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 /*@@
   @file      GRHydro_PPMReconstruct_drv.F90
   @date      Tue Jul 19 13:22:03 EDT 2011
   @author    Bruno C. Mundim, Joshua Faber
   @desc 
   Driver routine to perform the PPM reconstructions.
   @enddesc 
 @@*/

#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Parameters.h"
#include "cctk_Functions.h"

#include "SpaceMask.h"

#define velx(i,j,k) vel(i,j,k,1)
#define vely(i,j,k) vel(i,j,k,2)
#define velz(i,j,k) vel(i,j,k,3)
#define sx(i,j,k) scon(i,j,k,1)
#define sy(i,j,k) scon(i,j,k,2)
#define sz(i,j,k) scon(i,j,k,3)
#define Bvecx(i,j,k) Bvec(i,j,k,1)
#define Bvecy(i,j,k) Bvec(i,j,k,2)
#define Bvecz(i,j,k) Bvec(i,j,k,3)
#define Bconsx(i,j,k) Bcons(i,j,k,1)
#define Bconsy(i,j,k) Bcons(i,j,k,2)
#define Bconsz(i,j,k) Bcons(i,j,k,3)


 /*@@
   @routine    GRHydro_PPMReconstruct_drv
   @date       Tue Jul 19 13:24:34 EDT 2011
   @author     Luca Baiotti, Ian Hawke, Bruno C. Mundim, Joshua Faber
   @desc 
   A driver routine to do PPM reconstructions. 
   @enddesc 
   @calls     
   @calledby   
   @history 
 
   @endhistory 

@@*/

subroutine GRHydro_PPMReconstruct_drv(CCTK_ARGUMENTS)
  
  implicit none
  
  DECLARE_CCTK_ARGUMENTS
  DECLARE_CCTK_PARAMETERS
  DECLARE_CCTK_FUNCTIONS

  integer :: nx, ny, nz, i, j, k, itracer

  logical, dimension(:,:,:), allocatable :: trivial_rp
!!$  logical, dimension(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)) :: trivial_rp

  CCTK_INT :: type_bitsx, trivialx, not_trivialx, &
       &type_bitsy, trivialy, not_trivialy, &
       &type_bitsz, trivialz, not_trivialz

  CCTK_REAL, dimension(:,:,:),allocatable :: &
       &psi4, lbetax, lbetay, lbetaz, dum, dump, dumm
!!$  CCTK_REAL, dimension(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)) :: &
!!$       &psi4, lbetax, lbetay, lbetaz

  CCTK_INT :: ierr

  CCTK_REAL :: local_min_tracer

  allocate(trivial_rp(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),STAT=ierr)
  if (ierr .ne. 0) then
    call CCTK_WARN(0, "Allocation problems with trivial_rp")
  end if
  
!!$ The dum variables are used as dummies if MHD on but divergence cleaning off
  allocate(psi4(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),&
       lbetax(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),&
       lbetay(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),&
       lbetaz(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),&
       dum(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),&
       dump(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),&
       dumm(cctk_lsh(1),cctk_lsh(2),cctk_lsh(3)),STAT=ierr)

  if (ierr .ne. 0) then
    call CCTK_WARN(0, "Allocation problems with lbeta")
  end if
  
  call SpaceMask_GetTypeBits(type_bitsx, "Hydro_RiemannProblemX")
  call SpaceMask_GetStateBits(trivialx, "Hydro_RiemannProblemX", &
       &"trivial")
  call SpaceMask_GetStateBits(not_trivialx, "Hydro_RiemannProblemX", &
       &"not_trivial")
  call SpaceMask_GetTypeBits(type_bitsy, "Hydro_RiemannProblemY")
  call SpaceMask_GetStateBits(trivialy, "Hydro_RiemannProblemY", &
       &"trivial")
  call SpaceMask_GetStateBits(not_trivialy, "Hydro_RiemannProblemY", &
       &"not_trivial")
  call SpaceMask_GetTypeBits(type_bitsz, "Hydro_RiemannProblemZ")
  call SpaceMask_GetStateBits(trivialz, "Hydro_RiemannProblemZ", &
       &"trivial")
  call SpaceMask_GetStateBits(not_trivialz, "Hydro_RiemannProblemZ", &
       &"not_trivial")

  nx = cctk_lsh(1)
  ny = cctk_lsh(2)
  nz = cctk_lsh(3)

  !$OMP PARALLEL
  !$OMP WORKSHARE
  trivial_rp = .false.
  !$OMP END WORKSHARE NOWAIT

!!$  Currently only option is reconstruction on primitive variables.
!!$  Should change this.

