adv_no_dealias.f90

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module adv_no_dealias
  use advection, only: advection_t
  use num_types, only: rp
  use math, only: subcol3, rzero
  use space, only: space_t
  use field, only: field_t
  use coefs, only: coef_t
  use device_math, only: device_subcol3, device_rzero
  use neko_config, only: neko_bcknd_device
  use operators, only: conv1
  use device, only: device_free, device_map, device_get_ptr
  use, intrinsic :: iso_c_binding, only: c_ptr, c_null_ptr, c_associated
  implicit none
  private
 
  type, public, extends(advection_t) :: adv_no_dealias_t
     real(kind=rp), allocatable :: temp(:)
     type(c_ptr) :: temp_d = c_null_ptr
   contains
     procedure, pass(this) :: init => init_no_dealias
     procedure, pass(this) :: free => free_no_dealias
     procedure, pass(this) :: compute => compute_advection_no_dealias
     procedure, pass(this) :: compute_scalar => &
       compute_scalar_advection_no_dealias
  end type adv_no_dealias_t
 
contains
 
  subroutine init_no_dealias(this, coef)
    class(adv_no_dealias_t), intent(inout) :: this
    type(coef_t), intent(in) :: coef
 
    allocate(this%temp(coef%dof%size()))
 
    if (neko_bcknd_device .eq. 1) then
       call device_map(this%temp, this%temp_d, coef%dof%size())
    end if
 
  end subroutine init_no_dealias
 
  subroutine free_no_dealias(this)
    class(adv_no_dealias_t), intent(inout) :: this
 
    if (allocated(this%temp)) then
       deallocate(this%temp)
    end if
    if (c_associated(this%temp_d)) then
       call device_free(this%temp_d)
    end if
  end subroutine free_no_dealias
 
  subroutine compute_advection_no_dealias(this, vx, vy, vz, fx, fy, fz, Xh, &
                                          coef, n, dt)
    class(adv_no_dealias_t), intent(inout) :: this
    type(space_t), intent(inout) :: Xh
    type(coef_t), intent(inout) :: coef
    type(field_t), intent(inout) :: vx, vy, vz
    type(field_t), intent(inout) :: fx, fy, fz
    integer, intent(in) :: n
    real(kind=rp), intent(in), optional :: dt
 
    if (neko_bcknd_device .eq. 1) then
 
       call conv1(this%temp, vx%x, vx%x, vy%x, vz%x, xh, coef)
       call device_subcol3 (fx%x_d, coef%B_d, this%temp_d, n)
       call conv1(this%temp, vy%x, vx%x, vy%x, vz%x, xh, coef)
       call device_subcol3 (fy%x_d, coef%B_d, this%temp_d, n)
       if (coef%Xh%lz .eq. 1) then
          call device_rzero (this%temp_d, n)
       else
          call conv1(this%temp, vz%x, vx%x, vy%x, vz%x, xh, coef)
          call device_subcol3(fz%x_d, coef%B_d, this%temp_d, n)
       end if
    else
       call conv1(this%temp, vx%x, vx%x, vy%x, vz%x, xh, coef)
       call subcol3 (fx%x, coef%B, this%temp, n)
       call conv1(this%temp, vy%x, vx%x, vy%x, vz%x, xh, coef)
       call subcol3 (fy%x, coef%B, this%temp, n)
       if (coef%Xh%lz .eq. 1) then
          call rzero (this%temp, n)
       else
          call conv1(this%temp, vz%x, vx%x, vy%x, vz%x, xh, coef)
          call subcol3(fz%x, coef%B, this%temp, n)
       end if
    end if
 
  end subroutine compute_advection_no_dealias
 
  subroutine compute_scalar_advection_no_dealias(this, vx, vy, vz, s, fs, Xh, &
                                                 coef, n, dt)
    class(adv_no_dealias_t), intent(inout) :: this
    type(field_t), intent(inout) :: vx, vy, vz
    type(field_t), intent(inout) :: s
    type(field_t), intent(inout) :: fs
    type(space_t), intent(inout) :: Xh
    type(coef_t), intent(inout) :: coef
    integer, intent(in) :: n
    real(kind=rp), intent(in), optional :: dt
 
    if (neko_bcknd_device .eq. 1) then
 
       call conv1(this%temp, s%x, vx%x, vy%x, vz%x, xh, coef)
       call device_subcol3 (fs%x_d, coef%B_d, this%temp_d, n)
       if (coef%Xh%lz .eq. 1) then
          call device_rzero (this%temp_d, n)
       end if
    else
       ! temp will hold vx*ds/dx + vy*ds/dy + vz*ds/sz
       call conv1(this%temp, s%x, vx%x, vy%x, vz%x, xh, coef)
 
       ! fs = fs - B*temp
       call subcol3 (fs%x, coef%B, this%temp, n)
       if (coef%Xh%lz .eq. 1) then
          call rzero (this%temp, n)
       end if
    end if
 
  end subroutine compute_scalar_advection_no_dealias
 
end module adv_no_dealias