xref: /libCEED/backends/hip-ref/ceed-hip-ref-operator.c (revision 41655a2310ae869cbaf66471563d33865f525ec1)
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->skip_rstr_in));
30   CeedCallBackend(CeedFree(&impl->skip_rstr_out));
31   CeedCallBackend(CeedFree(&impl->apply_add_basis_out));
32   for (CeedInt i = 0; i < impl->num_inputs + impl->num_outputs; i++) {
33     CeedCallBackend(CeedVectorDestroy(&impl->e_vecs[i]));
34   }
35   CeedCallBackend(CeedFree(&impl->e_vecs));
36   CeedCallBackend(CeedFree(&impl->input_states));
37 
38   for (CeedInt i = 0; i < impl->num_inputs; i++) {
39     CeedCallBackend(CeedVectorDestroy(&impl->q_vecs_in[i]));
40   }
41   CeedCallBackend(CeedFree(&impl->q_vecs_in));
42 
43   for (CeedInt i = 0; i < impl->num_outputs; i++) {
44     CeedCallBackend(CeedVectorDestroy(&impl->q_vecs_out[i]));
45   }
46   CeedCallBackend(CeedFree(&impl->q_vecs_out));
47   CeedCallBackend(CeedVectorDestroy(&impl->point_coords_elem));
48 
49   // QFunction assembly data
50   for (CeedInt i = 0; i < impl->num_active_in; i++) {
51     CeedCallBackend(CeedVectorDestroy(&impl->qf_active_in[i]));
52   }
53   CeedCallBackend(CeedFree(&impl->qf_active_in));
54 
55   // Diag data
56   if (impl->diag) {
57     Ceed ceed;
58 
59     CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
60     if (impl->diag->module) {
61       CeedCallHip(ceed, hipModuleUnload(impl->diag->module));
62     }
63     if (impl->diag->module_point_block) {
64       CeedCallHip(ceed, hipModuleUnload(impl->diag->module_point_block));
65     }
66     CeedCallHip(ceed, hipFree(impl->diag->d_eval_modes_in));
67     CeedCallHip(ceed, hipFree(impl->diag->d_eval_modes_out));
68     CeedCallHip(ceed, hipFree(impl->diag->d_identity));
69     CeedCallHip(ceed, hipFree(impl->diag->d_interp_in));
70     CeedCallHip(ceed, hipFree(impl->diag->d_interp_out));
71     CeedCallHip(ceed, hipFree(impl->diag->d_grad_in));
72     CeedCallHip(ceed, hipFree(impl->diag->d_grad_out));
73     CeedCallHip(ceed, hipFree(impl->diag->d_div_in));
74     CeedCallHip(ceed, hipFree(impl->diag->d_div_out));
75     CeedCallHip(ceed, hipFree(impl->diag->d_curl_in));
76     CeedCallHip(ceed, hipFree(impl->diag->d_curl_out));
77     CeedCallBackend(CeedElemRestrictionDestroy(&impl->diag->diag_rstr));
78     CeedCallBackend(CeedElemRestrictionDestroy(&impl->diag->point_block_diag_rstr));
79     CeedCallBackend(CeedVectorDestroy(&impl->diag->elem_diag));
80     CeedCallBackend(CeedVectorDestroy(&impl->diag->point_block_elem_diag));
81   }
82   CeedCallBackend(CeedFree(&impl->diag));
83 
84   if (impl->asmb) {
85     Ceed ceed;
86 
87     CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
88     CeedCallHip(ceed, hipModuleUnload(impl->asmb->module));
89     CeedCallHip(ceed, hipFree(impl->asmb->d_B_in));
90     CeedCallHip(ceed, hipFree(impl->asmb->d_B_out));
91   }
92   CeedCallBackend(CeedFree(&impl->asmb));
93 
94   CeedCallBackend(CeedFree(&impl));
95   return CEED_ERROR_SUCCESS;
96 }
97 
98 //------------------------------------------------------------------------------
99 // Setup infields or outfields
100 //------------------------------------------------------------------------------
101 static int CeedOperatorSetupFields_Hip(CeedQFunction qf, CeedOperator op, bool is_input, bool is_at_points, bool *skip_rstr, bool *apply_add_basis,
102                                        CeedVector *e_vecs, CeedVector *q_vecs, CeedInt start_e, CeedInt num_fields, CeedInt Q, CeedInt num_elem) {
103   Ceed                ceed;
104   CeedQFunctionField *qf_fields;
105   CeedOperatorField  *op_fields;
106 
107   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
108   if (is_input) {
109     CeedCallBackend(CeedOperatorGetFields(op, NULL, &op_fields, NULL, NULL));
110     CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
111   } else {
112     CeedCallBackend(CeedOperatorGetFields(op, NULL, NULL, NULL, &op_fields));
113     CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
114   }
115 
116   // Loop over fields
117   for (CeedInt i = 0; i < num_fields; i++) {
118     bool         is_strided = false, skip_restriction = false;
119     CeedSize     q_size;
120     CeedInt      size;
121     CeedEvalMode eval_mode;
122     CeedBasis    basis;
123 
124     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
125     if (eval_mode != CEED_EVAL_WEIGHT) {
126       CeedElemRestriction elem_rstr;
127 
128       // Check whether this field can skip the element restriction:
129       // Must be passive input, with eval_mode NONE, and have a strided restriction with CEED_STRIDES_BACKEND.
130       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[i], &elem_rstr));
131 
132       // First, check whether the field is input or output:
133       if (is_input) {
134         CeedVector vec;
135 
136         // Check for passive input
137         CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
138         if (vec != CEED_VECTOR_ACTIVE) {
139           // Check eval_mode
140           if (eval_mode == CEED_EVAL_NONE) {
141             // Check for strided restriction
142             CeedCallBackend(CeedElemRestrictionIsStrided(elem_rstr, &is_strided));
143             if (is_strided) {
144               // Check if vector is already in preferred backend ordering
145               CeedCallBackend(CeedElemRestrictionHasBackendStrides(elem_rstr, &skip_restriction));
146             }
147           }
148         }
149       }
150       if (skip_restriction) {
151         // We do not need an E-Vector, but will use the input field vector's data directly in the operator application.
152         e_vecs[i + start_e] = NULL;
153       } else {
154         CeedCallBackend(CeedElemRestrictionCreateVector(elem_rstr, NULL, &e_vecs[i + start_e]));
155       }
156     }
157 
158     switch (eval_mode) {
159       case CEED_EVAL_NONE:
160         CeedCallBackend(CeedQFunctionFieldGetSize(qf_fields[i], &size));
161         q_size = (CeedSize)num_elem * Q * size;
162         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
163         break;
164       case CEED_EVAL_INTERP:
165       case CEED_EVAL_GRAD:
166       case CEED_EVAL_DIV:
167       case CEED_EVAL_CURL:
168         CeedCallBackend(CeedQFunctionFieldGetSize(qf_fields[i], &size));
169         q_size = (CeedSize)num_elem * Q * size;
170         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
171         break;
172       case CEED_EVAL_WEIGHT:  // Only on input fields
173         CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
174         q_size = (CeedSize)num_elem * Q;
175         CeedCallBackend(CeedVectorCreate(ceed, q_size, &q_vecs[i]));
176         if (is_at_points) {
177           CeedInt num_points[num_elem];
178 
179           for (CeedInt i = 0; i < num_elem; i++) num_points[i] = Q;
180           CeedCallBackend(
181               CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_NOTRANSPOSE, CEED_EVAL_WEIGHT, CEED_VECTOR_NONE, CEED_VECTOR_NONE, q_vecs[i]));
182         } else {
183           CeedCallBackend(CeedBasisApply(basis, num_elem, CEED_NOTRANSPOSE, CEED_EVAL_WEIGHT, CEED_VECTOR_NONE, q_vecs[i]));
184         }
185         break;
186     }
187   }
188   // Drop duplicate restrictions
189   if (is_input) {
190     for (CeedInt i = 0; i < num_fields; i++) {
191       CeedVector          vec_i;
192       CeedElemRestriction rstr_i;
193 
194       CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec_i));
195       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[i], &rstr_i));
196       for (CeedInt j = i + 1; j < num_fields; j++) {
197         CeedVector          vec_j;
198         CeedElemRestriction rstr_j;
199 
200         CeedCallBackend(CeedOperatorFieldGetVector(op_fields[j], &vec_j));
201         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[j], &rstr_j));
202         if (vec_i == vec_j && rstr_i == rstr_j) {
203           CeedCallBackend(CeedVectorReferenceCopy(e_vecs[i + start_e], &e_vecs[j + start_e]));
204           skip_rstr[j] = true;
205         }
206       }
207     }
208   } else {
209     for (CeedInt i = num_fields - 1; i >= 0; i--) {
210       CeedVector          vec_i;
211       CeedElemRestriction rstr_i;
212 
213       CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec_i));
214       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[i], &rstr_i));
215       for (CeedInt j = i - 1; j >= 0; j--) {
216         CeedVector          vec_j;
217         CeedElemRestriction rstr_j;
218 
219         CeedCallBackend(CeedOperatorFieldGetVector(op_fields[j], &vec_j));
220         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_fields[j], &rstr_j));
221         if (vec_i == vec_j && rstr_i == rstr_j) {
222           CeedCallBackend(CeedVectorReferenceCopy(e_vecs[i + start_e], &e_vecs[j + start_e]));
223           skip_rstr[j]       = true;
224           apply_add_basis[i] = true;
225         }
226       }
227     }
228   }
229   return CEED_ERROR_SUCCESS;
230 }
231 
232 //------------------------------------------------------------------------------
233 // CeedOperator needs to connect all the named fields (be they active or passive) to the named inputs and outputs of its CeedQFunction.
