EVAL_WEIGHT cannot be an output evaluation mode");
1887             // LCOV_EXCL_STOP
1888           }
1889         }
1890 
1891         // Mask output e-vec
1892         CeedCallBackend(CeedVectorPointwiseMult(e_vec, active_e_vec_in, e_vec));
1893 
1894         // Restrict
1895         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[j], &elem_rstr));
1896         CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_TRANSPOSE, e_vec, assembled, request));
1897 
1898         // Reset q_vec for
1899         if (eval_mode == CEED_EVAL_NONE) {
1900           CeedScalar *e_vec_array;
1901 
1902           CeedCallBackend(CeedVectorGetArrayWrite(e_vec, CEED_MEM_DEVICE, &e_vec_array));
1903           CeedCallBackend(CeedVectorSetArray(q_vec, CEED_MEM_DEVICE, CEED_USE_POINTER, e_vec_array));
1904         }
1905       }
1906 
1907       // Reset vec
1908       if (s == e_vec_size - 1 && i != num_input_fields - 1) CeedCallBackend(CeedVectorSetValue(q_vec, 0.0));
1909     }
1910   }
1911 
1912   // Restore CEED_EVAL_NONE
1913   for (CeedInt i = 0; i < num_output_fields; i++) {
1914     CeedEvalMode eval_mode;
1915 
1916     // Get eval_mode
1917     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
1918 
1919     // Restore evec
1920     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
1921     if (eval_mode == CEED_EVAL_NONE) {
1922       CeedScalar *e_vec_array;
1923 
1924       CeedCallBackend(CeedVectorTakeArray(impl->q_vecs_in[i], CEED_MEM_DEVICE, &e_vec_array));
1925       CeedCallBackend(CeedVectorRestoreArray(impl->e_vecs_in[i], &e_vec_array));
1926     }
1927   }
1928 
1929   // Restore input arrays
1930   for (CeedInt i = 0; i < num_input_fields; i++) {
1931     CeedCallBackend(CeedOperatorInputRestore_Hip(op_input_fields[i], qf_input_fields[i], i, NULL, NULL, true, impl));
1932   }
1933   return CEED_ERROR_SUCCESS;
1934 }
1935 
1936 //------------------------------------------------------------------------------
1937 // Create operator
1938 //------------------------------------------------------------------------------
1939 int CeedOperatorCreate_Hip(CeedOperator op) {
1940   Ceed              ceed;
1941   CeedOperator_Hip *impl;
1942 
1943   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1944   CeedCallBackend(CeedCalloc(1, &impl));
1945   CeedCallBackend(CeedOperatorSetData(op, impl));
1946 
1947   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunction", CeedOperatorLinearAssembleQFunction_Hip));
1948   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunctionUpdate", CeedOperatorLinearAssembleQFunctionUpdate_Hip));
1949   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleAddDiagonal", CeedOperatorLinearAssembleAddDiagonal_Hip));
1950   CeedCallBackend(
1951       CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleAddPointBlockDiagonal", CeedOperatorLinearAssembleAddPointBlockDiagonal_Hip));
1952   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleSingle", CeedSingleOperatorAssemble_Hip));
1953   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "ApplyAdd", CeedOperatorApplyAdd_Hip));
1954   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "Destroy", CeedOperatorDestroy_Hip));
1955   return CEED_ERROR_SUCCESS;
1956 }
1957 
1958 //------------------------------------------------------------------------------
1959 // Create operator AtPoints
1960 //------------------------------------------------------------------------------
1961 int CeedOperatorCreateAtPoints_Hip(CeedOperator op) {
1962   Ceed              ceed;
1963   CeedOperator_Hip *impl;
1964 
1965   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1966   CeedCallBackend(CeedCalloc(1, &impl));
1967   CeedCallBackend(CeedOperatorSetData(op, impl));
1968 
1969   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunction", CeedOperatorLinearAssembleQFunctionAtPoints_Hip));
1970   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleAddDiagonal", CeedOperatorLinearAssembleAddDiagonalAtPoints_Hip));
1971   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "ApplyAdd", CeedOperatorApplyAddAtPoints_Hip));
1972   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "Destroy", CeedOperatorDestroy_Hip));
1973   return CEED_ERROR_SUCCESS;
1974 }
1975 
1976 //------------------------------------------------------------------------------
1977