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 /*@@
   @file      GRHydro_MP5Reconstruct_drv.F90
   @date      Fri Jan 3 2013
   @author    Christian Reisswig, Bruno C. Mundim, Joshua Faber, Christian D. Ott
   @desc 
   Driver routine to perform the MP5 reconstruction.
   @enddesc 
 @@*/

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

#include "SpaceMask.h"

#define velx(i,j,k) vup(i,j,k,1)
#define vely(i,j,k) vup(i,j,k,2)
#define velz(i,j,k) vup(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) Bprim(i,j,k,1)
#define Bvecy(i,j,k) Bprim(i,j,k,2)
#define Bvecz(i,j,k) Bprim(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_MP5Reconstruct_drv
   @date       Fri Jan 3 2013
   @author     Christian Reisswig, Luca Baiotti, Ian Hawke, Bruno C. Mundim, Joshua Faber, Christian D. Ott
   @desc 
   A driver routine to do MP5 reconstruction. 
   @enddesc 
   @calls     
   @calledby   
   @history 
 
   @endhistory 

@@*/

subroutine GRHydro_MP5Reconstruct_drv(CCTK_ARGUMENTS)
  
  implicit none
  
  ! save memory when MP is not used
  ! TARGET as to be before DECLARE_CCTK_ARGUMENTS for gcc 4.1
  TARGET gaa, gab, gac, gbb, gbc, gcc
  TARGET gxx, gxy, gxz, gyy, gyz, gzz
  TARGET vel, lvel
  TARGET Bvec, lBvec

  DECLARE_CCTK_ARGUMENTS
  DECLARE_CCTK_PARAMETERS
  DECLARE_CCTK_FUNCTIONS

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

  logical, dimension(:,:,:), allocatable :: trivial_rp

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

  CCTK_REAL, dimension(:,:,:),allocatable :: &
       &dum, dump, dumm

  CCTK_INT :: ierr
  
  ! save memory when MP is not used
  CCTK_INT :: GRHydro_UseGeneralCoordinates
  CCTK_REAL, DIMENSION(:,:,:), POINTER :: g11, g12, g13, g22, g23, g33
  CCTK_REAL, DIMENSION(:,:,:,:), POINTER :: vup, Bprim

  if (GRHydro_UseGeneralCoordinates(cctkGH).ne.0) then
    g11 => gaa
    g12 => gab
    g13 => gac
    g22 => gbb
    g23 => gbc
    g33 => gcc
    vup => lvel
    Bprim => lBvec
  else
    g11 => gxx
    g12 => gxy
    g13 => gxz
    g22 => gyy
    g23 => gyz
    g33 => gzz
    vup => vel
    Bprim => Bvec
  end if

  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(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 dum dump dumm")
  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)

!!$ Initialize variables that store reconstructed quantities:

  !$OMP PARALLEL DO PRIVATE(i,j,k)
  do k=1,cctk_lsh(3)
     do j=1,cctk_lsh(2)
        do i=1,cctk_lsh(1)
           trivial_rp(i,j,k) = .false.
           rhoplus(i,j,k) = 0.0d0
           rhominus(i,j,k)= 0.0d0
           epsplus(i,j,k) = 0.0d0
           epsminus(i,j,k) = 0.0d0
           velxplus(i,j,k) = 0.0d0
           velxminus(i,j,k) = 0.0d0
           velyplus(i,j,k) = 0.0d0
           velyminus(i,j,k) = 0.0d0
           velzplus(i,j,k) = 0.0d0
           velzminus(i,j,k) = 0.0d0

           if(evolve_mhd.ne.0) then
             Bvecxplus(i,j,k) = 0.0d0
             Bvecxminus(i,j,k) = 0.0d0
             Bvecyplus(i,j,k) = 0.0d0
             Bvecyminus(i,j,k) = 0.0d0
             Bveczplus(i,j,k) = 0.0d0
             Bveczminus(i,j,k) = 0.0d0
             if(clean_divergence.ne.0) then
                psidcplus(i,j,k) = 0.0d0
                psidcminus(i,j,k) = 0.0d0
             endif
           endif

           if (evolve_entropy .ne. 0) then
              entropyplus(i,j,k) = 0.0d0
              entropyminus(i,j,k) = 0.0d0
           endif

           if (evolve_tracer .ne. 0) then
              tracerplus(i,j,k,:) = 0.0d0
              tracerminus(i,j,k,:) = 0.0d0
           endif