234 //------------------------------------------------------------------------------
235 static int CeedOperatorSetup_Hip(CeedOperator op) {
236   Ceed                ceed;
237   bool                is_setup_done;
238   CeedInt             Q, num_elem, num_input_fields, num_output_fields;
239   CeedQFunctionField *qf_input_fields, *qf_output_fields;
240   CeedQFunction       qf;
241   CeedOperatorField  *op_input_fields, *op_output_fields;
242   CeedOperator_Hip   *impl;
243 
244   CeedCallBackend(CeedOperatorIsSetupDone(op, &is_setup_done));
245   if (is_setup_done) return CEED_ERROR_SUCCESS;
246 
247   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
248   CeedCallBackend(CeedOperatorGetData(op, &impl));
249   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
250   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
251   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
252   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
253   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
254 
255   // Allocate
256   CeedCallBackend(CeedCalloc(num_input_fields + num_output_fields, &impl->e_vecs));
257   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->skip_rstr_in));
258   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->skip_rstr_out));
259   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->apply_add_basis_out));
260   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->input_states));
261   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->q_vecs_in));
262   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->q_vecs_out));
263   impl->num_inputs  = num_input_fields;
264   impl->num_outputs = num_output_fields;
265 
266   // Set up infield and outfield e-vecs and q-vecs
267   // Infields
268   CeedCallBackend(
269       CeedOperatorSetupFields_Hip(qf, op, true, false, impl->skip_rstr_in, NULL, impl->e_vecs, impl->q_vecs_in, 0, num_input_fields, Q, num_elem));
270   // Outfields
271   CeedCallBackend(CeedOperatorSetupFields_Hip(qf, op, false, false, impl->skip_rstr_out, impl->apply_add_basis_out, impl->e_vecs, impl->q_vecs_out,
272                                               num_input_fields, num_output_fields, Q, num_elem));
273 
274   // Reuse active e-vecs where able
275   {
276     CeedInt              num_used  = 0;
277     CeedElemRestriction *rstr_used = NULL;
278 
279     for (CeedInt i = 0; i < num_input_fields; i++) {
280       bool                is_used = false;
281       CeedVector          vec_i;
282       CeedElemRestriction rstr_i;
283 
284       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec_i));
285       if (vec_i != CEED_VECTOR_ACTIVE) continue;
286       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &rstr_i));
287       for (CeedInt j = 0; j < num_used; j++) {
288         if (rstr_i == rstr_used[i]) is_used = true;
289       }
290       if (is_used) continue;
291       num_used++;
292       if (num_used == 1) CeedCallBackend(CeedCalloc(num_used, &rstr_used));
293       else CeedCallBackend(CeedRealloc(num_used, &rstr_used));
294       rstr_used[num_used - 1] = rstr_i;
295       for (CeedInt j = num_output_fields - 1; j >= 0; j--) {
296         CeedEvalMode        eval_mode;
297         CeedVector          vec_j;
298         CeedElemRestriction rstr_j;
299 
300         CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[j], &vec_j));
301         if (vec_j != CEED_VECTOR_ACTIVE) continue;
302         CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[j], &eval_mode));
303         if (eval_mode == CEED_EVAL_NONE) continue;
304         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[j], &rstr_j));
305         if (rstr_i == rstr_j) {
306           CeedCallBackend(CeedVectorReferenceCopy(impl->e_vecs[i], &impl->e_vecs[j + impl->num_inputs]));
307         }
308       }
309     }
310     CeedCallBackend(CeedFree(&rstr_used));
311   }
312   CeedCallBackend(CeedOperatorSetSetupDone(op));
313   return CEED_ERROR_SUCCESS;
314 }
315 
316 //------------------------------------------------------------------------------
317 // Setup Operator Inputs
318 //------------------------------------------------------------------------------
319 static inline int CeedOperatorSetupInputs_Hip(CeedInt num_input_fields, CeedQFunctionField *qf_input_fields, CeedOperatorField *op_input_fields,
320                                               CeedVector in_vec, const bool skip_active, CeedScalar *e_data[2 * CEED_FIELD_MAX],
321                                               CeedOperator_Hip *impl, CeedRequest *request) {
322   for (CeedInt i = 0; i < num_input_fields; i++) {
323     CeedEvalMode        eval_mode;
324     CeedVector          vec;
325     CeedElemRestriction elem_rstr;
326 
327     // Get input vector
328     CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
329     if (vec == CEED_VECTOR_ACTIVE) {
330       if (skip_active) continue;
331       else vec = in_vec;
332     }
333 
334     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
335     if (eval_mode == CEED_EVAL_WEIGHT) {  // Skip
336     } else {
337       // Get input vector
338       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
339       // Get input element restriction
340       CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &elem_rstr));
341       if (vec == CEED_VECTOR_ACTIVE) vec = in_vec;
342       // Restrict, if necessary
343       if (!impl->e_vecs[i]) {
344         // No restriction for this field; read data directly from vec.
345         CeedCallBackend(CeedVectorGetArrayRead(vec, CEED_MEM_DEVICE, (const CeedScalar **)&e_data[i]));
346       } else {
347         uint64_t state;
348 
349         CeedCallBackend(CeedVectorGetState(vec, &state));
350         if ((state != impl->input_states[i] || vec == in_vec) && !impl->skip_rstr_in[i]) {
351           CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_NOTRANSPOSE, vec, impl->e_vecs[i], request));
352         }
353         impl->input_states[i] = state;
354         // Get evec
355         CeedCallBackend(CeedVectorGetArrayRead(impl->e_vecs[i], CEED_MEM_DEVICE, (const CeedScalar **)&e_data[i]));
356       }
357     }
358   }
359   return CEED_ERROR_SUCCESS;
360 }
361 
362 //------------------------------------------------------------------------------
363 // Input Basis Action
364 //------------------------------------------------------------------------------
365 static inline int CeedOperatorInputBasis_Hip(CeedInt num_elem, CeedQFunctionField *qf_input_fields, CeedOperatorField *op_input_fields,
366                                              CeedInt num_input_fields, const bool skip_active, CeedScalar *e_data[2 * CEED_FIELD_MAX],
367                                              CeedOperator_Hip *impl) {
368   for (CeedInt i = 0; i < num_input_fields; i++) {
369     CeedInt             elem_size, size;
370     CeedEvalMode        eval_mode;
371     CeedElemRestriction elem_rstr;
372     CeedBasis           basis;
373 
374     // Skip active input
375     if (skip_active) {
376       CeedVector vec;
377 
378       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
379       if (vec == CEED_VECTOR_ACTIVE) continue;
380     }
381     // Get elem_size, eval_mode, size
382     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &elem_rstr));
383     CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
384     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
385     CeedCallBackend(CeedQFunctionFieldGetSize(qf_input_fields[i], &size));
386     // Basis action
387     switch (eval_mode) {
388       case CEED_EVAL_NONE:
389         CeedCallBackend(CeedVectorSetArray(impl->q_vecs_in[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_data[i]));
390         break;
391       case CEED_EVAL_INTERP:
392       case CEED_EVAL_GRAD:
393       case CEED_EVAL_DIV:
394       case CEED_EVAL_CURL:
395         CeedCallBackend(CeedOperatorFieldGetBasis(op_input_fields[i], &basis));
396         CeedCallBackend(CeedBasisApply(basis, num_elem, CEED_NOTRANSPOSE, eval_mode, impl->e_vecs[i], impl->q_vecs_in[i]));
397         break;
398       case CEED_EVAL_WEIGHT:
399         break;  // No action
400     }
401   }
402   return CEED_ERROR_SUCCESS;
403 }
404 
405 //------------------------------------------------------------------------------
406 // Restore Input Vectors
407 //------------------------------------------------------------------------------
408 static inline int CeedOperatorRestoreInputs_Hip(CeedInt num_input_fields, CeedQFunctionField *qf_input_fields, CeedOperatorField *op_input_fields,
409                                                 const bool skip_active, CeedScalar *e_data[2 * CEED_FIELD_MAX], CeedOperator_Hip *impl) {
410   for (CeedInt i = 0; i < num_input_fields; i++) {
411     CeedEvalMode eval_mode;
412     CeedVector   vec;
413 
414     // Skip active input
415     if (skip_active) {
416       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
417       if (vec == CEED_VECTOR_ACTIVE) continue;
418     }
419     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
420     if (eval_mode == CEED_EVAL_WEIGHT) {  // Skip
421     } else {
422       if (!impl->e_vecs[i]) {  // This was a skip_restriction case
423         CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
424         CeedCallBackend(CeedVectorRestoreArrayRead(vec, (const CeedScalar **)&e_data[i]));
425       } else {
426         CeedCallBackend(CeedVectorRestoreArrayRead(impl->e_vecs[i], (const CeedScalar **)&e_data[i]));
427       }
428     }
429   }
430   return CEED_ERROR_SUCCESS;
431 }
432 
433 //------------------------------------------------------------------------------
434 // Apply and add to output
435 //------------------------------------------------------------------------------
436 static int CeedOperatorApplyAdd_Hip(CeedOperator op, CeedVector in_vec, CeedVector out_vec, CeedRequest *request) {
437   CeedInt             Q, num_elem, elem_size, num_input_fields, num_output_fields, size;
438   CeedScalar         *e_data[2 * CEED_FIELD_MAX] = {NULL};
439   CeedQFunctionField *qf_input_fields, *qf_output_fields;
440   CeedQFunction       qf;
441   CeedOperatorField  *op_input_fields, *op_output_fields;
442   CeedOperator_Hip   *impl;
443 
444   CeedCallBackend(CeedOperatorGetData(op, &impl));
445   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
446   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
447   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
448   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
449   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
450 
451   // Setup
452   CeedCallBackend(CeedOperatorSetup_Hip(op));
453 
454   // Input Evecs and Restriction
455   CeedCallBackend(CeedOperatorSetupInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, in_vec, false, e_data, impl, request));
456 
457   // Input basis apply if needed
458   CeedCallBackend(CeedOperatorInputBasis_Hip(num_elem, qf_input_fields, op_input_fields, num_input_fields, false, e_data, impl));
459 
460   // Output pointers, as necessary
461   for (CeedInt i = 0; i < num_output_fields; i++) {
462     CeedEvalMode eval_mode;
463 
464     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
465     if (eval_mode == CEED_EVAL_NONE) {
466       // Set the output Q-Vector to use the E-Vector data directly.
467       CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs[i + impl->num_inputs], CEED_MEM_DEVICE, &e_data[i + num_input_fields]));
468       CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_data[i + num_input_fields]));
469     }
470   }
471 
472   // Q function
473   CeedCallBackend(CeedQFunctionApply(qf, num_elem * Q, impl->q_vecs_in, impl->q_vecs_out));
474 
475   // Restore input arrays
476   CeedCallBackend(CeedOperatorRestoreInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, false, e_data, impl));
477 
478   // Output basis apply if needed
479   for (CeedInt i = 0; i < num_output_fields; i++) {
480     CeedEvalMode        eval_mode;
481     CeedElemRestriction elem_rstr;
482     CeedBasis           basis;
483 
484     // Get elem_size, eval_mode, size
485     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[i], &elem_rstr));
486     CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
487     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
488     CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[i], &size));
489     // Basis action
490     switch (eval_mode) {
491       case CEED_EVAL_NONE:
492         break;  // No action
493       case CEED_EVAL_INTERP:
494       case CEED_EVAL_GRAD:
495       case CEED_EVAL_DIV:
496       case CEED_EVAL_CURL:
497         CeedCallBackend(CeedOperatorFieldGetBasis(op_output_fields[i], &basis));
498         if (impl->apply_add_basis_out[i]) {
499           CeedCallBackend(CeedBasisApplyAdd(basis, num_elem, CEED_TRANSPOSE, eval_mode, impl->q_vecs_out[i], impl->e_vecs[i + impl->num_inputs]));
500         } else {
501           CeedCallBackend(CeedBasisApply(basis, num_elem, CEED_TRANSPOSE, eval_mode, impl->q_vecs_out[i], impl->e_vecs[i + impl->num_inputs]));
502         }
503         break;
504       // LCOV_EXCL_START
505       case CEED_EVAL_WEIGHT: {
506         return CeedError(CeedOperatorReturnCeed(op), CEED_ERROR_BACKEND, "CEED_EVAL_WEIGHT cannot be an output evaluation mode");
507         // LCOV_EXCL_STOP
508       }
509     }
510   }
511 
512   // Output restriction
513   for (CeedInt i = 0; i < num_output_fields; i++) {
514     CeedEvalMode        eval_mode;
515     CeedVector          vec;
516     CeedElemRestriction elem_rstr;
517 
518     // Restore evec
519     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
520     if (eval_mode == CEED_EVAL_NONE) {
521       CeedCallBackend(CeedVectorRestoreArray(impl->e_vecs[i + impl->num_inputs], &e_data[i + num_input_fields]));
522     }
523     if (impl->skip_rstr_out[i]) continue;
524     // Get output vector
525     CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &vec));
526     // Restrict
527     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[i], &elem_rstr));
528     // Active
529     if (vec == CEED_VECTOR_ACTIVE) vec = out_vec;
530 
531     CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_TRANSPOSE, impl->e_vecs[i + impl->num_inputs], vec, request));
532   }
533   return CEED_ERROR_SUCCESS;
534 }
535 
536 //------------------------------------------------------------------------------
537 // CeedOperator needs to connect all the named fields (be they active or passive) to the named inputs and outputs of its CeedQFunction.
