device_tree_amg_smoother.F90

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module device_tree_amg_smoother
  use num_types, only : rp, c_rp
  use, intrinsic :: iso_c_binding, only : c_ptr, c_int, c_bool
  use device, only : glb_cmd_queue
  use utils, only : neko_error
  implicit none
  private
 
#ifdef HAVE_HIP
  interface
     subroutine hip_amg_cheby_solve_part1(r_d, f_d, w_d, x_d, d_d, &
          inv_thet, n, zero_initial, strm) &
          bind(c, name='hip_amg_cheby_solve_part1')
       use, intrinsic :: iso_c_binding, only : c_ptr, c_int, c_bool
       import c_rp
       type(c_ptr), value :: r_d, f_d, w_d, x_d, d_d, strm
       real(c_rp) :: inv_thet
       logical(c_bool) :: zero_initial
     end subroutine hip_amg_cheby_solve_part1
  end interface
 
  interface
     subroutine hip_amg_cheby_solve_part2(r_d, w_d, d_d, x_d, &
          tmp1, tmp2, n, strm) bind(c, name='hip_amg_cheby_solve_part2')
       use, intrinsic :: iso_c_binding, only : c_ptr, c_int
       import c_rp
       type(c_ptr), value :: r_d, w_d, d_d, x_d, strm
       real(c_rp) :: tmp1, tmp2
       integer(c_int) :: n
     end subroutine hip_amg_cheby_solve_part2
  end interface
#elif HAVE_CUDA
  interface
     subroutine cuda_amg_cheby_solve_part1(r_d, f_d, w_d, x_d, d_d, &
          inv_thet, n, zero_initial, strm) &
          bind(c, name='cuda_amg_cheby_solve_part1')
       use, intrinsic :: iso_c_binding, only : c_ptr, c_int, c_bool
       import c_rp
       type(c_ptr), value :: r_d, f_d, w_d, x_d, d_d, strm
       real(c_rp) :: inv_thet
       logical(c_bool) :: zero_initial
     end subroutine cuda_amg_cheby_solve_part1
  end interface
 
  interface
     subroutine cuda_amg_cheby_solve_part2(r_d, w_d, d_d, x_d, &
          tmp1, tmp2, n, strm) bind(c, name='cuda_amg_cheby_solve_part2')
       use, intrinsic :: iso_c_binding, only : c_ptr, c_int
       import c_rp
       type(c_ptr), value :: r_d, w_d, d_d, x_d, strm
       real(c_rp) :: tmp1, tmp2
       integer(c_int) :: n
     end subroutine cuda_amg_cheby_solve_part2
  end interface
#elif HAVE_OPENCL
#endif
 
  public :: amg_device_cheby_solve_part1, amg_device_cheby_solve_part2
 
contains
 
  subroutine amg_device_cheby_solve_part1(r_d, f_d, w_d, x_d, d_d, &
       inv_thet, n, zero_initial)
    type(c_ptr), intent(inout) :: r_d, f_d, w_d, d_d, x_d
    real(kind=rp), intent(in) :: inv_thet
    integer, intent(in) :: n
    logical, intent(in) :: zero_initial
    logical(c_bool) :: zinit
 
    zinit = zero_initial
 
#ifdef HAVE_HIP
    call hip_amg_cheby_solve_part1(r_d, f_d, w_d, x_d, d_d, &
         inv_thet, n, zinit, glb_cmd_queue)
#elif HAVE_CUDA
    call cuda_amg_cheby_solve_part1(r_d, f_d, w_d, x_d, d_d, &
         inv_thet, n, zinit, glb_cmd_queue)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine amg_device_cheby_solve_part1
 
  subroutine amg_device_cheby_solve_part2(r_d, w_d, d_d, x_d, tmp1, tmp2, n)
    type(c_ptr), intent(inout) :: r_d, w_d, d_d, x_d
    real(kind=rp), intent(in) :: tmp1, tmp2
    integer, intent(in) :: n
#ifdef HAVE_HIP
    call hip_amg_cheby_solve_part2(r_d, w_d, d_d, x_d, &
         tmp1, tmp2, n, glb_cmd_queue)
#elif HAVE_CUDA
    call cuda_amg_cheby_solve_part2(r_d, w_d, d_d, x_d, &
         tmp1, tmp2, n, glb_cmd_queue)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine amg_device_cheby_solve_part2
 
end module device_tree_amg_smoother