           if (evolve_Y_e .ne. 0) then
              Y_e_plus(i,j,k) = 0.0d0
              Y_e_minus(i,j,k) = 0.0d0
           endif

           if (evolve_temper .ne. 0) then
              ! set this to cell center value to have
              ! good initial guesses at interfaces
              ! in case we don't reconstruct temp
              tempplus(i,j,k) = temperature(i,j,k)
              tempminus(i,j,k) = temperature(i,j,k)
           endif

        enddo
     enddo
  enddo
  !$OMP END PARALLEL DO

!!$ MP5 starts:
     if (evolve_tracer .ne. 0) then
        do itracer=1,number_of_tracers
           call tvdreconstruct(nx, ny, nz, xoffset, yoffset, zoffset, &
                tracer(:,:,:,itracer), tracerplus(:,:,:,itracer), &
                tracerminus(:,:,:,itracer), trivial_rp, &
                hydro_excision_mask)
        enddo
     end if

    if (flux_direction == 1) then
      ! constraint transport needs to be able to average fluxes in the directions
      ! other that flux_direction, which in turn need the primitives on interfaces
      !$OMP PARALLEL DO PRIVATE(i, j, k)
      do k = GRHydro_stencil, cctk_lsh(3) - GRHydro_stencil + 1 + transport_constraints
        do j = GRHydro_stencil, cctk_lsh(2) - GRHydro_stencil + 1 + transport_constraints
          if (CCTK_EQUALS(recon_vars,"primitive")) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                 rho(:,j,k),rhominus(:,j,k),rhoplus(:,j,k),&
                 trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            if (reconstruct_Wv.eq.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                  velx(:,j,k),velxminus(:,j,k),velxplus(:,j,k),&
                  trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                  vely(:,j,k),velyminus(:,j,k),velyplus(:,j,k),&
                  trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                  velz(:,j,k),velzminus(:,j,k),velzplus(:,j,k),&
                  trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            else
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                  w_lorentz(:,j,k)*velx(:,j,k),velxminus(:,j,k),velxplus(:,j,k),&
                  trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                  w_lorentz(:,j,k)*vely(:,j,k),velyminus(:,j,k),velyplus(:,j,k),&
                  trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                  w_lorentz(:,j,k)*velz(:,j,k),velzminus(:,j,k),velzplus(:,j,k),&
                  trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call undo_Wv(nx, velxminus(:,j,k), velyminus(:,j,k), velzminus(:,j,k),&
                                velxplus(:,j,k),velyplus(:,j,k),velzplus(:,j,k),&
                                g11(:,j,k),g12(:,j,k),g13(:,j,k),g22(:,j,k),g23(:,j,k),g33(:,j,k))
            endif
            call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                 eps(:,j,k),epsminus(:,j,k),epsplus(:,j,k),&
                 trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            if(evolve_Y_e.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    Y_e(:,j,k),Y_e_minus(:,j,k),Y_e_plus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            endif
            if(evolve_temper.ne.0.and.reconstruct_temper.ne.0) then 
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    temperature(:,j,k),tempminus(:,j,k),tempplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            endif
            if(evolve_mhd.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    Bvecx(:,j,k),Bvecxminus(:,j,k),Bvecxplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    Bvecy(:,j,k),Bvecyminus(:,j,k),Bvecyplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    Bvecz(:,j,k),Bveczminus(:,j,k),Bveczplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            endif
            if (evolve_entropy .ne. 0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    entropy(:,j,k),entropyminus(:,j,k),entropyplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            endif
          else if (CCTK_EQUALS(recon_vars,"conservative")) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                 dens(:,j,k),densminus(:,j,k),densplus(:,j,k),&
                 trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                 sx(:,j,k),sxminus(:,j,k),sxplus(:,j,k),&
                 trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                 sy(:,j,k),syminus(:,j,k),syplus(:,j,k),&
                 trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                 sz(:,j,k),szminus(:,j,k),szplus(:,j,k),&
                 trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                 tau(:,j,k),tauminus(:,j,k),tauplus(:,j,k),&
                 trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            if(evolve_mhd.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    Bconsx(:,j,k),Bconsxminus(:,j,k),Bconsxplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    Bconsy(:,j,k),Bconsyminus(:,j,k),Bconsyplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    Bconsz(:,j,k),Bconszminus(:,j,k),Bconszplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            endif
            if (evolve_entropy .ne. 0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                    entropycons(:,j,k),entropyconsminus(:,j,k),entropyconsplus(:,j,k),&
                    trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
            endif
          else
            !$OMP CRITICAL
            call CCTK_WARN(0, "Variable type to reconstruct not recognized.")
            !$OMP END CRITICAL
          end if