538 //------------------------------------------------------------------------------
539 static int CeedOperatorSetupAtPoints_Hip(CeedOperator op) {
540   Ceed                ceed;
541   bool                is_setup_done;
542   CeedInt             max_num_points = -1, num_elem, num_input_fields, num_output_fields;
543   CeedQFunctionField *qf_input_fields, *qf_output_fields;
544   CeedQFunction       qf;
545   CeedOperatorField  *op_input_fields, *op_output_fields;
546   CeedOperator_Hip   *impl;
547 
548   CeedCallBackend(CeedOperatorIsSetupDone(op, &is_setup_done));
549   if (is_setup_done) return CEED_ERROR_SUCCESS;
550 
551   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
552   CeedCallBackend(CeedOperatorGetData(op, &impl));
553   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
554   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
555   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
556   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
557   {
558     CeedElemRestriction elem_rstr = NULL;
559 
560     CeedCallBackend(CeedOperatorAtPointsGetPoints(op, &elem_rstr, NULL));
561     CeedCallBackend(CeedElemRestrictionGetMaxPointsInElement(elem_rstr, &max_num_points));
562   }
563   impl->max_num_points = max_num_points;
564 
565   // Allocate
566   CeedCallBackend(CeedCalloc(num_input_fields + num_output_fields, &impl->e_vecs));
567   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->skip_rstr_in));
568   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->skip_rstr_out));
569   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->apply_add_basis_out));
570   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->input_states));
571   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->q_vecs_in));
572   CeedCallBackend(CeedCalloc(CEED_FIELD_MAX, &impl->q_vecs_out));
573   impl->num_inputs  = num_input_fields;
574   impl->num_outputs = num_output_fields;
575 
576   // Set up infield and outfield e_vecs and q_vecs
577   // Infields
578   CeedCallBackend(CeedOperatorSetupFields_Hip(qf, op, true, true, impl->skip_rstr_in, NULL, impl->e_vecs, impl->q_vecs_in, 0, num_input_fields,
579                                               max_num_points, num_elem));
580   // Outfields
581   CeedCallBackend(CeedOperatorSetupFields_Hip(qf, op, false, true, impl->skip_rstr_out, impl->apply_add_basis_out, impl->e_vecs, impl->q_vecs_out,
582                                               num_input_fields, num_output_fields, max_num_points, num_elem));
583 
584   CeedCallBackend(CeedOperatorSetSetupDone(op));
585   return CEED_ERROR_SUCCESS;
586 }
587 
588 //------------------------------------------------------------------------------
589 // Input Basis Action AtPoints
590 //------------------------------------------------------------------------------
591 static inline int CeedOperatorInputBasisAtPoints_Hip(CeedInt num_elem, const CeedInt *num_points, CeedQFunctionField *qf_input_fields,
592                                                      CeedOperatorField *op_input_fields, CeedInt num_input_fields, const bool skip_active,
593                                                      CeedScalar *e_data[2 * CEED_FIELD_MAX], CeedOperator_Hip *impl) {
594   for (CeedInt i = 0; i < num_input_fields; i++) {
595     CeedInt             elem_size, size;
596     CeedEvalMode        eval_mode;
597     CeedElemRestriction elem_rstr;
598     CeedBasis           basis;
599 
600     // Skip active input
601     if (skip_active) {
602       CeedVector vec;
603 
604       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
605       if (vec == CEED_VECTOR_ACTIVE) continue;
606     }
607     // Get elem_size, eval_mode, size
608     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &elem_rstr));
609     CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
610     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
611     CeedCallBackend(CeedQFunctionFieldGetSize(qf_input_fields[i], &size));
612     // Basis action
613     switch (eval_mode) {
614       case CEED_EVAL_NONE:
615         CeedCallBackend(CeedVectorSetArray(impl->q_vecs_in[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_data[i]));
616         break;
617       case CEED_EVAL_INTERP:
618       case CEED_EVAL_GRAD:
619       case CEED_EVAL_DIV:
620       case CEED_EVAL_CURL:
621         CeedCallBackend(CeedOperatorFieldGetBasis(op_input_fields[i], &basis));
622         CeedCallBackend(CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_NOTRANSPOSE, eval_mode, impl->point_coords_elem, impl->e_vecs[i],
623                                                impl->q_vecs_in[i]));
624         break;
625       case CEED_EVAL_WEIGHT:
626         break;  // No action
627     }
628   }
629   return CEED_ERROR_SUCCESS;
630 }
631 
632 //------------------------------------------------------------------------------
633 // Apply and add to output AtPoints
634 //------------------------------------------------------------------------------
635 static int CeedOperatorApplyAddAtPoints_Hip(CeedOperator op, CeedVector in_vec, CeedVector out_vec, CeedRequest *request) {
636   CeedInt             max_num_points, num_elem, elem_size, num_input_fields, num_output_fields, size;
637   CeedScalar         *e_data[2 * CEED_FIELD_MAX] = {NULL};
638   CeedQFunctionField *qf_input_fields, *qf_output_fields;
639   CeedQFunction       qf;
640   CeedOperatorField  *op_input_fields, *op_output_fields;
641   CeedOperator_Hip   *impl;
642 
643   CeedCallBackend(CeedOperatorGetData(op, &impl));
644   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
645   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
646   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
647   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
648   CeedInt num_points[num_elem];
649 
650   // Setup
651   CeedCallBackend(CeedOperatorSetupAtPoints_Hip(op));
652   max_num_points = impl->max_num_points;
653   for (CeedInt i = 0; i < num_elem; i++) num_points[i] = max_num_points;
654 
655   // Input Evecs and Restriction
656   CeedCallBackend(CeedOperatorSetupInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, in_vec, false, e_data, impl, request));
657 
658   // Get point coordinates
659   if (!impl->point_coords_elem) {
660     CeedVector          point_coords = NULL;
661     CeedElemRestriction rstr_points  = NULL;
662 
663     CeedCallBackend(CeedOperatorAtPointsGetPoints(op, &rstr_points, &point_coords));
664     CeedCallBackend(CeedElemRestrictionCreateVector(rstr_points, NULL, &impl->point_coords_elem));
665     CeedCallBackend(CeedElemRestrictionApply(rstr_points, CEED_NOTRANSPOSE, point_coords, impl->point_coords_elem, request));
666   }
667 
668   // Input basis apply if needed
669   CeedCallBackend(CeedOperatorInputBasisAtPoints_Hip(num_elem, num_points, qf_input_fields, op_input_fields, num_input_fields, false, e_data, impl));
670 
671   // Output pointers, as necessary
672   for (CeedInt i = 0; i < num_output_fields; i++) {
673     CeedEvalMode eval_mode;
674 
675     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
676     if (eval_mode == CEED_EVAL_NONE) {
677       // Set the output Q-Vector to use the E-Vector data directly.
678       CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs[i + impl->num_inputs], CEED_MEM_DEVICE, &e_data[i + num_input_fields]));
679       CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_data[i + num_input_fields]));
680     }
681   }
682 
683   // Q function
684   CeedCallBackend(CeedQFunctionApply(qf, num_elem * max_num_points, impl->q_vecs_in, impl->q_vecs_out));
685 
686   // Output basis apply if needed
687   for (CeedInt i = 0; i < num_output_fields; i++) {
688     CeedEvalMode        eval_mode;
689     CeedElemRestriction elem_rstr;
690     CeedBasis           basis;
691 
692     // Get elem_size, eval_mode, size
693     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[i], &elem_rstr));
694     CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
695     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
696     CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[i], &size));
697     // Basis action
698     switch (eval_mode) {
699       case CEED_EVAL_NONE:
700         break;  // No action
701       case CEED_EVAL_INTERP:
702       case CEED_EVAL_GRAD:
703       case CEED_EVAL_DIV:
704       case CEED_EVAL_CURL:
705         CeedCallBackend(CeedOperatorFieldGetBasis(op_output_fields[i], &basis));
706         if (impl->apply_add_basis_out[i]) {
707           CeedCallBackend(CeedBasisApplyAddAtPoints(basis, num_elem, num_points, CEED_TRANSPOSE, eval_mode, impl->point_coords_elem,
708                                                     impl->q_vecs_out[i], impl->e_vecs[i + impl->num_inputs]));
709         } else {
710           CeedCallBackend(CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_TRANSPOSE, eval_mode, impl->point_coords_elem, impl->q_vecs_out[i],
711                                                  impl->e_vecs[i + impl->num_inputs]));
712         }
713         break;
714       // LCOV_EXCL_START
715       case CEED_EVAL_WEIGHT: {
716         return CeedError(CeedOperatorReturnCeed(op), CEED_ERROR_BACKEND, "CEED_EVAL_WEIGHT cannot be an output evaluation mode");
717         // LCOV_EXCL_STOP
718       }
719     }
720   }
721 
722   // Output restriction
723   for (CeedInt i = 0; i < num_output_fields; i++) {
724     CeedEvalMode        eval_mode;
725     CeedVector          vec;
726     CeedElemRestriction elem_rstr;
727 
728     // Restore evec
729     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
730     if (eval_mode == CEED_EVAL_NONE) {
731       CeedCallBackend(CeedVectorRestoreArray(impl->e_vecs[i + impl->num_inputs], &e_data[i + num_input_fields]));
732     }
733     if (impl->skip_rstr_out[i]) continue;
734     // Get output vector
735     CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &vec));
736     // Restrict
737     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[i], &elem_rstr));
738     // Active
739     if (vec == CEED_VECTOR_ACTIVE) vec = out_vec;
740 
741     CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_TRANSPOSE, impl->e_vecs[i + impl->num_inputs], vec, request));
742   }
743 
744   // Restore input arrays
745   CeedCallBackend(CeedOperatorRestoreInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, false, e_data, impl));
746   return CEED_ERROR_SUCCESS;
747 }
748 
749 //------------------------------------------------------------------------------
750 // Linear QFunction Assembly Core
751 //------------------------------------------------------------------------------
752 static inline int CeedOperatorLinearAssembleQFunctionCore_Hip(CeedOperator op, bool build_objects, CeedVector *assembled, CeedElemRestriction *rstr,
753                                                               CeedRequest *request) {
754   Ceed                ceed, ceed_parent;
755   CeedInt             num_active_in, num_active_out, Q, num_elem, num_input_fields, num_output_fields, size;
756   CeedScalar         *assembled_array, *e_data[2 * CEED_FIELD_MAX] = {NULL};
757   CeedVector         *active_inputs;
758   CeedQFunctionField *qf_input_fields, *qf_output_fields;
759   CeedQFunction       qf;
760   CeedOperatorField  *op_input_fields, *op_output_fields;
761   CeedOperator_Hip   *impl;
762 
763   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
764   CeedCallBackend(CeedOperatorGetFallbackParentCeed(op, &ceed_parent));
765   CeedCallBackend(CeedOperatorGetData(op, &impl));
766   CeedCallBackend(CeedOperatorGetNumQuadraturePoints(op, &Q));
767   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
768   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
769   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
770   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
771   active_inputs = impl->qf_active_in;
772   num_active_in = impl->num_active_in, num_active_out = impl->num_active_out;
773 
774   // Setup
775   CeedCallBackend(CeedOperatorSetup_Hip(op));
