fdm_device.F90

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module fdm_device
  use num_types, only : rp
  use utils, only : neko_error
  use device, only : device_get_ptr, glb_cmd_queue
  use, intrinsic :: iso_c_binding, only : c_ptr, c_int
  implicit none
  private
 
#ifdef HAVE_HIP
  interface
     subroutine hip_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream) &
          bind(c, name='hip_fdm_do_fast')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: e_d, r_d, s_d, d_d, stream
       integer(c_int) :: nl, nelv
     end subroutine hip_fdm_do_fast
  end interface
#elif HAVE_CUDA
  interface
     subroutine cuda_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream) &
          bind(c, name='cuda_fdm_do_fast')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: e_d, r_d, s_d, d_d, stream
       integer(c_int) :: nl, nelv
     end subroutine cuda_fdm_do_fast
  end interface
#elif HAVE_OPENCL
  interface
     subroutine opencl_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream) &
          bind(c, name='opencl_fdm_do_fast')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: e_d, r_d, s_d, d_d, stream
       integer(c_int) :: nl, nelv
     end subroutine opencl_fdm_do_fast
  end interface
#elif HAVE_METAL
  interface
     subroutine metal_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream) &
          bind(c, name='metal_fdm_do_fast')
       use, intrinsic :: iso_c_binding
       type(c_ptr), value :: e_d, r_d, s_d, d_d, stream
       integer(c_int) :: nl, nelv
     end subroutine metal_fdm_do_fast
  end interface
#endif
 
  public :: fdm_do_fast_device
 
contains
 
  subroutine fdm_do_fast_device(e, r, s, d, nl, ldim, nelv, stream)
    integer, intent(in) :: nl, nelv, ldim
    real(kind=rp), intent(inout) :: e(nl**ldim, nelv)
    real(kind=rp), intent(inout) :: r(nl**ldim, nelv)
    real(kind=rp), intent(inout) :: s(nl*nl,2,ldim, nelv)
    real(kind=rp), intent(inout) :: d(nl**ldim, nelv)
    type(c_ptr) :: e_d, r_d, s_d, d_d
    type(c_ptr), optional :: stream
 
    e_d = device_get_ptr(e)
    r_d = device_get_ptr(r)
    s_d = device_get_ptr(s)
    d_d = device_get_ptr(d)
    if (.not. present(stream)) stream = glb_cmd_queue
    if (ldim .ne. 3) call neko_error('fdm dim not supported')
 
#ifdef HAVE_HIP
    call hip_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream)
#elif HAVE_CUDA
    call cuda_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream)
#elif HAVE_OPENCL
    call opencl_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream)
#elif HAVE_METAL
    call metal_fdm_do_fast(e_d, r_d, s_d, d_d, nl, nelv, stream)
#else
    call neko_error('No device backend configured')
#endif
  end subroutine fdm_do_fast_device
 
end module fdm_device