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clover.f90
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!Crown Copyright 2012 AWE.
!
! This file is part of CloverLeaf.
!
! CloverLeaf is free software: you can redistribute it and/or modify it under
! the terms of the GNU General Public License as published by the
! Free Software Foundation, either version 3 of the License, or (at your option)
! any later version.
!
! CloverLeaf is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
! FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
! details.
!
! You should have received a copy of the GNU General Public License along with
! CloverLeaf. If not, see http://www.gnu.org/licenses/.
!> @brief Communication Utilities
!> @author Andy Mallinson, Wayne Gaudin
!> @details Contains all utilities required to run CloverLeaf in a distributed
!> environment, including initialisation, mesh decompostion, reductions and
!> halo exchange using explicit buffers.
!>
!> Note the halo exchange is currently coded as simply as possible and no
!> optimisations have been implemented, such as post receives before sends or packing
!> buffers with multiple data fields. This is intentional so the effect of these
!> optimisations can be measured on large systems, as and when they are added.
!>
!> Even without these modifications CloverLeaf weak scales well on moderately sized
!> systems of the order of 10K cores.
MODULE clover_module
USE data_module
USE definitions_module
IMPLICIT NONE
CONTAINS
SUBROUTINE clover_barrier
sync all
END SUBROUTINE clover_barrier
SUBROUTINE clover_abort
ERROR STOP
END SUBROUTINE clover_abort
SUBROUTINE clover_finalize
INTEGER :: err
CLOSE(g_out)
CALL FLUSH(0)
CALL FLUSH(6)
CALL FLUSH(g_out)
END SUBROUTINE clover_finalize
SUBROUTINE clover_init_comms
IMPLICIT NONE
parallel%parallel=.TRUE.
parallel%image = this_image()
parallel%max_image = num_images()
parallel%task = parallel%image - 1
IF(parallel%image.EQ.1) THEN
parallel%boss=.TRUE.
ENDIF
parallel%boss_task=0
parallel%max_task=parallel%max_image
END SUBROUTINE clover_init_comms
SUBROUTINE clover_get_num_chunks(count)
IMPLICIT NONE
INTEGER :: count
! Should be changed so there can be more than one chunk per mpi task
count=parallel%max_task
END SUBROUTINE clover_get_num_chunks
SUBROUTINE clover_decompose(x_cells,y_cells,left,right,bottom,top)
! This decomposes the mesh into a number of chunks.
! The number of chunks may be a multiple of the number of mpi tasks
! Doesn't always return the best split if there are few factors
! All factors need to be stored and the best picked. But its ok for now
IMPLICIT NONE
INTEGER :: x_cells,y_cells,left(:),right(:),top(:),bottom(:)
INTEGER :: c,delta_x,delta_y
REAL(KIND=8) :: mesh_ratio,factor_x,factor_y
INTEGER :: chunk_x,chunk_y,mod_x,mod_y,split_found
INTEGER :: cx,cy,chunk,add_x,add_y,add_x_prev,add_y_prev
#ifdef LOCAL_SYNC
INTEGER :: numNeighbours,n
#endif
! 2D Decomposition of the mesh
mesh_ratio=real(x_cells)/real(y_cells)
chunk_x=number_of_chunks
chunk_y=1
split_found=0 ! Used to detect 1D decomposition
DO c=1,number_of_chunks
IF (MOD(number_of_chunks,c).EQ.0) THEN
factor_x=number_of_chunks/real(c)
factor_y=c
!Compare the factor ratio with the mesh ratio
IF(factor_x/factor_y.LE.mesh_ratio) THEN
chunk_y=c
chunk_x=number_of_chunks/c
split_found=1
EXIT
ENDIF
ENDIF
ENDDO
IF(split_found.EQ.0.OR.chunk_y.EQ.number_of_chunks) THEN ! Prime number or 1D decomp detected
IF(mesh_ratio.GE.1.0) THEN
chunk_x=number_of_chunks
chunk_y=1
ELSE
chunk_x=1
chunk_y=number_of_chunks
ENDIF
ENDIF
delta_x=x_cells/chunk_x
delta_y=y_cells/chunk_y
mod_x=MOD(x_cells,chunk_x)
mod_y=MOD(y_cells,chunk_y)
! Set up chunk mesh ranges and chunk connectivity
add_x_prev=0
add_y_prev=0
chunk=1
DO cy=1,chunk_y
DO cx=1,chunk_x
add_x=0
add_y=0
IF(cx.LE.mod_x)add_x=1
IF(cy.LE.mod_y)add_y=1
IF (chunk .EQ. parallel%task+1) THEN
left(1) = (cx-1)*delta_x+1+add_x_prev
right(1) = left(1)+delta_x-1+add_x
bottom(1) = (cy-1)*delta_y+1+add_y_prev
top(1) = bottom(1)+delta_y-1+add_y
chunks(1)%chunk_neighbours(chunk_left)=chunk_x*(cy-1)+cx-1
chunks(1)%chunk_neighbours(chunk_right)=chunk_x*(cy-1)+cx+1
chunks(1)%chunk_neighbours(chunk_bottom)=chunk_x*(cy-2)+cx
chunks(1)%chunk_neighbours(chunk_top)=chunk_x*(cy)+cx
chunks(1)%chunk_neighbours(CHUNK_LEFT_TOP) = chunk_x*cy+cx-1
chunks(1)%chunk_neighbours(CHUNK_LEFT_BOTTOM) = chunk_x*(cy-2)+cx-1
chunks(1)%chunk_neighbours(CHUNK_RIGHT_TOP) = chunk_x*cy+cx+1
chunks(1)%chunk_neighbours(CHUNK_RIGHT_BOTTOM) = chunk_x*(cy-2)+cx+1
IF(cx.EQ.1) THEN
chunks(1)%chunk_neighbours(chunk_left)=external_face
chunks(1)%chunk_neighbours(CHUNK_LEFT_TOP)=external_face
chunks(1)%chunk_neighbours(CHUNK_LEFT_BOTTOM)=external_face
ENDIF
IF(cx.EQ.chunk_x) THEN
chunks(1)%chunk_neighbours(chunk_right)=external_face
chunks(1)%chunk_neighbours(CHUNK_RIGHT_TOP)=external_face
chunks(1)%chunk_neighbours(CHUNK_RIGHT_BOTTOM)=external_face
ENDIF
IF(cy.EQ.1) THEN
chunks(1)%chunk_neighbours(chunk_bottom)=external_face
chunks(1)%chunk_neighbours(CHUNK_LEFT_BOTTOM)=external_face
chunks(1)%chunk_neighbours(CHUNK_RIGHT_BOTTOM)=external_face
ENDIF
IF(cy.EQ.chunk_y) THEN
chunks(1)%chunk_neighbours(chunk_top)=external_face
chunks(1)%chunk_neighbours(CHUNK_LEFT_TOP)=external_face
chunks(1)%chunk_neighbours(CHUNK_RIGHT_TOP)=external_face
ENDIF
#ifdef LOCAL_SYNC
numNeighbours=0
IF (chunks(1)%chunk_neighbours(chunk_left).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_right).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_top).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_bottom).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_left_top).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_right_top).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_right_bottom).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_left_bottom).NE.external_face) THEN
numNeighbours = numNeighbours +1
ENDIF
ALLOCATE(chunks(1)%imageNeighbours(numNeighbours))
!caf:may need to update this when multiple chunks per image so that the image is recorded correctly
IF (numNeighbours > 0) THEN
n=1
IF (chunks(1)%chunk_neighbours(chunk_left).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_left)
n=n+1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_right).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_right)
n=n+1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_top).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_top)
n=n+1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_bottom).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_bottom)
n=n+1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_left_top).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_left_top)
n=n+1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_right_top).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_right_top)