776 
777   // Input Evecs and Restriction
778   CeedCallBackend(CeedOperatorSetupInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, NULL, true, e_data, impl, request));
779 
780   // Count number of active input fields
781   if (!num_active_in) {
782     for (CeedInt i = 0; i < num_input_fields; i++) {
783       CeedScalar *q_vec_array;
784       CeedVector  vec;
785 
786       // Get input vector
787       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
788       // Check if active input
789       if (vec == CEED_VECTOR_ACTIVE) {
790         CeedCallBackend(CeedQFunctionFieldGetSize(qf_input_fields[i], &size));
791         CeedCallBackend(CeedVectorSetValue(impl->q_vecs_in[i], 0.0));
792         CeedCallBackend(CeedVectorGetArray(impl->q_vecs_in[i], CEED_MEM_DEVICE, &q_vec_array));
793         CeedCallBackend(CeedRealloc(num_active_in + size, &active_inputs));
794         for (CeedInt field = 0; field < size; field++) {
795           CeedSize q_size = (CeedSize)Q * num_elem;
796 
797           CeedCallBackend(CeedVectorCreate(ceed, q_size, &active_inputs[num_active_in + field]));
798           CeedCallBackend(
799               CeedVectorSetArray(active_inputs[num_active_in + field], CEED_MEM_DEVICE, CEED_USE_POINTER, &q_vec_array[field * Q * num_elem]));
800         }
801         num_active_in += size;
802         CeedCallBackend(CeedVectorRestoreArray(impl->q_vecs_in[i], &q_vec_array));
803       }
804     }
805     impl->num_active_in = num_active_in;
806     impl->qf_active_in  = active_inputs;
807   }
808 
809   // Count number of active output fields
810   if (!num_active_out) {
811     for (CeedInt i = 0; i < num_output_fields; i++) {
812       CeedVector vec;
813 
814       // Get output vector
815       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[i], &vec));
816       // Check if active output
817       if (vec == CEED_VECTOR_ACTIVE) {
818         CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[i], &size));
819         num_active_out += size;
820       }
821     }
822     impl->num_active_out = num_active_out;
823   }
824 
825   // Check sizes
826   CeedCheck(num_active_in > 0 && num_active_out > 0, ceed, CEED_ERROR_BACKEND, "Cannot assemble QFunction without active inputs and outputs");
827 
828   // Build objects if needed
829   if (build_objects) {
830     CeedSize l_size     = (CeedSize)num_elem * Q * num_active_in * num_active_out;
831     CeedInt  strides[3] = {1, num_elem * Q, Q}; /* *NOPAD* */
832 
833     // Create output restriction
834     CeedCallBackend(CeedElemRestrictionCreateStrided(ceed_parent, num_elem, Q, num_active_in * num_active_out,
835                                                      (CeedSize)num_active_in * (CeedSize)num_active_out * (CeedSize)num_elem * (CeedSize)Q, strides,
836                                                      rstr));
837     // Create assembled vector
838     CeedCallBackend(CeedVectorCreate(ceed_parent, l_size, assembled));
839   }
840   CeedCallBackend(CeedVectorSetValue(*assembled, 0.0));
841   CeedCallBackend(CeedVectorGetArray(*assembled, CEED_MEM_DEVICE, &assembled_array));
842 
843   // Input basis apply
844   CeedCallBackend(CeedOperatorInputBasis_Hip(num_elem, qf_input_fields, op_input_fields, num_input_fields, true, e_data, impl));
845 
846   // Assemble QFunction
847   for (CeedInt in = 0; in < num_active_in; in++) {
848     // Set Inputs
849     CeedCallBackend(CeedVectorSetValue(active_inputs[in], 1.0));
850     if (num_active_in > 1) {
851       CeedCallBackend(CeedVectorSetValue(active_inputs[(in + num_active_in - 1) % num_active_in], 0.0));
852     }
853     // Set Outputs
854     for (CeedInt out = 0; out < num_output_fields; out++) {
855       CeedVector vec;
856 
857       // Get output vector
858       CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[out], &vec));
859       // Check if active output
860       if (vec == CEED_VECTOR_ACTIVE) {
861         CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[out], CEED_MEM_DEVICE, CEED_USE_POINTER, assembled_array));
862         CeedCallBackend(CeedQFunctionFieldGetSize(qf_output_fields[out], &size));
863         assembled_array += size * Q * num_elem;  // Advance the pointer by the size of the output
864       }
865     }
866     // Apply QFunction
867     CeedCallBackend(CeedQFunctionApply(qf, Q * num_elem, impl->q_vecs_in, impl->q_vecs_out));
868   }
869 
870   // Un-set output q_vecs to prevent accidental overwrite of Assembled
871   for (CeedInt out = 0; out < num_output_fields; out++) {
872     CeedVector vec;
873 
874     // Get output vector
875     CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[out], &vec));
876     // Check if active output
877     if (vec == CEED_VECTOR_ACTIVE) {
878       CeedCallBackend(CeedVectorTakeArray(impl->q_vecs_out[out], CEED_MEM_DEVICE, NULL));
879     }
880   }
881 
882   // Restore input arrays
883   CeedCallBackend(CeedOperatorRestoreInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, true, e_data, impl));
884 
885   // Restore output
886   CeedCallBackend(CeedVectorRestoreArray(*assembled, &assembled_array));
887   return CEED_ERROR_SUCCESS;
888 }
889 
890 //------------------------------------------------------------------------------
891 // Assemble Linear QFunction
892 //------------------------------------------------------------------------------
893 static int CeedOperatorLinearAssembleQFunction_Hip(CeedOperator op, CeedVector *assembled, CeedElemRestriction *rstr, CeedRequest *request) {
894   return CeedOperatorLinearAssembleQFunctionCore_Hip(op, true, assembled, rstr, request);
895 }
896 
897 //------------------------------------------------------------------------------
898 // Update Assembled Linear QFunction
899 //------------------------------------------------------------------------------
900 static int CeedOperatorLinearAssembleQFunctionUpdate_Hip(CeedOperator op, CeedVector assembled, CeedElemRestriction rstr, CeedRequest *request) {
901   return CeedOperatorLinearAssembleQFunctionCore_Hip(op, false, &assembled, &rstr, request);
902 }
903 
904 //------------------------------------------------------------------------------
905 // Assemble Diagonal Setup
906 //------------------------------------------------------------------------------
907 static inline int CeedOperatorAssembleDiagonalSetup_Hip(CeedOperator op) {
908   Ceed                ceed;
909   CeedInt             num_input_fields, num_output_fields, num_eval_modes_in = 0, num_eval_modes_out = 0;
910   CeedInt             q_comp, num_nodes, num_qpts;
911   CeedEvalMode       *eval_modes_in = NULL, *eval_modes_out = NULL;
912   CeedBasis           basis_in = NULL, basis_out = NULL;
913   CeedQFunctionField *qf_fields;
914   CeedQFunction       qf;
915   CeedOperatorField  *op_fields;
916   CeedOperator_Hip   *impl;
917 
918   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
919   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
920   CeedCallBackend(CeedQFunctionGetNumArgs(qf, &num_input_fields, &num_output_fields));
921 
922   // Determine active input basis
923   CeedCallBackend(CeedOperatorGetFields(op, NULL, &op_fields, NULL, NULL));
924   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
925   for (CeedInt i = 0; i < num_input_fields; i++) {
926     CeedVector vec;
927 
928     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
929     if (vec == CEED_VECTOR_ACTIVE) {
930       CeedBasis    basis;
931       CeedEvalMode eval_mode;
932 
933       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
934       CeedCheck(!basis_in || basis_in == basis, ceed, CEED_ERROR_BACKEND,
935                 "Backend does not implement operator diagonal assembly with multiple active bases");
936       basis_in = basis;
937       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
938       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_mode, &q_comp));
939       if (eval_mode != CEED_EVAL_WEIGHT) {
940         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF assembly
941         CeedCallBackend(CeedRealloc(num_eval_modes_in + q_comp, &eval_modes_in));
942         for (CeedInt d = 0; d < q_comp; d++) eval_modes_in[num_eval_modes_in + d] = eval_mode;
943         num_eval_modes_in += q_comp;
944       }
945     }
946   }
947 
948   // Determine active output basis
949   CeedCallBackend(CeedOperatorGetFields(op, NULL, NULL, NULL, &op_fields));
950   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
951   for (CeedInt i = 0; i < num_output_fields; i++) {
952     CeedVector vec;
953 
954     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
955     if (vec == CEED_VECTOR_ACTIVE) {
956       CeedBasis    basis;
957       CeedEvalMode eval_mode;
958 
959       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis));
960       CeedCheck(!basis_out || basis_out == basis, ceed, CEED_ERROR_BACKEND,
961                 "Backend does not implement operator diagonal assembly with multiple active bases");
962       basis_out = basis;
963       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
964       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_mode, &q_comp));
965       if (eval_mode != CEED_EVAL_WEIGHT) {
966         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF assembly
967         CeedCallBackend(CeedRealloc(num_eval_modes_out + q_comp, &eval_modes_out));
968         for (CeedInt d = 0; d < q_comp; d++) eval_modes_out[num_eval_modes_out + d] = eval_mode;
969         num_eval_modes_out += q_comp;
970       }
971     }
972   }
973 
974   // Operator data struct
975   CeedCallBackend(CeedOperatorGetData(op, &impl));
976   CeedCallBackend(CeedCalloc(1, &impl->diag));
977   CeedOperatorDiag_Hip *diag = impl->diag;
978 
979   // Basis matrices
980   CeedCallBackend(CeedBasisGetNumNodes(basis_in, &num_nodes));
981   if (basis_in == CEED_BASIS_NONE) num_qpts = num_nodes;
982   else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_in, &num_qpts));
983   const CeedInt interp_bytes     = num_nodes * num_qpts * sizeof(CeedScalar);
984   const CeedInt eval_modes_bytes = sizeof(CeedEvalMode);
985   bool          has_eval_none    = false;
986 
987   // CEED_EVAL_NONE
988   for (CeedInt i = 0; i < num_eval_modes_in; i++) has_eval_none = has_eval_none || (eval_modes_in[i] == CEED_EVAL_NONE);
989   for (CeedInt i = 0; i < num_eval_modes_out; i++) has_eval_none = has_eval_none || (eval_modes_out[i] == CEED_EVAL_NONE);
990   if (has_eval_none) {
991     CeedScalar *identity = NULL;
992 
993     CeedCallBackend(CeedCalloc(num_nodes * num_qpts, &identity));
994     for (CeedInt i = 0; i < (num_nodes < num_qpts ? num_nodes : num_qpts); i++) identity[i * num_nodes + i] = 1.0;
995     CeedCallHip(ceed, hipMalloc((void **)&diag->d_identity, interp_bytes));
996     CeedCallHip(ceed, hipMemcpy(diag->d_identity, identity, interp_bytes, hipMemcpyHostToDevice));
997     CeedCallBackend(CeedFree(&identity));
998   }
999 
1000   // CEED_EVAL_INTERP, CEED_EVAL_GRAD, CEED_EVAL_DIV, and CEED_EVAL_CURL
1001   for (CeedInt in = 0; in < 2; in++) {
1002     CeedFESpace fespace;
1003     CeedBasis   basis = in ? basis_in : basis_out;
1004 
1005     CeedCallBackend(CeedBasisGetFESpace(basis, &fespace));
1006     switch (fespace) {
1007       case CEED_FE_SPACE_H1: {
1008         CeedInt           q_comp_interp, q_comp_grad;
1009         const CeedScalar *interp, *grad;
1010         CeedScalar       *d_interp, *d_grad;
1011 
1012         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_INTERP, &q_comp_interp));
1013         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_GRAD, &q_comp_grad));
1014 
1015         CeedCallBackend(CeedBasisGetInterp(basis, &interp));
1016         CeedCallHip(ceed, hipMalloc((void **)&d_interp, interp_bytes * q_comp_interp));
1017         CeedCallHip(ceed, hipMemcpy(d_interp, interp, interp_bytes * q_comp_interp, hipMemcpyHostToDevice));
1018         CeedCallBackend(CeedBasisGetGrad(basis, &grad));
1019         CeedCallHip(ceed, hipMalloc((void **)&d_grad, interp_bytes * q_comp_grad));