  !$OMP WORKSHARE
  psi4 = 1.d0
  !$OMP END WORKSHARE NOWAIT
  if (shift_state .ne. 0) then
    !$OMP WORKSHARE
    lbetax = betax
    lbetay = betay
    lbetaz = betaz
    !$OMP END WORKSHARE NOWAIT
  else
    !$OMP WORKSHARE
    lbetax = 0.d0
    lbetay = 0.d0
    lbetaz = 0.d0
    !$OMP END WORKSHARE NOWAIT
  end if
  !$OMP END PARALLEL


!!$ PPM starts:
    if (flux_direction == 1) then
       if(evolve_mhd.ne.0) then
          if(clean_divergence.ne.0) then
            !$OMP PARALLEL DO PRIVATE(i, j, k)
            do k = GRHydro_stencil, nz - GRHydro_stencil + 1
              do j = GRHydro_stencil, ny - GRHydro_stencil + 1
                 call SimplePPM_1dM(GRHydro_eos_handle,0,nx,CCTK_DELTA_SPACE(1),&
                      rho(:,j,k),velx(:,j,k),vely(:,j,k),velz(:,j,k),&
                      Bvecx(:,j,k),Bvecy(:,j,k),Bvecz(:,j,k),psidc(:,j,k),eps(:,j,k),press(:,j,k),&
                      rhominus(:,j,k),velxminus(:,j,k),velyminus(:,j,k),velzminus(:,j,k),&
                      Bvecxminus(:,j,k),Bvecyminus(:,j,k),Bveczminus(:,j,k),psidcminus(:,j,k),epsminus(:,j,k),&
                      rhoplus(:,j,k),velxplus(:,j,k),velyplus(:,j,k),velzplus(:,j,k),&
                      Bvecxplus(:,j,k),Bvecyplus(:,j,k),Bveczplus(:,j,k),psidcplus(:,j,k),epsplus(:,j,k),&
                      1,trivial_rp(:,j,k), hydro_excision_mask(:,j,k),&
                      gxx(:,j,k), gxy(:,j,k), gxz(:,j,k), gyy(:,j,k), gyz(:,j,k), &
                      gzz(:,j,k), psi4(:,j,k), lbetax(:,j,k), alp(:,j,k),&
                      w_lorentz(:,j,k), &
                      1, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_x_left, &
                      GRHydro_mppm_eigenvalue_x_right, &
                      GRHydro_mppm_xwind)
                do i = 1, nx
                   if (trivial_rp(i,j,k)) then
                     SpaceMask_SetStateBitsF90(space_mask, i, j, k, type_bitsx, trivialx)
                   else
                     SpaceMask_SetStateBitsF90(space_mask, i, j, k, type_bitsx, not_trivialx)
                   end if
                end do
              end do
            end do
            !$OMP END PARALLEL DO
          else  !clean_divergence
            !$OMP PARALLEL DO PRIVATE(i, j, k)
            do k = GRHydro_stencil, nz - GRHydro_stencil + 1
              do j = GRHydro_stencil, ny - GRHydro_stencil + 1
                 call SimplePPM_1dM(GRHydro_eos_handle,0,nx,CCTK_DELTA_SPACE(1),&
                      rho(:,j,k),velx(:,j,k),vely(:,j,k),velz(:,j,k),&
                      Bvecx(:,j,k),Bvecy(:,j,k),Bvecz(:,j,k),dum(:,j,k),eps(:,j,k),press(:,j,k),&
                      rhominus(:,j,k),velxminus(:,j,k),velyminus(:,j,k),velzminus(:,j,k),&
                      Bvecxminus(:,j,k),Bvecyminus(:,j,k),Bveczminus(:,j,k),dumm(:,j,k),epsminus(:,j,k),&
                      rhoplus(:,j,k),velxplus(:,j,k),velyplus(:,j,k),velzplus(:,j,k),&
                      Bvecxplus(:,j,k),Bvecyplus(:,j,k),Bveczplus(:,j,k),dump(:,j,k),epsplus(:,j,k),&
                      0,trivial_rp(:,j,k), hydro_excision_mask(:,j,k),&
                      gxx(:,j,k), gxy(:,j,k), gxz(:,j,k), gyy(:,j,k), gyz(:,j,k), &