          if(evolve_mhd.ne.0.and.clean_divergence.ne.0) then
             call GRHydro_MP5Reconstruct1d(cctk_lsh(1),&
                  psidc(:,j,k),psidcminus(:,j,k),psidcplus(:,j,k),&
                  trivial_rp(:,j,k), hydro_excision_mask(:,j,k))
          endif

          do i = 1, cctk_lsh(1)
            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
      !$OMP END PARALLEL DO
    else if (flux_direction == 2) then
      ! constraint transport needs to be able to average fluxes in the directions
      ! other that flux_direction, which in turn need the primitives on interfaces
      !$OMP PARALLEL DO PRIVATE(i, j, k)
      do k = GRHydro_stencil, cctk_lsh(3) - GRHydro_stencil + 1 + transport_constraints
        do j = GRHydro_stencil, cctk_lsh(1) - GRHydro_stencil + 1 + transport_constraints
          if (CCTK_EQUALS(recon_vars,"primitive")) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 rho(j,:,k),rhominus(j,:,k),rhoplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            if (reconstruct_Wv.eq.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                  velx(j,:,k),velxminus(j,:,k),velxplus(j,:,k),&
                  trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                  vely(j,:,k),velyminus(j,:,k),velyplus(j,:,k),&
                  trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                  velz(j,:,k),velzminus(j,:,k),velzplus(j,:,k),&
                  trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            else
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                  w_lorentz(j,:,k)*velx(j,:,k),velxminus(j,:,k),velxplus(j,:,k),&
                  trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                  w_lorentz(j,:,k)*vely(j,:,k),velyminus(j,:,k),velyplus(j,:,k),&
                  trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                  w_lorentz(j,:,k)*velz(j,:,k),velzminus(j,:,k),velzplus(j,:,k),&
                  trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call undo_Wv(ny, velyminus(j,:,k), velzminus(j,:,k), velxminus(j,:,k),&
                                velyplus(j,:,k),velzplus(j,:,k),velxplus(j,:,k),&
                                g22(j,:,k), g23(j,:,k), g12(j,:,k), g33(j,:,k), g13(j,:,k), g11(j,:,k))
            endif
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 eps(j,:,k),epsminus(j,:,k),epsplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            if(evolve_Y_e.ne.0) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 Y_e(j,:,k),Y_e_minus(j,:,k),Y_e_plus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            endif
            if(evolve_temper.ne.0.and.reconstruct_temper.ne.0) then 
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    temperature(j,:,k),tempminus(j,:,k),tempplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            endif
            if(evolve_mhd.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    Bvecx(j,:,k),Bvecxminus(j,:,k),Bvecxplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    Bvecy(j,:,k),Bvecyminus(j,:,k),Bvecyplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    Bvecz(j,:,k),Bveczminus(j,:,k),Bveczplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            endif
            if (evolve_entropy .ne. 0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    entropy(j,:,k),entropyminus(j,:,k),entropyplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            endif
         else if (CCTK_EQUALS(recon_vars,"conservative")) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 dens(j,:,k),densminus(j,:,k),densplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 sx(j,:,k),sxminus(j,:,k),sxplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 sy(j,:,k),syminus(j,:,k),syplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 sz(j,:,k),szminus(j,:,k),szplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 tau(j,:,k),tauminus(j,:,k),tauplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            if(evolve_mhd.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    Bconsx(j,:,k),Bconsxminus(j,:,k),Bconsxplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    Bconsy(j,:,k),Bconsyminus(j,:,k),Bconsyplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    Bconsz(j,:,k),Bconszminus(j,:,k),Bconszplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            endif
            if (evolve_entropy .ne. 0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    entropycons(j,:,k),entropyconsminus(j,:,k),entropyconsplus(j,:,k),&
                    trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
            endif
          else
            !$OMP CRITICAL
            call CCTK_WARN(0, "Variable type to reconstruct not recognized.")
            !$OMP END CRITICAL
          end if

          if(evolve_mhd.ne.0.and.clean_divergence.ne.0) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                 psidc(j,:,k),psidcminus(j,:,k),psidcplus(j,:,k),&
                 trivial_rp(j,:,k), hydro_excision_mask(j,:,k))
          endif