1020         CeedCallHip(ceed, hipMemcpy(d_grad, grad, interp_bytes * q_comp_grad, hipMemcpyHostToDevice));
1021         if (in) {
1022           diag->d_interp_in = d_interp;
1023           diag->d_grad_in   = d_grad;
1024         } else {
1025           diag->d_interp_out = d_interp;
1026           diag->d_grad_out   = d_grad;
1027         }
1028       } break;
1029       case CEED_FE_SPACE_HDIV: {
1030         CeedInt           q_comp_interp, q_comp_div;
1031         const CeedScalar *interp, *div;
1032         CeedScalar       *d_interp, *d_div;
1033 
1034         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_INTERP, &q_comp_interp));
1035         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_DIV, &q_comp_div));
1036 
1037         CeedCallBackend(CeedBasisGetInterp(basis, &interp));
1038         CeedCallHip(ceed, hipMalloc((void **)&d_interp, interp_bytes * q_comp_interp));
1039         CeedCallHip(ceed, hipMemcpy(d_interp, interp, interp_bytes * q_comp_interp, hipMemcpyHostToDevice));
1040         CeedCallBackend(CeedBasisGetDiv(basis, &div));
1041         CeedCallHip(ceed, hipMalloc((void **)&d_div, interp_bytes * q_comp_div));
1042         CeedCallHip(ceed, hipMemcpy(d_div, div, interp_bytes * q_comp_div, hipMemcpyHostToDevice));
1043         if (in) {
1044           diag->d_interp_in = d_interp;
1045           diag->d_div_in    = d_div;
1046         } else {
1047           diag->d_interp_out = d_interp;
1048           diag->d_div_out    = d_div;
1049         }
1050       } break;
1051       case CEED_FE_SPACE_HCURL: {
1052         CeedInt           q_comp_interp, q_comp_curl;
1053         const CeedScalar *interp, *curl;
1054         CeedScalar       *d_interp, *d_curl;
1055 
1056         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_INTERP, &q_comp_interp));
1057         CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis, CEED_EVAL_CURL, &q_comp_curl));
1058 
1059         CeedCallBackend(CeedBasisGetInterp(basis, &interp));
1060         CeedCallHip(ceed, hipMalloc((void **)&d_interp, interp_bytes * q_comp_interp));
1061         CeedCallHip(ceed, hipMemcpy(d_interp, interp, interp_bytes * q_comp_interp, hipMemcpyHostToDevice));
1062         CeedCallBackend(CeedBasisGetCurl(basis, &curl));
1063         CeedCallHip(ceed, hipMalloc((void **)&d_curl, interp_bytes * q_comp_curl));
1064         CeedCallHip(ceed, hipMemcpy(d_curl, curl, interp_bytes * q_comp_curl, hipMemcpyHostToDevice));
1065         if (in) {
1066           diag->d_interp_in = d_interp;
1067           diag->d_curl_in   = d_curl;
1068         } else {
1069           diag->d_interp_out = d_interp;
1070           diag->d_curl_out   = d_curl;
1071         }
1072       } break;
1073     }
1074   }
1075 
1076   // Arrays of eval_modes
1077   CeedCallHip(ceed, hipMalloc((void **)&diag->d_eval_modes_in, num_eval_modes_in * eval_modes_bytes));
1078   CeedCallHip(ceed, hipMemcpy(diag->d_eval_modes_in, eval_modes_in, num_eval_modes_in * eval_modes_bytes, hipMemcpyHostToDevice));
1079   CeedCallHip(ceed, hipMalloc((void **)&diag->d_eval_modes_out, num_eval_modes_out * eval_modes_bytes));
1080   CeedCallHip(ceed, hipMemcpy(diag->d_eval_modes_out, eval_modes_out, num_eval_modes_out * eval_modes_bytes, hipMemcpyHostToDevice));
1081   CeedCallBackend(CeedFree(&eval_modes_in));
1082   CeedCallBackend(CeedFree(&eval_modes_out));
1083   return CEED_ERROR_SUCCESS;
1084 }
1085 
1086 //------------------------------------------------------------------------------
1087 // Assemble Diagonal Setup (Compilation)
1088 //------------------------------------------------------------------------------
1089 static inline int CeedOperatorAssembleDiagonalSetupCompile_Hip(CeedOperator op, CeedInt use_ceedsize_idx, const bool is_point_block) {
1090   Ceed                ceed;
1091   char               *diagonal_kernel_source;
1092   const char         *diagonal_kernel_path;
1093   CeedInt             num_input_fields, num_output_fields, num_eval_modes_in = 0, num_eval_modes_out = 0;
1094   CeedInt             num_comp, q_comp, num_nodes, num_qpts;
1095   CeedBasis           basis_in = NULL, basis_out = NULL;
1096   CeedQFunctionField *qf_fields;
1097   CeedQFunction       qf;
1098   CeedOperatorField  *op_fields;
1099   CeedOperator_Hip   *impl;
1100 
1101   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1102   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
1103   CeedCallBackend(CeedQFunctionGetNumArgs(qf, &num_input_fields, &num_output_fields));
1104 
1105   // Determine active input basis
1106   CeedCallBackend(CeedOperatorGetFields(op, NULL, &op_fields, NULL, NULL));
1107   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
1108   for (CeedInt i = 0; i < num_input_fields; i++) {
1109     CeedVector vec;
1110 
1111     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
1112     if (vec == CEED_VECTOR_ACTIVE) {
1113       CeedEvalMode eval_mode;
1114 
1115       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis_in));
1116       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1117       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_mode, &q_comp));
1118       if (eval_mode != CEED_EVAL_WEIGHT) {
1119         num_eval_modes_in += q_comp;
1120       }
1121     }
1122   }
1123 
1124   // Determine active output basis
1125   CeedCallBackend(CeedOperatorGetFields(op, NULL, NULL, NULL, &op_fields));
1126   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
1127   for (CeedInt i = 0; i < num_output_fields; i++) {
1128     CeedVector vec;
1129 
1130     CeedCallBackend(CeedOperatorFieldGetVector(op_fields[i], &vec));
1131     if (vec == CEED_VECTOR_ACTIVE) {
1132       CeedEvalMode eval_mode;
1133 
1134       CeedCallBackend(CeedOperatorFieldGetBasis(op_fields[i], &basis_out));
1135       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1136       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_mode, &q_comp));
1137       if (eval_mode != CEED_EVAL_WEIGHT) {
1138         num_eval_modes_out += q_comp;
1139       }
1140     }
1141   }
1142 
1143   // Operator data struct
1144   CeedCallBackend(CeedOperatorGetData(op, &impl));
1145   CeedOperatorDiag_Hip *diag = impl->diag;
1146 
1147   // Assemble kernel
1148   hipModule_t *module          = is_point_block ? &diag->module_point_block : &diag->module;
1149   CeedInt      elems_per_block = 1;
1150   CeedCallBackend(CeedBasisGetNumNodes(basis_in, &num_nodes));
1151   CeedCallBackend(CeedBasisGetNumComponents(basis_in, &num_comp));
1152   if (basis_in == CEED_BASIS_NONE) num_qpts = num_nodes;
1153   else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_in, &num_qpts));
1154   CeedCallBackend(CeedGetJitAbsolutePath(ceed, "ceed/jit-source/hip/hip-ref-operator-assemble-diagonal.h", &diagonal_kernel_path));
1155   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Diagonal Assembly Kernel Source -----\n");
1156   CeedCallBackend(CeedLoadSourceToBuffer(ceed, diagonal_kernel_path, &diagonal_kernel_source));
1157   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Diagonal Assembly Source Complete! -----\n");
1158   CeedCallHip(ceed, CeedCompile_Hip(ceed, diagonal_kernel_source, module, 8, "NUM_EVAL_MODES_IN", num_eval_modes_in, "NUM_EVAL_MODES_OUT",
1159                                     num_eval_modes_out, "NUM_COMP", num_comp, "NUM_NODES", num_nodes, "NUM_QPTS", num_qpts, "USE_CEEDSIZE",
1160                                     use_ceedsize_idx, "USE_POINT_BLOCK", is_point_block ? 1 : 0, "BLOCK_SIZE", num_nodes * elems_per_block));
1161   CeedCallHip(ceed, CeedGetKernel_Hip(ceed, *module, "LinearDiagonal", is_point_block ? &diag->LinearPointBlock : &diag->LinearDiagonal));
1162   CeedCallBackend(CeedFree(&diagonal_kernel_path));
1163   CeedCallBackend(CeedFree(&diagonal_kernel_source));
1164   return CEED_ERROR_SUCCESS;
1165 }
1166 
1167 //------------------------------------------------------------------------------
1168 // Assemble Diagonal Core
1169 //------------------------------------------------------------------------------
1170 static inline int CeedOperatorAssembleDiagonalCore_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request, const bool is_point_block) {
1171   Ceed                ceed;
1172   CeedInt             num_elem, num_nodes;
1173   CeedScalar         *elem_diag_array;
1174   const CeedScalar   *assembled_qf_array;
1175   CeedVector          assembled_qf   = NULL, elem_diag;
1176   CeedElemRestriction assembled_rstr = NULL, rstr_in, rstr_out, diag_rstr;
1177   CeedOperator_Hip   *impl;
1178 
1179   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1180   CeedCallBackend(CeedOperatorGetData(op, &impl));
1181 
1182   // Assemble QFunction
1183   CeedCallBackend(CeedOperatorLinearAssembleQFunctionBuildOrUpdate(op, &assembled_qf, &assembled_rstr, request));
1184   CeedCallBackend(CeedElemRestrictionDestroy(&assembled_rstr));
1185   CeedCallBackend(CeedVectorGetArrayRead(assembled_qf, CEED_MEM_DEVICE, &assembled_qf_array));
1186 
1187   // Setup
1188   if (!impl->diag) CeedCallBackend(CeedOperatorAssembleDiagonalSetup_Hip(op));
1189   CeedOperatorDiag_Hip *diag = impl->diag;
1190 
1191   assert(diag != NULL);
1192 
1193   // Assemble kernel if needed
1194   if ((!is_point_block && !diag->LinearDiagonal) || (is_point_block && !diag->LinearPointBlock)) {
1195     CeedSize assembled_length, assembled_qf_length;
1196     CeedInt  use_ceedsize_idx = 0;
1197     CeedCallBackend(CeedVectorGetLength(assembled, &assembled_length));
1198     CeedCallBackend(CeedVectorGetLength(assembled_qf, &assembled_qf_length));
1199     if ((assembled_length > INT_MAX) || (assembled_qf_length > INT_MAX)) use_ceedsize_idx = 1;
1200 
1201     CeedCallBackend(CeedOperatorAssembleDiagonalSetupCompile_Hip(op, use_ceedsize_idx, is_point_block));
1202   }
1203 
1204   // Restriction and diagonal vector
1205   CeedCallBackend(CeedOperatorGetActiveElemRestrictions(op, &rstr_in, &rstr_out));
1206   CeedCheck(rstr_in == rstr_out, ceed, CEED_ERROR_BACKEND,
1207             "Cannot assemble operator diagonal with different input and output active element restrictions");
1208   if (!is_point_block && !diag->diag_rstr) {
1209     CeedCallBackend(CeedElemRestrictionCreateUnsignedCopy(rstr_out, &diag->diag_rstr));
1210     CeedCallBackend(CeedElemRestrictionCreateVector(diag->diag_rstr, NULL, &diag->elem_diag));
1211   } else if (is_point_block && !diag->point_block_diag_rstr) {
1212     CeedCallBackend(CeedOperatorCreateActivePointBlockRestriction(rstr_out, &diag->point_block_diag_rstr));
1213     CeedCallBackend(CeedElemRestrictionCreateVector(diag->point_block_diag_rstr, NULL, &diag->point_block_elem_diag));
1214   }
1215   diag_rstr = is_point_block ? diag->point_block_diag_rstr : diag->diag_rstr;
1216   elem_diag = is_point_block ? diag->point_block_elem_diag : diag->elem_diag;
1217   CeedCallBackend(CeedVectorSetValue(elem_diag, 0.0));
1218 
1219   // Only assemble diagonal if the basis has nodes, otherwise inputs are null pointers
1220   CeedCallBackend(CeedElemRestrictionGetElementSize(diag_rstr, &num_nodes));
1221   if (num_nodes > 0) {
1222     // Assemble element operator diagonals
1223     CeedCallBackend(CeedVectorGetArray(elem_diag, CEED_MEM_DEVICE, &elem_diag_array));
1224     CeedCallBackend(CeedElemRestrictionGetNumElements(diag_rstr, &num_elem));
1225 
1226     // Compute the diagonal of B^T D B
1227     CeedInt elems_per_block = 1;
1228     CeedInt grid            = CeedDivUpInt(num_elem, elems_per_block);
1229     void   *args[]          = {(void *)&num_elem,      &diag->d_identity,       &diag->d_interp_in,  &diag->d_grad_in, &diag->d_div_in,
1230                                &diag->d_curl_in,       &diag->d_interp_out,     &diag->d_grad_out,   &diag->d_div_out, &diag->d_curl_out,
1231                                &diag->d_eval_modes_in, &diag->d_eval_modes_out, &assembled_qf_array, &elem_diag_array};
1232 
1233     if (is_point_block) {
1234       CeedCallBackend(CeedRunKernelDim_Hip(ceed, diag->LinearPointBlock, grid, num_nodes, 1, elems_per_block, args));
