device_projection.F90

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module device_projection
  use num_types, only : rp, c_rp
  use utils, only : neko_error
  use, intrinsic :: iso_c_binding
  implicit none
  private
 
  public :: device_proj_on, device_project_ortho
  
#ifdef HAVE_HIP
  interface
     subroutine hip_project_on(a_d, b_d, x_d_d, b_d_d, mult_d, x_d, j, n) &
          bind(c, name = 'hip_project_on')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, x_d_d, b_d_d, mult_d, x_d
       integer(c_int) :: j, n
     end subroutine hip_project_on
  end interface
 
  interface
     subroutine hip_project_ortho(a_d, b_d, x_d_d, b_d_d, &
                                   w_d, xm_d, j, n, nrm) &
          bind(c, name = 'hip_project_ortho')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, x_d_d, b_d_d, w_d
       type(c_ptr), value :: xm_d
       integer(c_int) :: j, n
       real(c_rp) :: nrm
     end subroutine hip_project_ortho
  end interface
#elif HAVE_CUDA
  interface
     subroutine cuda_project_on(a_d, b_d, x_d_d, b_d_d, mult_d, x_d, j, n) &
          bind(c, name = 'cuda_project_on')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, x_d_d, b_d_d, mult_d, x_d
       integer(c_int) :: j, n
     end subroutine cuda_project_on
  end interface
 
  interface
     subroutine cuda_project_ortho(a_d, b_d, x_d_d, b_d_d, &
                                   w_d, xm_d, j, n, nrm) &
          bind(c, name = 'cuda_project_ortho')
       use, intrinsic :: iso_c_binding
       import c_rp
       implicit none
       type(c_ptr), value :: a_d, b_d, x_d_d, b_d_d, w_d
       type(c_ptr), value :: xm_d
       integer(c_int) :: j, n
       real(c_rp) :: nrm
     end subroutine cuda_project_ortho
  end interface
#endif
 
contains
 
  subroutine device_proj_on(alpha_d, b_d, x_d_d, b_d_d, mult_d, xbar_d, j, n)
    type(c_ptr), value :: alpha_d, b_d, x_d_d, b_d_d, mult_d, xbar_d
    integer(c_int) :: j, n
    integer :: ierr
#ifdef HAVE_HIP
    call hip_project_on(alpha_d, b_d, x_d_d, b_d_d, mult_d, xbar_d, j, n)
#elif HAVE_CUDA
    call cuda_project_on(alpha_d, b_d, x_d_d, b_d_d, mult_d, xbar_d, j, n)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_proj_on
 
  subroutine device_project_ortho(alpha_d, b_d, x_d_d, b_d_d, &
                                  w_d, xm_d, j, n, nrm)
    type(c_ptr), value :: alpha_d, b_d, x_d_d, b_d_d
    type(c_ptr), value :: w_d,  xm_d
    integer(c_int) :: j, n
    real(c_rp) :: nrm
    integer :: ierr
#ifdef HAVE_HIP
    call hip_project_ortho(alpha_d, b_d, x_d_d, b_d_d, w_d, xm_d, j, n, nrm)
#elif HAVE_CUDA
    call cuda_project_ortho(alpha_d, b_d, x_d_d, b_d_d, w_d, xm_d, j, n, nrm)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine device_project_ortho
 
end module device_projection