          do i = 1, cctk_lsh(2)
            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
      !$OMP END PARALLEL DO
    else if (flux_direction == 3) then
      ! constraint transport needs to be able to average fluxes in the directions
      ! other that flux_direction, which in turn need the primitives on interfaces
      !$OMP PARALLEL DO PRIVATE(i, j, k)
      do k = GRHydro_stencil, cctk_lsh(2) - GRHydro_stencil + 1 + transport_constraints
        do j = GRHydro_stencil, cctk_lsh(1) - GRHydro_stencil + 1 + transport_constraints
          if (CCTK_EQUALS(recon_vars,"primitive")) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                 rho(j,k,:),rhominus(j,k,:),rhoplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            if (reconstruct_Wv.eq.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                  velx(j,k,:),velxminus(j,k,:),velxplus(j,k,:),&
                  trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                  vely(j,k,:),velyminus(j,k,:),velyplus(j,k,:),&
                  trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                  velz(j,k,:),velzminus(j,k,:),velzplus(j,k,:),&
                  trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            else
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                  w_lorentz(j,k,:)*velx(j,k,:),velxminus(j,k,:),velxplus(j,k,:),&
                  trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                  w_lorentz(j,k,:)*vely(j,k,:),velyminus(j,k,:),velyplus(j,k,:),&
                  trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                  w_lorentz(j,k,:)*velz(j,k,:),velzminus(j,k,:),velzplus(j,k,:),&
                  trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call undo_Wv(nz, velzminus(j,k,:), velxminus(j,k,:), velyminus(j,k,:),&
                                velzplus(j,k,:),velxplus(j,k,:),velyplus(j,k,:),&
                                g33(j,k,:), g13(j,k,:), g23(j,k,:), g11(j,k,:), g12(j,k,:),g22(j,k,:))
            endif
            call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                 eps(j,k,:),epsminus(j,k,:),epsplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            if(evolve_Y_e.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    Y_e(j,k,:),Y_e_minus(j,k,:),Y_e_plus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            endif
            if(evolve_temper.ne.0.and.reconstruct_temper.ne.0) then 
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    temperature(j,k,:),tempminus(j,k,:),tempplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            endif
            if(evolve_mhd.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    Bvecx(j,k,:),Bvecxminus(j,k,:),Bvecxplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    Bvecy(j,k,:),Bvecyminus(j,k,:),Bvecyplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    Bvecz(j,k,:),Bveczminus(j,k,:),Bveczplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            endif
            if (evolve_entropy .ne. 0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(2),&
                    entropy(j,k,:),entropyminus(j,k,:),entropyplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            endif
          else if (CCTK_EQUALS(recon_vars,"conservative")) then
            call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                 dens(j,k,:),densminus(j,k,:),densplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                 sx(j,k,:),sxminus(j,k,:),sxplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                 sy(j,k,:),syminus(j,k,:),syplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                 sz(j,k,:),szminus(j,k,:),szplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                 tau(j,k,:),tauminus(j,k,:),tauplus(j,k,:),&
                 trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            if(evolve_mhd.ne.0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    Bconsx(j,k,:),Bconsxminus(j,k,:),Bconsxplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    Bconsy(j,k,:),Bconsyminus(j,k,:),Bconsyplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    Bconsz(j,k,:),Bconszminus(j,k,:),Bconszplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            endif
            if (evolve_entropy .ne. 0) then
               call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                    entropycons(j,k,:),entropyconsminus(j,k,:),entropyconsplus(j,k,:),&
                    trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
            endif
          else
            !$OMP CRITICAL
            call CCTK_WARN(0, "Variable type to reconstruct not recognized.")
            !$OMP END CRITICAL
          end if

          if(evolve_mhd.ne.0.and.clean_divergence.ne.0) then
             call GRHydro_MP5Reconstruct1d(cctk_lsh(3),&
                  psidc(j,k,:),psidcminus(j,k,:),psidcplus(j,k,:),&
                  trivial_rp(j,k,:), hydro_excision_mask(j,k,:))
          endif

          do i = 1, cctk_lsh(3)
            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
      !$OMP END PARALLEL DO
    else
      call CCTK_WARN(0, "Flux direction not x,y,z")
    end if
!!$ MP5 ends.


  deallocate(trivial_rp)
  deallocate(dum,dump,dumm)


end subroutine GRHydro_MP5Reconstruct_drv