1235     } else {
1236       CeedCallBackend(CeedRunKernelDim_Hip(ceed, diag->LinearDiagonal, grid, num_nodes, 1, elems_per_block, args));
1237     }
1238 
1239     // Restore arrays
1240     CeedCallBackend(CeedVectorRestoreArray(elem_diag, &elem_diag_array));
1241     CeedCallBackend(CeedVectorRestoreArrayRead(assembled_qf, &assembled_qf_array));
1242   }
1243 
1244   // Assemble local operator diagonal
1245   CeedCallBackend(CeedElemRestrictionApply(diag_rstr, CEED_TRANSPOSE, elem_diag, assembled, request));
1246 
1247   // Cleanup
1248   CeedCallBackend(CeedVectorDestroy(&assembled_qf));
1249   return CEED_ERROR_SUCCESS;
1250 }
1251 
1252 //------------------------------------------------------------------------------
1253 // Assemble Linear Diagonal
1254 //------------------------------------------------------------------------------
1255 static int CeedOperatorLinearAssembleAddDiagonal_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request) {
1256   CeedCallBackend(CeedOperatorAssembleDiagonalCore_Hip(op, assembled, request, false));
1257   return CEED_ERROR_SUCCESS;
1258 }
1259 
1260 //------------------------------------------------------------------------------
1261 // Assemble Linear Point Block Diagonal
1262 //------------------------------------------------------------------------------
1263 static int CeedOperatorLinearAssembleAddPointBlockDiagonal_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request) {
1264   CeedCallBackend(CeedOperatorAssembleDiagonalCore_Hip(op, assembled, request, true));
1265   return CEED_ERROR_SUCCESS;
1266 }
1267 
1268 //------------------------------------------------------------------------------
1269 // Single Operator Assembly Setup
1270 //------------------------------------------------------------------------------
1271 static int CeedSingleOperatorAssembleSetup_Hip(CeedOperator op, CeedInt use_ceedsize_idx) {
1272   Ceed                ceed;
1273   char               *assembly_kernel_source;
1274   const char         *assembly_kernel_path;
1275   CeedInt             num_input_fields, num_output_fields, num_eval_modes_in = 0, num_eval_modes_out = 0;
1276   CeedInt             elem_size_in, num_qpts_in = 0, num_comp_in, elem_size_out, num_qpts_out, num_comp_out, q_comp;
1277   CeedEvalMode       *eval_modes_in = NULL, *eval_modes_out = NULL;
1278   CeedElemRestriction rstr_in = NULL, rstr_out = NULL;
1279   CeedBasis           basis_in = NULL, basis_out = NULL;
1280   CeedQFunctionField *qf_fields;
1281   CeedQFunction       qf;
1282   CeedOperatorField  *input_fields, *output_fields;
1283   CeedOperator_Hip   *impl;
1284 
1285   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1286   CeedCallBackend(CeedOperatorGetData(op, &impl));
1287 
1288   // Get intput and output fields
1289   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &input_fields, &num_output_fields, &output_fields));
1290 
1291   // Determine active input basis eval mode
1292   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
1293   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_fields, NULL, NULL));
1294   for (CeedInt i = 0; i < num_input_fields; i++) {
1295     CeedVector vec;
1296 
1297     CeedCallBackend(CeedOperatorFieldGetVector(input_fields[i], &vec));
1298     if (vec == CEED_VECTOR_ACTIVE) {
1299       CeedBasis    basis;
1300       CeedEvalMode eval_mode;
1301 
1302       CeedCallBackend(CeedOperatorFieldGetBasis(input_fields[i], &basis));
1303       CeedCheck(!basis_in || basis_in == basis, ceed, CEED_ERROR_BACKEND, "Backend does not implement operator assembly with multiple active bases");
1304       basis_in = basis;
1305       CeedCallBackend(CeedOperatorFieldGetElemRestriction(input_fields[i], &rstr_in));
1306       CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_in, &elem_size_in));
1307       if (basis_in == CEED_BASIS_NONE) num_qpts_in = elem_size_in;
1308       else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_in, &num_qpts_in));
1309       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1310       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_mode, &q_comp));
1311       if (eval_mode != CEED_EVAL_WEIGHT) {
1312         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF Assembly
1313         CeedCallBackend(CeedRealloc(num_eval_modes_in + q_comp, &eval_modes_in));
1314         for (CeedInt d = 0; d < q_comp; d++) {
1315           eval_modes_in[num_eval_modes_in + d] = eval_mode;
1316         }
1317         num_eval_modes_in += q_comp;
1318       }
1319     }
1320   }
1321 
1322   // Determine active output basis; basis_out and rstr_out only used if same as input, TODO
1323   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, NULL, NULL, &qf_fields));
1324   for (CeedInt i = 0; i < num_output_fields; i++) {
1325     CeedVector vec;
1326 
1327     CeedCallBackend(CeedOperatorFieldGetVector(output_fields[i], &vec));
1328     if (vec == CEED_VECTOR_ACTIVE) {
1329       CeedBasis    basis;
1330       CeedEvalMode eval_mode;
1331 
1332       CeedCallBackend(CeedOperatorFieldGetBasis(output_fields[i], &basis));
1333       CeedCheck(!basis_out || basis_out == basis, ceed, CEED_ERROR_BACKEND,
1334                 "Backend does not implement operator assembly with multiple active bases");
1335       basis_out = basis;
1336       CeedCallBackend(CeedOperatorFieldGetElemRestriction(output_fields[i], &rstr_out));
1337       CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_out, &elem_size_out));
1338       if (basis_out == CEED_BASIS_NONE) num_qpts_out = elem_size_out;
1339       else CeedCallBackend(CeedBasisGetNumQuadraturePoints(basis_out, &num_qpts_out));
1340       CeedCheck(num_qpts_in == num_qpts_out, ceed, CEED_ERROR_UNSUPPORTED,
1341                 "Active input and output bases must have the same number of quadrature points");
1342       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_fields[i], &eval_mode));
1343       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_mode, &q_comp));
1344       if (eval_mode != CEED_EVAL_WEIGHT) {
1345         // q_comp = 1 if CEED_EVAL_NONE, CEED_EVAL_WEIGHT caught by QF Assembly
1346         CeedCallBackend(CeedRealloc(num_eval_modes_out + q_comp, &eval_modes_out));
1347         for (CeedInt d = 0; d < q_comp; d++) {
1348           eval_modes_out[num_eval_modes_out + d] = eval_mode;
1349         }
1350         num_eval_modes_out += q_comp;
1351       }
1352     }
1353   }
1354   CeedCheck(num_eval_modes_in > 0 && num_eval_modes_out > 0, ceed, CEED_ERROR_UNSUPPORTED, "Cannot assemble operator without inputs/outputs");
1355 
1356   CeedCallBackend(CeedCalloc(1, &impl->asmb));
1357   CeedOperatorAssemble_Hip *asmb = impl->asmb;
1358   asmb->elems_per_block          = 1;
1359   asmb->block_size_x             = elem_size_in;
1360   asmb->block_size_y             = elem_size_out;
1361 
1362   bool fallback = asmb->block_size_x * asmb->block_size_y * asmb->elems_per_block > 1024;
1363 
1364   if (fallback) {
1365     // Use fallback kernel with 1D threadblock
1366     asmb->block_size_y = 1;
1367   }
1368 
1369   // Compile kernels
1370   CeedCallBackend(CeedElemRestrictionGetNumComponents(rstr_in, &num_comp_in));
1371   CeedCallBackend(CeedElemRestrictionGetNumComponents(rstr_out, &num_comp_out));
1372   CeedCallBackend(CeedGetJitAbsolutePath(ceed, "ceed/jit-source/hip/hip-ref-operator-assemble.h", &assembly_kernel_path));
1373   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Assembly Kernel Source -----\n");
1374   CeedCallBackend(CeedLoadSourceToBuffer(ceed, assembly_kernel_path, &assembly_kernel_source));
1375   CeedDebug256(ceed, CEED_DEBUG_COLOR_SUCCESS, "----- Loading Assembly Source Complete! -----\n");
1376   CeedCallBackend(CeedCompile_Hip(ceed, assembly_kernel_source, &asmb->module, 10, "NUM_EVAL_MODES_IN", num_eval_modes_in, "NUM_EVAL_MODES_OUT",
1377                                   num_eval_modes_out, "NUM_COMP_IN", num_comp_in, "NUM_COMP_OUT", num_comp_out, "NUM_NODES_IN", elem_size_in,
1378                                   "NUM_NODES_OUT", elem_size_out, "NUM_QPTS", num_qpts_in, "BLOCK_SIZE",
1379                                   asmb->block_size_x * asmb->block_size_y * asmb->elems_per_block, "BLOCK_SIZE_Y", asmb->block_size_y, "USE_CEEDSIZE",
1380                                   use_ceedsize_idx));
1381   CeedCallBackend(CeedGetKernel_Hip(ceed, asmb->module, "LinearAssemble", &asmb->LinearAssemble));
1382   CeedCallBackend(CeedFree(&assembly_kernel_path));
1383   CeedCallBackend(CeedFree(&assembly_kernel_source));
1384 
1385   // Load into B_in, in order that they will be used in eval_modes_in
1386   {
1387     const CeedInt in_bytes           = elem_size_in * num_qpts_in * num_eval_modes_in * sizeof(CeedScalar);
1388     CeedInt       d_in               = 0;
1389     CeedEvalMode  eval_modes_in_prev = CEED_EVAL_NONE;
1390     bool          has_eval_none      = false;
1391     CeedScalar   *identity           = NULL;
1392 
1393     for (CeedInt i = 0; i < num_eval_modes_in; i++) {
1394       has_eval_none = has_eval_none || (eval_modes_in[i] == CEED_EVAL_NONE);
1395     }
1396     if (has_eval_none) {
1397       CeedCallBackend(CeedCalloc(elem_size_in * num_qpts_in, &identity));
1398       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;
1399     }
1400 
1401     CeedCallHip(ceed, hipMalloc((void **)&asmb->d_B_in, in_bytes));
1402     for (CeedInt i = 0; i < num_eval_modes_in; i++) {
1403       const CeedScalar *h_B_in;
1404 
1405       CeedCallBackend(CeedOperatorGetBasisPointer(basis_in, eval_modes_in[i], identity, &h_B_in));
1406       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_in, eval_modes_in[i], &q_comp));
1407       if (q_comp > 1) {
1408         if (i == 0 || eval_modes_in[i] != eval_modes_in_prev) d_in = 0;
1409         else h_B_in = &h_B_in[(++d_in) * elem_size_in * num_qpts_in];
1410       }
1411       eval_modes_in_prev = eval_modes_in[i];
1412 
1413       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),
1414                                   hipMemcpyHostToDevice));
1415     }
1416 
1417     if (identity) {
1418       CeedCallBackend(CeedFree(&identity));
1419     }
1420   }
1421 
1422   // Load into B_out, in order that they will be used in eval_modes_out
1423   {
1424     const CeedInt out_bytes           = elem_size_out * num_qpts_out * num_eval_modes_out * sizeof(CeedScalar);
1425     CeedInt       d_out               = 0;
1426     CeedEvalMode  eval_modes_out_prev = CEED_EVAL_NONE;
1427     bool          has_eval_none       = false;
1428     CeedScalar   *identity            = NULL;
1429 
1430     for (CeedInt i = 0; i < num_eval_modes_out; i++) {
1431       has_eval_none = has_eval_none || (eval_modes_out[i] == CEED_EVAL_NONE);
1432     }
1433     if (has_eval_none) {
1434       CeedCallBackend(CeedCalloc(elem_size_out * num_qpts_out, &identity));
1435       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;
1436     }
1437 
1438     CeedCallHip(ceed, hipMalloc((void **)&asmb->d_B_out, out_bytes));
1439     for (CeedInt i = 0; i < num_eval_modes_out; i++) {
1440       const CeedScalar *h_B_out;
1441 
1442       CeedCallBackend(CeedOperatorGetBasisPointer(basis_out, eval_modes_out[i], identity, &h_B_out));
1443       CeedCallBackend(CeedBasisGetNumQuadratureComponents(basis_out, eval_modes_out[i], &q_comp));
1444       if (q_comp > 1) {
1445         if (i == 0 || eval_modes_out[i] != eval_modes_out_prev) d_out = 0;
1446         else h_B_out = &h_B_out[(++d_out) * elem_size_out * num_qpts_out];
1447       }
1448       eval_modes_out_prev = eval_modes_out[i];
1449 
1450       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),
1451                                   hipMemcpyHostToDevice));
1452     }
1453 
1454     if (identity) {
1455       CeedCallBackend(CeedFree(&identity));
1456     }
1457   }
1458   return CEED_ERROR_SUCCESS;
1459 }
1460 
1461 //------------------------------------------------------------------------------
1462 // Assemble matrix data for COO matrix of assembled operator.
