scalar_residual_device.F90

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module scalar_residual_device
  use scalar_residual, only : scalar_residual_t
  use device_math, only : device_copy, device_cfill
  use ax_product, only : ax_t
  use field, only : field_t
  use coefs, only : coef_t
  use space, only : space_t
  use mesh, only : mesh_t
  use num_types, only : rp    
  use, intrinsic :: iso_c_binding
  implicit none
  private
 
  type, public, extends(scalar_residual_t) :: scalar_residual_device_t
   contains
     procedure, nopass :: compute => scalar_residual_device_compute
  end type scalar_residual_device_t
 
#ifdef HAVE_HIP
  interface
     subroutine scalar_residual_update_hip(s_res_d, f_s_d, n) &
          bind(c, name = 'scalar_residual_update_hip')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: s_res_d
       type(c_ptr), value :: f_s_d
       integer(c_int) :: n
     end subroutine scalar_residual_update_hip
  end interface
#elif HAVE_CUDA
 
  interface
     subroutine scalar_residual_update_cuda(s_res_d, f_s_d, n) &
          bind(c, name = 'scalar_residual_update_cuda')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: s_res_d
       type(c_ptr), value :: f_s_d
       integer(c_int) :: n
     end subroutine scalar_residual_update_cuda
  end interface
#elif HAVE_OPENCL
 
  interface
     subroutine scalar_residual_update_opencl(s_res_d, f_s_d, n) &
          bind(c, name = 'scalar_residual_update_opencl')
       use, intrinsic :: iso_c_binding
       implicit none
       type(c_ptr), value :: s_res_d
       type(c_ptr), value :: f_s_d
       integer(c_int) :: n
     end subroutine scalar_residual_update_opencl
  end interface
#endif
 
 
contains
 
 
  subroutine scalar_residual_device_compute(Ax, s, s_res, f_Xh, c_Xh, msh, Xh, &
             lambda, rhocp, bd, dt, n)
    class(ax_t), intent(in) :: Ax
    type(mesh_t), intent(inout) :: msh
    type(space_t), intent(inout) :: Xh
    type(field_t), intent(inout) :: s
    type(field_t), intent(inout) :: s_res
    type(field_t), intent(inout) :: f_Xh
    type(coef_t), intent(inout) :: c_Xh
    type(field_t), intent(in) :: lambda
    real(kind=rp), intent(in) :: rhocp
    real(kind=rp), intent(in) :: bd
    real(kind=rp), intent(in) :: dt
    integer, intent(in) :: n
 
    call device_copy(c_xh%h1_d, lambda%x_d, n)
    call device_cfill(c_xh%h2_d, rhocp * (bd / dt), n)
    c_xh%ifh2 = .true.
 
    call ax%compute(s_res%x, s%x, c_xh, msh, xh)
 
#ifdef HAVE_HIP
    call scalar_residual_update_hip(s_res%x_d, f_xh%x_d, n)
#elif HAVE_CUDA
    call scalar_residual_update_cuda(s_res%x_d, f_xh%x_d, n)
#elif HAVE_OPENCL
    call scalar_residual_update_opencl(s_res%x_d, f_xh%x_d, n)
#endif
 
  end subroutine scalar_residual_device_compute
 
end module scalar_residual_device