                      gzz(:,j,k), psi4(:,j,k), lbetax(:,j,k), alp(:,j,k),&
                      w_lorentz(:,j,k), &
                      1, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_x_left, &
                      GRHydro_mppm_eigenvalue_x_right, &
                      GRHydro_mppm_xwind)
                do i = 1, nx
                   if (trivial_rp(i,j,k)) then
                     SpaceMask_SetStateBitsF90(space_mask, i, j, k, type_bitsx, trivialx)
                   else
                     SpaceMask_SetStateBitsF90(space_mask, i, j, k, type_bitsx, not_trivialx)
                   end if
                end do
              end do
            end do
            !$OMP END PARALLEL DO
          endif  !clean_divergence
       else  !evolve_mhd
         !$OMP PARALLEL DO PRIVATE(i, j, k)
         do k = GRHydro_stencil, nz - GRHydro_stencil + 1
           do j = GRHydro_stencil, ny - GRHydro_stencil + 1
           call SimplePPM_1d(GRHydro_eos_handle,0,nx,CCTK_DELTA_SPACE(1),&
                rho(:,j,k),velx(:,j,k),vely(:,j,k),velz(:,j,k),eps(:,j,k),&
                press(:,j,k),rhominus(:,j,k),velxminus(:,j,k),velyminus(:,j,k),&
                velzminus(:,j,k),epsminus(:,j,k),rhoplus(:,j,k),&
                velxplus(:,j,k),velyplus(:,j,k),velzplus(:,j,k),epsplus(:,j,k),&
                trivial_rp(:,j,k), hydro_excision_mask(:,j,k),&
                gxx(:,j,k), gxy(:,j,k), gxz(:,j,k), gyy(:,j,k), gyz(:,j,k), &
                gzz(:,j,k), psi4(:,j,k), lbetax(:,j,k), alp(:,j,k),&
                w_lorentz(:,j,k), &
                1, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_x_left, &
                GRHydro_mppm_eigenvalue_x_right, &
                GRHydro_mppm_xwind)
             do i = 1, nx
                if (trivial_rp(i,j,k)) then
                  SpaceMask_SetStateBitsF90(space_mask, i, j, k, type_bitsx, trivialx)
                else
                  SpaceMask_SetStateBitsF90(space_mask, i, j, k, type_bitsx, not_trivialx)
                end if
             end do
           end do
         end do
         !$OMP END PARALLEL DO
       endif  !evolve_mhd
      if(evolve_tracer.ne.0) then
         !$OMP PARALLEL DO PRIVATE(j, k)
         do k = GRHydro_stencil, nz - GRHydro_stencil + 1
            do j = GRHydro_stencil, ny - GRHydro_stencil + 1
               call SimplePPM_tracer_1d(nx,CCTK_DELTA_SPACE(1),rho(:,j,k), &
                    velx(:,j,k),vely(:,j,k),velz(:,j,k), &
                    tracer(:,j,k,:),tracerminus(:,j,k,:),tracerplus(:,j,k,:), &
                    press(:,j,k))
            end do
         end do
         !$OMP END PARALLEL DO
      end if
      if(evolve_Y_e.ne.0) then
         !$OMP PARALLEL DO PRIVATE(j, k)
         do k = GRHydro_stencil, nz - GRHydro_stencil + 1
            do j = GRHydro_stencil, ny - GRHydro_stencil + 1
               call SimplePPM_ye_1d(nx,CCTK_DELTA_SPACE(1),rho(:,j,k), &
                    velx(:,j,k),vely(:,j,k),velz(:,j,k), &
                    Y_e(:,j,k),Y_e_minus(:,j,k),Y_e_plus(:,j,k), &
                    press(:,j,k))
            end do
         end do
         !$OMP END PARALLEL DO
      end if

