// Copyright (c) 2017-2022, Lawrence Livermore National Security, LLC and other CEED contributors.
// All Rights Reserved. See the top-level LICENSE and NOTICE files for details.
//
// SPDX-License-Identifier: BSD-2-Clause
//
// This file is part of CEED:  http://github.com/ceed

/**
  @brief Ceed QFunction for applying the mass matrix on a vector system
           with three components
**/

#ifndef vectormassapply_h
#define vectormassapply_h

CEED_QFUNCTION(Vector3MassApply)(void *ctx, const CeedInt Q,
                                 const CeedScalar *const *in, CeedScalar *const *out) {
  // *INDENT-OFF*
  // in[0] is u, size (Q)
  // in[1] is quadrature data, size (Q)
  const CeedScalar (*u)[CEED_Q_VLA] = (const CeedScalar(*)[CEED_Q_VLA])in[0],
                            *q_data = in[1];
  // out[0] is v, size (Q)
  CeedScalar       (*v)[CEED_Q_VLA] = (CeedScalar(*)[CEED_Q_VLA])out[0];
  // *INDENT-ON*

  const CeedInt num_comp = 3;

  // Quadrature point loop
  CeedPragmaSIMD
  for (CeedInt i=0; i<Q; i++) {
    for (CeedInt c=0; c<num_comp; c++) {
      v[c][i] = u[c][i] * q_data[i];
    }
  } // End of Quadrature Point Loop

  return CEED_ERROR_SUCCESS;
}

#endif // vectormassapply_h