xref: /libCEED/include/ceed/jit-source/gallery/ceed-identity.h (revision 509d4af65d23546c690c9766d8b29e47dc3b3afb)
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 /**
9   @brief  Identity QFunction that copies inputs directly into outputs
10 **/
11 
12 #include <ceed.h>
13 
14 typedef struct {
15   CeedInt size;
16 } IdentityCtx;
17 
18 CEED_QFUNCTION(Identity)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
19   // Ctx holds field size
20   IdentityCtx   identity_ctx = *(IdentityCtx *)ctx;
21   const CeedInt size         = identity_ctx.size;
22 
23   // in[0] is input, size (Q*size)
24   const CeedScalar *input = in[0];
25   // out[0] is output, size (Q*size)
26   CeedScalar *output = out[0];
27 
28   // Quadrature point loop
29   CeedPragmaSIMD for (CeedInt i = 0; i < Q * size; i++) { output[i] = input[i]; }  // End of Quadrature Point Loop
30 
31   return CEED_ERROR_SUCCESS;
32 }
33