    else if (flux_direction == 2) then
      if(evolve_mhd.ne.0) then
        if(clean_divergence.ne.0) then
          !$OMP PARALLEL DO PRIVATE(i, j, k)
          do k = GRHydro_stencil, nz - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1
              call SimplePPM_1dM(GRHydro_eos_handle,0,ny,CCTK_DELTA_SPACE(2),&
                   rho(j,:,k),vely(j,:,k),velz(j,:,k),velx(j,:,k),&
                   Bvecy(j,:,k),Bvecz(j,:,k),Bvecx(j,:,k),psidc(j,:,k),eps(j,:,k),press(j,:,k),&
                   rhominus(j,:,k),velyminus(j,:,k),velzminus(j,:,k),velxminus(j,:,k),&
                   Bvecyminus(j,:,k),Bveczminus(j,:,k),Bvecxminus(j,:,k),psidcminus(j,:,k),epsminus(j,:,k),&
                   rhoplus(j,:,k),velyplus(j,:,k),velzplus(j,:,k),velxplus(j,:,k),&
                   Bvecyplus(j,:,k),Bveczplus(j,:,k),Bvecxplus(j,:,k),psidcplus(j,:,k),epsplus(j,:,k),&
                   1,trivial_rp(j,:,k), hydro_excision_mask(j,:,k),&
                   gyy(j,:,k), gyz(j,:,k), gxy(j,:,k), gzz(j,:,k), gxz(j,:,k), &
                   gxx(j,:,k), psi4(j,:,k), lbetay(j,:,k), alp(j,:,k),&
                   w_lorentz(j,:,k), &
                   2, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_y_left, &
                   GRHydro_mppm_eigenvalue_y_right, &
                   GRHydro_mppm_xwind)
              do i = 1, ny
                if (trivial_rp(j,i,k)) then
                   SpaceMask_SetStateBitsF90(space_mask, j, i, k, type_bitsy, trivialy)
                else
                   SpaceMask_SetStateBitsF90(space_mask, j, i, k, type_bitsy, not_trivialy)
                end if
              end do
            end do
          end do
          !$OMP END PARALLEL DO
        else  !clean_divergence
          !$OMP PARALLEL DO PRIVATE(i, j, k)
          do k = GRHydro_stencil, nz - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1
              call SimplePPM_1dM(GRHydro_eos_handle,0,ny,CCTK_DELTA_SPACE(2),&
                   rho(j,:,k),vely(j,:,k),velz(j,:,k),velx(j,:,k),&
                   Bvecy(j,:,k),Bvecz(j,:,k),Bvecx(j,:,k),dum(j,:,k),eps(j,:,k),press(j,:,k),&
                   rhominus(j,:,k),velyminus(j,:,k),velzminus(j,:,k),velxminus(j,:,k),&
                   Bvecyminus(j,:,k),Bveczminus(j,:,k),Bvecxminus(j,:,k),dumm(j,:,k),epsminus(j,:,k),&
                   rhoplus(j,:,k),velyplus(j,:,k),velzplus(j,:,k),velxplus(j,:,k),&
                   Bvecyplus(j,:,k),Bveczplus(j,:,k),Bvecxplus(j,:,k),dump(j,:,k),epsplus(j,:,k),&
                   0,trivial_rp(j,:,k), hydro_excision_mask(j,:,k),&
                   gyy(j,:,k), gyz(j,:,k), gxy(j,:,k), gzz(j,:,k), gxz(j,:,k), &
                   gxx(j,:,k), psi4(j,:,k), lbetay(j,:,k), alp(j,:,k),&
                   w_lorentz(j,:,k), &
                   2, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_y_left, &
                   GRHydro_mppm_eigenvalue_y_right, &
                   GRHydro_mppm_xwind)
              do i = 1, ny
                if (trivial_rp(j,i,k)) then
                   SpaceMask_SetStateBitsF90(space_mask, j, i, k, type_bitsy, trivialy)
                else
                   SpaceMask_SetStateBitsF90(space_mask, j, i, k, type_bitsy, not_trivialy)
                end if
              end do
            end do
          end do
          !$OMP END PARALLEL DO
        endif  !clean_divergence
      else  !evolve_mhd
        !$OMP PARALLEL DO PRIVATE(i, j, k)
        do k = GRHydro_stencil, nz - GRHydro_stencil + 1
          do j = GRHydro_stencil, nx - GRHydro_stencil + 1
            call SimplePPM_1d(GRHydro_eos_handle,0,ny,CCTK_DELTA_SPACE(2),&
                 rho(j,:,k),vely(j,:,k),velz(j,:,k),velx(j,:,k),eps(j,:,k),&
                 press(j,:,k),rhominus(j,:,k),velyminus(j,:,k),velzminus(j,:,k),&
                 velxminus(j,:,k),epsminus(j,:,k),rhoplus(j,:,k),&
                 velyplus(j,:,k),velzplus(j,:,k),velxplus(j,:,k),epsplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k),&
                 gyy(j,:,k), gyz(j,:,k), gxy(j,:,k), gzz(j,:,k), gxz(j,:,k), &
                 gxx(j,:,k), psi4(j,:,k), lbetay(j,:,k), alp(j,:,k),&
                 w_lorentz(j,:,k), &
                 2, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_y_left, &
                 GRHydro_mppm_eigenvalue_y_right, &
                 GRHydro_mppm_xwind)
            do i = 1, ny
              if (trivial_rp(j,i,k)) then
                 SpaceMask_SetStateBitsF90(space_mask, j, i, k, type_bitsy, trivialy)
              else
                 SpaceMask_SetStateBitsF90(space_mask, j, i, k, type_bitsy, not_trivialy)
              end if
            end do
          end do
        end do
        !$OMP END PARALLEL DO
      endif  !evolve_mhd
      if(evolve_tracer.ne.0) then
         !$OMP PARALLEL DO PRIVATE(j, k)
         do k = GRHydro_stencil, nz - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1
              call SimplePPM_tracer_1d(ny,CCTK_DELTA_SPACE(2),rho(j,:,k), &
                   vely(j,:,k),velz(j,:,k),velx(j,:,k), &
                   tracer(j,:,k,:),tracerminus(j,:,k,:),tracerplus(j,:,k,:), &
                   press(j,:,k))
            end do
         end do
         !$OMP END PARALLEL DO
      end if
      if(evolve_Y_e.ne.0) then
         !$OMP PARALLEL DO PRIVATE(j, k)
         do k = GRHydro_stencil, nz - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1
               call SimplePPM_ye_1d(ny,CCTK_DELTA_SPACE(2),rho(j,:,k), &
                    velx(j,:,k),vely(j,:,k),velz(j,:,k), &
                    Y_e(j,:,k),Y_e_minus(j,:,k),Y_e_plus(j,:,k), &
                    press(j,:,k))
            end do
         end do
         !$OMP END PARALLEL DO
      end if