1463 // The sparsity pattern is set by CeedOperatorLinearAssembleSymbolic.
1464 //
1465 // Note that this (and other assembly routines) currently assume only one active input restriction/basis per operator (could have multiple basis eval
1466 // modes).
1467 // TODO: allow multiple active input restrictions/basis objects
1468 //------------------------------------------------------------------------------
1469 static int CeedSingleOperatorAssemble_Hip(CeedOperator op, CeedInt offset, CeedVector values) {
1470   Ceed                ceed;
1471   CeedSize            values_length = 0, assembled_qf_length = 0;
1472   CeedInt             use_ceedsize_idx = 0, num_elem_in, num_elem_out, elem_size_in, elem_size_out;
1473   CeedScalar         *values_array;
1474   const CeedScalar   *assembled_qf_array;
1475   CeedVector          assembled_qf   = NULL;
1476   CeedElemRestriction assembled_rstr = NULL, rstr_in, rstr_out;
1477   CeedRestrictionType rstr_type_in, rstr_type_out;
1478   const bool         *orients_in = NULL, *orients_out = NULL;
1479   const CeedInt8     *curl_orients_in = NULL, *curl_orients_out = NULL;
1480   CeedOperator_Hip   *impl;
1481 
1482   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1483   CeedCallBackend(CeedOperatorGetData(op, &impl));
1484 
1485   // Assemble QFunction
1486   CeedCallBackend(CeedOperatorLinearAssembleQFunctionBuildOrUpdate(op, &assembled_qf, &assembled_rstr, CEED_REQUEST_IMMEDIATE));
1487   CeedCallBackend(CeedElemRestrictionDestroy(&assembled_rstr));
1488   CeedCallBackend(CeedVectorGetArrayRead(assembled_qf, CEED_MEM_DEVICE, &assembled_qf_array));
1489 
1490   CeedCallBackend(CeedVectorGetLength(values, &values_length));
1491   CeedCallBackend(CeedVectorGetLength(assembled_qf, &assembled_qf_length));
1492   if ((values_length > INT_MAX) || (assembled_qf_length > INT_MAX)) use_ceedsize_idx = 1;
1493 
1494   // Setup
1495   if (!impl->asmb) CeedCallBackend(CeedSingleOperatorAssembleSetup_Hip(op, use_ceedsize_idx));
1496   CeedOperatorAssemble_Hip *asmb = impl->asmb;
1497 
1498   assert(asmb != NULL);
1499 
1500   // Assemble element operator
1501   CeedCallBackend(CeedVectorGetArray(values, CEED_MEM_DEVICE, &values_array));
1502   values_array += offset;
1503 
1504   CeedCallBackend(CeedOperatorGetActiveElemRestrictions(op, &rstr_in, &rstr_out));
1505   CeedCallBackend(CeedElemRestrictionGetNumElements(rstr_in, &num_elem_in));
1506   CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_in, &elem_size_in));
1507 
1508   CeedCallBackend(CeedElemRestrictionGetType(rstr_in, &rstr_type_in));
1509   if (rstr_type_in == CEED_RESTRICTION_ORIENTED) {
1510     CeedCallBackend(CeedElemRestrictionGetOrientations(rstr_in, CEED_MEM_DEVICE, &orients_in));
1511   } else if (rstr_type_in == CEED_RESTRICTION_CURL_ORIENTED) {
1512     CeedCallBackend(CeedElemRestrictionGetCurlOrientations(rstr_in, CEED_MEM_DEVICE, &curl_orients_in));
1513   }
1514 
1515   if (rstr_in != rstr_out) {
1516     CeedCallBackend(CeedElemRestrictionGetNumElements(rstr_out, &num_elem_out));
1517     CeedCheck(num_elem_in == num_elem_out, ceed, CEED_ERROR_UNSUPPORTED,
1518               "Active input and output operator restrictions must have the same number of elements");
1519     CeedCallBackend(CeedElemRestrictionGetElementSize(rstr_out, &elem_size_out));
1520 
1521     CeedCallBackend(CeedElemRestrictionGetType(rstr_out, &rstr_type_out));
1522     if (rstr_type_out == CEED_RESTRICTION_ORIENTED) {
1523       CeedCallBackend(CeedElemRestrictionGetOrientations(rstr_out, CEED_MEM_DEVICE, &orients_out));
1524     } else if (rstr_type_out == CEED_RESTRICTION_CURL_ORIENTED) {
1525       CeedCallBackend(CeedElemRestrictionGetCurlOrientations(rstr_out, CEED_MEM_DEVICE, &curl_orients_out));
1526     }
1527   } else {
1528     elem_size_out    = elem_size_in;
1529     orients_out      = orients_in;
1530     curl_orients_out = curl_orients_in;
1531   }
1532 
1533   // Compute B^T D B
1534   CeedInt shared_mem =
1535       ((curl_orients_in || curl_orients_out ? elem_size_in * elem_size_out : 0) + (curl_orients_in ? elem_size_in * asmb->block_size_y : 0)) *
1536       sizeof(CeedScalar);
1537   CeedInt grid   = CeedDivUpInt(num_elem_in, asmb->elems_per_block);
1538   void   *args[] = {(void *)&num_elem_in, &asmb->d_B_in,     &asmb->d_B_out,      &orients_in,  &curl_orients_in,
1539                     &orients_out,         &curl_orients_out, &assembled_qf_array, &values_array};
1540 
1541   CeedCallBackend(
1542       CeedRunKernelDimShared_Hip(ceed, asmb->LinearAssemble, grid, asmb->block_size_x, asmb->block_size_y, asmb->elems_per_block, shared_mem, args));
1543 
1544   // Restore arrays
1545   CeedCallBackend(CeedVectorRestoreArray(values, &values_array));
1546   CeedCallBackend(CeedVectorRestoreArrayRead(assembled_qf, &assembled_qf_array));
1547 
1548   // Cleanup
1549   CeedCallBackend(CeedVectorDestroy(&assembled_qf));
1550   if (rstr_type_in == CEED_RESTRICTION_ORIENTED) {
1551     CeedCallBackend(CeedElemRestrictionRestoreOrientations(rstr_in, &orients_in));
1552   } else if (rstr_type_in == CEED_RESTRICTION_CURL_ORIENTED) {
1553     CeedCallBackend(CeedElemRestrictionRestoreCurlOrientations(rstr_in, &curl_orients_in));
1554   }
1555   if (rstr_in != rstr_out) {
1556     if (rstr_type_out == CEED_RESTRICTION_ORIENTED) {
1557       CeedCallBackend(CeedElemRestrictionRestoreOrientations(rstr_out, &orients_out));
1558     } else if (rstr_type_out == CEED_RESTRICTION_CURL_ORIENTED) {
1559       CeedCallBackend(CeedElemRestrictionRestoreCurlOrientations(rstr_out, &curl_orients_out));
1560     }
1561   }
1562   return CEED_ERROR_SUCCESS;
1563 }
1564 
1565 //------------------------------------------------------------------------------
1566 // Assemble Linear QFunction AtPoints
1567 //------------------------------------------------------------------------------
1568 static int CeedOperatorLinearAssembleQFunctionAtPoints_Hip(CeedOperator op, CeedVector *assembled, CeedElemRestriction *rstr, CeedRequest *request) {
1569   return CeedError(CeedOperatorReturnCeed(op), CEED_ERROR_BACKEND, "Backend does not implement CeedOperatorLinearAssembleQFunction");
1570 }
1571 
1572 //------------------------------------------------------------------------------
1573 // Assemble Linear Diagonal AtPoints
1574 //------------------------------------------------------------------------------
1575 static int CeedOperatorLinearAssembleAddDiagonalAtPoints_Hip(CeedOperator op, CeedVector assembled, CeedRequest *request) {
1576   CeedInt             max_num_points, num_elem, num_input_fields, num_output_fields;
1577   CeedScalar         *e_data[2 * CEED_FIELD_MAX] = {NULL};
1578   CeedQFunctionField *qf_input_fields, *qf_output_fields;
1579   CeedQFunction       qf;
1580   CeedOperatorField  *op_input_fields, *op_output_fields;
1581   CeedOperator_Hip   *impl;
1582 
1583   CeedCallBackend(CeedOperatorGetData(op, &impl));
1584   CeedCallBackend(CeedOperatorGetQFunction(op, &qf));
1585   CeedCallBackend(CeedOperatorGetNumElements(op, &num_elem));
1586   CeedCallBackend(CeedOperatorGetFields(op, &num_input_fields, &op_input_fields, &num_output_fields, &op_output_fields));
1587   CeedCallBackend(CeedQFunctionGetFields(qf, NULL, &qf_input_fields, NULL, &qf_output_fields));
1588   CeedInt num_points[num_elem];
1589 
1590   // Setup
1591   CeedCallBackend(CeedOperatorSetupAtPoints_Hip(op));
1592   max_num_points = impl->max_num_points;
1593   for (CeedInt i = 0; i < num_elem; i++) num_points[i] = max_num_points;
1594 
1595   // Input Evecs and Restriction
1596   CeedCallBackend(CeedOperatorSetupInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, NULL, true, e_data, impl, request));
1597 
1598   // Get point coordinates
1599   if (!impl->point_coords_elem) {
1600     CeedVector          point_coords = NULL;
1601     CeedElemRestriction rstr_points  = NULL;
1602 
1603     CeedCallBackend(CeedOperatorAtPointsGetPoints(op, &rstr_points, &point_coords));
1604     CeedCallBackend(CeedElemRestrictionCreateVector(rstr_points, NULL, &impl->point_coords_elem));
1605     CeedCallBackend(CeedElemRestrictionApply(rstr_points, CEED_NOTRANSPOSE, point_coords, impl->point_coords_elem, request));
1606   }
1607 
1608   // Clear active input Qvecs
1609   for (CeedInt i = 0; i < num_input_fields; i++) {
1610     CeedVector vec;
1611 
1612     CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
1613     if (vec != CEED_VECTOR_ACTIVE) continue;
1614     CeedCallBackend(CeedVectorSetValue(impl->q_vecs_in[i], 0.0));
1615   }
1616 
1617   // Input basis apply if needed
1618   CeedCallBackend(CeedOperatorInputBasisAtPoints_Hip(num_elem, num_points, qf_input_fields, op_input_fields, num_input_fields, true, e_data, impl));
1619 
1620   // Output pointers, as necessary
1621   for (CeedInt i = 0; i < num_output_fields; i++) {
1622     CeedEvalMode eval_mode;
1623 
1624     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
1625     if (eval_mode == CEED_EVAL_NONE) {
1626       // Set the output Q-Vector to use the E-Vector data directly.