    else if (flux_direction == 3) then
      if(evolve_mhd.ne.0) then
        if(clean_divergence.ne.0) then
          !$OMP PARALLEL DO PRIVATE(i, j, k)
          do k = GRHydro_stencil, ny - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1
              call SimplePPM_1dM(GRHydro_eos_handle,0,nz,CCTK_DELTA_SPACE(3),&
                   rho(j,k,:),velz(j,k,:),velx(j,k,:),vely(j,k,:),&
                   Bvecz(j,k,:),Bvecx(j,k,:),Bvecy(j,k,:),psidc(j,k,:),eps(j,k,:),press(j,k,:),&
                   rhominus(j,k,:),velzminus(j,k,:),velxminus(j,k,:),velyminus(j,k,:),&
                   Bveczminus(j,k,:),Bvecxminus(j,k,:),Bvecyminus(j,k,:),psidcminus(j,k,:),epsminus(j,k,:),&
                   rhoplus(j,k,:),velzplus(j,k,:),velxplus(j,k,:),velyplus(j,k,:),&
                   Bveczplus(j,k,:),Bvecxplus(j,k,:),Bvecyplus(j,k,:),psidcplus(j,k,:),epsplus(j,k,:),&
                   1,trivial_rp(j,k,:), hydro_excision_mask(j,k,:),&
                   gzz(j,k,:), gxz(j,k,:), gyz(j,k,:), gxx(j,k,:), gxy(j,k,:), &
                   gyy(j,k,:), psi4(j,k,:), lbetaz(j,k,:), alp(j,k,:),&
                   w_lorentz(j,k,:), &
                   3, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_z_left, &
                   GRHydro_mppm_eigenvalue_z_right, &
                   GRHydro_mppm_xwind)
              do i = 1, nz
                if (trivial_rp(j,k,i)) then
                  SpaceMask_SetStateBitsF90(space_mask, j, k, i, type_bitsz, trivialz)
                else
                  SpaceMask_SetStateBitsF90(space_mask, j, k, i, type_bitsz, not_trivialz)
                end if
              end do
            end do
          end do
          !$OMP END PARALLEL DO
        else  !clean_divergence
          !$OMP PARALLEL DO PRIVATE(i, j, k)
          do k = GRHydro_stencil, ny - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1
              call SimplePPM_1dM(GRHydro_eos_handle,0,nz,CCTK_DELTA_SPACE(3),&
                   rho(j,k,:),velz(j,k,:),velx(j,k,:),vely(j,k,:),&
                   Bvecz(j,k,:),Bvecx(j,k,:),Bvecy(j,k,:),dum(j,k,:),eps(j,k,:),press(j,k,:),&
                   rhominus(j,k,:),velzminus(j,k,:),velxminus(j,k,:),velyminus(j,k,:),&
                   Bveczminus(j,k,:),Bvecxminus(j,k,:),Bvecyminus(j,k,:),dumm(j,k,:),epsminus(j,k,:),&
                   rhoplus(j,k,:),velzplus(j,k,:),velxplus(j,k,:),velyplus(j,k,:),&
                   Bveczplus(j,k,:),Bvecxplus(j,k,:),Bvecyplus(j,k,:),dump(j,k,:),epsplus(j,k,:),&
                   0,trivial_rp(j,k,:), hydro_excision_mask(j,k,:),&
                   gzz(j,k,:), gxz(j,k,:), gyz(j,k,:), gxx(j,k,:), gxy(j,k,:), &
                   gyy(j,k,:), psi4(j,k,:), lbetaz(j,k,:), alp(j,k,:),&
                   w_lorentz(j,k,:), &
                   3, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_z_left, &
                   GRHydro_mppm_eigenvalue_z_right, &
                   GRHydro_mppm_xwind)
              do i = 1, nz
                if (trivial_rp(j,k,i)) then
                  SpaceMask_SetStateBitsF90(space_mask, j, k, i, type_bitsz, trivialz)
                else
                  SpaceMask_SetStateBitsF90(space_mask, j, k, i, type_bitsz, not_trivialz)
                end if
              end do
            end do
          end do
          !$OMP END PARALLEL DO
        endif  !clean_divergence
      else  !evolve_mhd
        !$OMP PARALLEL DO PRIVATE(i, j, k)
        do k = GRHydro_stencil, ny - GRHydro_stencil + 1
          do j = GRHydro_stencil, nx - GRHydro_stencil + 1
            call SimplePPM_1d(GRHydro_eos_handle,0,nz,CCTK_DELTA_SPACE(3),&
                 rho(j,k,:),velz(j,k,:),velx(j,k,:),vely(j,k,:),eps(j,k,:),&
                 press(j,k,:),rhominus(j,k,:),velzminus(j,k,:),velxminus(j,k,:),&
                 velyminus(j,k,:),epsminus(j,k,:),rhoplus(j,k,:),&
                 velzplus(j,k,:),velxplus(j,k,:),velyplus(j,k,:),epsplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:),&
                 gzz(j,k,:), gxz(j,k,:), gyz(j,k,:), gxx(j,k,:), gxy(j,k,:), &
                 gyy(j,k,:), psi4(j,k,:), lbetaz(j,k,:), alp(j,k,:),&
                 w_lorentz(j,k,:), &
                 3, j, k, nx, ny, nz, GRHydro_mppm_eigenvalue_z_left, &
                 GRHydro_mppm_eigenvalue_z_right, &
                 GRHydro_mppm_xwind)
            do i = 1, nz
              if (trivial_rp(j,k,i)) then
                SpaceMask_SetStateBitsF90(space_mask, j, k, i, type_bitsz, trivialz)
              else
                SpaceMask_SetStateBitsF90(space_mask, j, k, i, type_bitsz, not_trivialz)
              end if
            end do
          end do
        end do
        !$OMP END PARALLEL DO
      endif  !evolve_mhd
      if(evolve_tracer.ne.0) then
         !$OMP PARALLEL DO PRIVATE(j, k)
         do k = GRHydro_stencil, ny - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1