1627       CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs[i + impl->num_inputs], CEED_MEM_DEVICE, &e_data[i + num_input_fields]));
1628       CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_data[i + num_input_fields]));
1629     }
1630   }
1631 
1632   // Loop over active fields
1633   for (CeedInt i = 0; i < num_input_fields; i++) {
1634     bool                is_active_at_points = true;
1635     CeedInt             elem_size = 1, num_comp_active = 1, e_vec_size = 0;
1636     CeedRestrictionType rstr_type;
1637     CeedVector          vec;
1638     CeedElemRestriction elem_rstr;
1639 
1640     CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
1641     // -- Skip non-active input
1642     if (vec != CEED_VECTOR_ACTIVE) continue;
1643 
1644     // -- Get active restriction type
1645     CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_input_fields[i], &elem_rstr));
1646     CeedCallBackend(CeedElemRestrictionGetType(elem_rstr, &rstr_type));
1647     is_active_at_points = rstr_type == CEED_RESTRICTION_POINTS;
1648     if (!is_active_at_points) CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
1649     else elem_size = max_num_points;
1650     CeedCallBackend(CeedElemRestrictionGetNumComponents(elem_rstr, &num_comp_active));
1651 
1652     e_vec_size = elem_size * num_comp_active;
1653     for (CeedInt s = 0; s < e_vec_size; s++) {
1654       bool         is_active_input = false;
1655       CeedEvalMode eval_mode;
1656       CeedVector   vec;
1657       CeedBasis    basis;
1658 
1659       CeedCallBackend(CeedOperatorFieldGetVector(op_input_fields[i], &vec));
1660       // Skip non-active input
1661       is_active_input = vec == CEED_VECTOR_ACTIVE;
1662       if (!is_active_input) continue;
1663 
1664       // Update unit vector
1665       if (s == 0) CeedCallBackend(CeedVectorSetValue(impl->e_vecs[i], 0.0));
1666       else CeedCallBackend(CeedVectorSetValueStrided(impl->e_vecs[i], s - 1, e_vec_size, 0.0));
1667       CeedCallBackend(CeedVectorSetValueStrided(impl->e_vecs[i], s, e_vec_size, 1.0));
1668 
1669       // Basis action
1670       CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_input_fields[i], &eval_mode));
1671       switch (eval_mode) {
1672         case CEED_EVAL_NONE:
1673           CeedCallBackend(CeedVectorSetArray(impl->q_vecs_in[i], CEED_MEM_DEVICE, CEED_USE_POINTER, e_data[i]));
1674           break;
1675         case CEED_EVAL_INTERP:
1676         case CEED_EVAL_GRAD:
1677         case CEED_EVAL_DIV:
1678         case CEED_EVAL_CURL:
1679           CeedCallBackend(CeedOperatorFieldGetBasis(op_input_fields[i], &basis));
1680           CeedCallBackend(CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_NOTRANSPOSE, eval_mode, impl->point_coords_elem, impl->e_vecs[i],
1681                                                  impl->q_vecs_in[i]));
1682           break;
1683         case CEED_EVAL_WEIGHT:
1684           break;  // No action
1685       }
1686 
1687       // Q function
1688       CeedCallBackend(CeedQFunctionApply(qf, num_elem * max_num_points, impl->q_vecs_in, impl->q_vecs_out));
1689 
1690       // Output basis apply if needed
1691       for (CeedInt j = 0; j < num_output_fields; j++) {
1692         bool                is_active_output = false;
1693         CeedInt             elem_size        = 0;
1694         CeedRestrictionType rstr_type;
1695         CeedEvalMode        eval_mode;
1696         CeedVector          vec;
1697         CeedElemRestriction elem_rstr;
1698         CeedBasis           basis;
1699 
1700         CeedCallBackend(CeedOperatorFieldGetVector(op_output_fields[j], &vec));
1701         // ---- Skip non-active output
1702         is_active_output = vec == CEED_VECTOR_ACTIVE;
1703         if (!is_active_output) continue;
1704 
1705         // ---- Check if elem size matches
1706         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[j], &elem_rstr));
1707         CeedCallBackend(CeedElemRestrictionGetType(elem_rstr, &rstr_type));
1708         if (is_active_at_points && rstr_type != CEED_RESTRICTION_POINTS) continue;
1709         if (rstr_type == CEED_RESTRICTION_POINTS) {
1710           CeedCallBackend(CeedElemRestrictionGetMaxPointsInElement(elem_rstr, &elem_size));
1711         } else {
1712           CeedCallBackend(CeedElemRestrictionGetElementSize(elem_rstr, &elem_size));
1713         }
1714         {
1715           CeedInt num_comp = 0;
1716 
1717           CeedCallBackend(CeedElemRestrictionGetNumComponents(elem_rstr, &num_comp));
1718           if (e_vec_size != num_comp * elem_size) continue;
1719         }
1720 
1721         // Basis action
1722         CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[j], &eval_mode));
1723         switch (eval_mode) {
1724           case CEED_EVAL_NONE:
1725             CeedCallBackend(CeedVectorRestoreArray(impl->e_vecs[j + impl->num_inputs], &e_data[j + num_input_fields]));
1726             break;
1727           case CEED_EVAL_INTERP:
1728           case CEED_EVAL_GRAD:
1729           case CEED_EVAL_DIV:
1730           case CEED_EVAL_CURL:
1731             CeedCallBackend(CeedOperatorFieldGetBasis(op_output_fields[j], &basis));
1732             CeedCallBackend(CeedBasisApplyAtPoints(basis, num_elem, num_points, CEED_TRANSPOSE, eval_mode, impl->point_coords_elem,
1733                                                    impl->q_vecs_out[j], impl->e_vecs[j + impl->num_inputs]));
1734             break;
1735           // LCOV_EXCL_START
1736           case CEED_EVAL_WEIGHT: {
1737             return CeedError(CeedOperatorReturnCeed(op), CEED_ERROR_BACKEND, "CEED_EVAL_WEIGHT cannot be an output evaluation mode");
1738             // LCOV_EXCL_STOP
1739           }
1740         }
1741 
1742         // Mask output e-vec
1743         CeedCallBackend(CeedVectorPointwiseMult(impl->e_vecs[j + impl->num_inputs], impl->e_vecs[i], impl->e_vecs[j + impl->num_inputs]));
1744 
1745         // Restrict
1746         CeedCallBackend(CeedOperatorFieldGetElemRestriction(op_output_fields[j], &elem_rstr));
1747         CeedCallBackend(CeedElemRestrictionApply(elem_rstr, CEED_TRANSPOSE, impl->e_vecs[j + impl->num_inputs], assembled, request));
1748 
1749         // Reset q_vec for
1750         if (eval_mode == CEED_EVAL_NONE) {
1751           CeedCallBackend(CeedVectorGetArrayWrite(impl->e_vecs[j + impl->num_inputs], CEED_MEM_DEVICE, &e_data[j + num_input_fields]));
1752           CeedCallBackend(CeedVectorSetArray(impl->q_vecs_out[j], CEED_MEM_DEVICE, CEED_USE_POINTER, e_data[j + num_input_fields]));
1753         }
1754       }
1755 
1756       // Reset vec
1757       if (s == e_vec_size - 1 && i != num_input_fields - 1) CeedCallBackend(CeedVectorSetValue(impl->q_vecs_in[i], 0.0));
1758     }
1759   }
1760 
1761   // Restore CEED_EVAL_NONE
1762   for (CeedInt i = 0; i < num_output_fields; i++) {
1763     CeedEvalMode eval_mode;
1764 
1765     // Get eval_mode
1766     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
1767 
1768     // Restore evec
1769     CeedCallBackend(CeedQFunctionFieldGetEvalMode(qf_output_fields[i], &eval_mode));
1770     if (eval_mode == CEED_EVAL_NONE) {
1771       CeedCallBackend(CeedVectorRestoreArray(impl->e_vecs[i + impl->num_inputs], &e_data[i + num_input_fields]));
1772     }
1773   }
1774 
1775   // Restore input arrays
1776   CeedCallBackend(CeedOperatorRestoreInputs_Hip(num_input_fields, qf_input_fields, op_input_fields, true, e_data, impl));
1777   return CEED_ERROR_SUCCESS;
1778 }
1779 
1780 //------------------------------------------------------------------------------
1781 // Create operator
1782 //------------------------------------------------------------------------------
1783 int CeedOperatorCreate_Hip(CeedOperator op) {
1784   Ceed              ceed;
1785   CeedOperator_Hip *impl;
1786 
1787   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1788   CeedCallBackend(CeedCalloc(1, &impl));
1789   CeedCallBackend(CeedOperatorSetData(op, impl));
1790   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunction", CeedOperatorLinearAssembleQFunction_Hip));
1791   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunctionUpdate", CeedOperatorLinearAssembleQFunctionUpdate_Hip));
1792   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleAddDiagonal", CeedOperatorLinearAssembleAddDiagonal_Hip));
1793   CeedCallBackend(
1794       CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleAddPointBlockDiagonal", CeedOperatorLinearAssembleAddPointBlockDiagonal_Hip));
1795   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleSingle", CeedSingleOperatorAssemble_Hip));
1796   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "ApplyAdd", CeedOperatorApplyAdd_Hip));
1797   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "Destroy", CeedOperatorDestroy_Hip));
1798   return CEED_ERROR_SUCCESS;
1799 }
1800 
1801 //------------------------------------------------------------------------------
1802 // Create operator AtPoints
1803 //------------------------------------------------------------------------------
1804 int CeedOperatorCreateAtPoints_Hip(CeedOperator op) {
1805   Ceed              ceed;
1806   CeedOperator_Hip *impl;
1807 
1808   CeedCallBackend(CeedOperatorGetCeed(op, &ceed));
1809   CeedCallBackend(CeedCalloc(1, &impl));
1810   CeedCallBackend(CeedOperatorSetData(op, impl));
1811 
1812   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleQFunction", CeedOperatorLinearAssembleQFunctionAtPoints_Hip));
1813   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "LinearAssembleAddDiagonal", CeedOperatorLinearAssembleAddDiagonalAtPoints_Hip));
1814   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "ApplyAdd", CeedOperatorApplyAddAtPoints_Hip));
1815   CeedCallBackend(CeedSetBackendFunction(ceed, "Operator", op, "Destroy", CeedOperatorDestroy_Hip));
1816   return CEED_ERROR_SUCCESS;
1817 }
1818 
1819 //------------------------------------------------------------------------------
1820