               call SimplePPM_tracer_1d(nz,CCTK_DELTA_SPACE(3),rho(j,k,:), &
                    velz(j,k,:),velx(j,k,:),vely(j,k,:), &
                    tracer(j,k,:,:),tracerminus(j,k,:,:),tracerplus(j,k,:,:), &
                    press(j,k,:))
            end do
         end do
         !$OMP END PARALLEL DO
      end if
      if(evolve_Y_e.ne.0) then
         !$OMP PARALLEL DO PRIVATE(j, k)
         do k = GRHydro_stencil, ny - GRHydro_stencil + 1
            do j = GRHydro_stencil, nx - GRHydro_stencil + 1
               call SimplePPM_ye_1d(nz,CCTK_DELTA_SPACE(3),rho(j,k,:), &
                    velx(j,k,:),vely(j,k,:),velz(j,k,:), &
                    Y_e(j,k,:),Y_e_minus(j,k,:),Y_e_plus(j,k,:), &
                    press(j,k,:))
            end do
         end do
         !$OMP END PARALLEL DO
      end if

    else
      call CCTK_WARN(0, "Flux direction not x,y,z")
    end if
!!$ PPM ends.

  deallocate(trivial_rp)
  deallocate(psi4, lbetax, lbetay, lbetaz)
  deallocate(dum,dump,dumm)

end subroutine GRHydro_PPMReconstruct_drv