n=n+1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_right_bottom).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_right_bottom)
n=n+1
ENDIF
IF (chunks(1)%chunk_neighbours(chunk_left_bottom).NE.external_face) THEN
chunks(1)%imageNeighbours(n) = chunks(1)%chunk_neighbours(chunk_left_bottom)
n=n+1
ENDIF
ENDIF
#endif
ENDIF
IF(cx.LE.mod_x)add_x_prev=add_x_prev+1
chunk=chunk+1
ENDDO
add_x_prev=0
IF(cy.LE.mod_y)add_y_prev=add_y_prev+1
ENDDO
IF(parallel%boss)THEN
WRITE(g_out,*)
WRITE(g_out,*)"Mesh ratio of ",mesh_ratio
WRITE(g_out,*)"Decomposing the mesh into ",chunk_x," by ",chunk_y," chunks"
WRITE(g_out,*)
ENDIF
END SUBROUTINE clover_decompose
SUBROUTINE clover_exchange(fields,depth)
IMPLICIT NONE
INTEGER :: fields(:),depth
INTEGER :: chunk, left_neighbour, right_neighbour, top_neighbour, bottom_neighbour, xinc, yinc
! Assuming 1 patch per task, this will be changed
! Also, not packing all fields for each communication, doing one at a time
! the chunk number which the executing task is responsible for
chunk = 1
left_neighbour = chunks(chunk)%chunk_neighbours(chunk_left)
right_neighbour = chunks(chunk)%chunk_neighbours(chunk_right)
bottom_neighbour = chunks(chunk)%chunk_neighbours(chunk_bottom)
top_neighbour = chunks(chunk)%chunk_neighbours(chunk_top)
!caf: syncronise all processes here to ensure that all have finished the previous phase and there the halo exchange can begin
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
! Assuming 1 patch per task, this will be changed
! Also, not packing all fields for each communication, doing one at a time
IF(fields(FIELD_DENSITY0).EQ.1) THEN
xinc = 0
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%density0( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth ) = &
chunks(chunk)%field%density0(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%density0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%density0(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%density0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%density0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%density0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%density0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_DENSITY1).EQ.1) THEN
xinc = 0
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%density1( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%density1(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%density1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%density1(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%density1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%density1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%density1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%density1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_ENERGY0).EQ.1) THEN
xinc = 0
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%energy0( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%energy0(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%energy0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%energy0(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%energy0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%energy0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%energy0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%energy0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_ENERGY1).EQ.1) THEN
xinc = 0
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%energy1( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%energy1(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%energy1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%energy1(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%energy1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%energy1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%energy1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%energy1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_PRESSURE).EQ.1) THEN
xinc = 0
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%pressure( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%pressure(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%pressure( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%pressure(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%pressure( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%pressure(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%pressure( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%pressure(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_VISCOSITY).EQ.1) THEN
xinc = 0
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%viscosity( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%viscosity(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%viscosity( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%viscosity(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%viscosity( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%viscosity(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%viscosity( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%viscosity(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_SOUNDSPEED).EQ.1) THEN
xinc = 0
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%soundspeed( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%soundspeed(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%soundspeed( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%soundspeed(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%soundspeed( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%soundspeed(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%soundspeed( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%soundspeed(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_XVEL0).EQ.1) THEN
xinc = 1
yinc = 1
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%xvel0( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%xvel0(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%xvel0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%xvel0(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%xvel0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%xvel0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%xvel0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%xvel0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_XVEL1).EQ.1) THEN
xinc = 1
yinc = 1
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%xvel1( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%xvel1(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%xvel1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%xvel1(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%xvel1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%xvel1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%xvel1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%xvel1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_YVEL0).EQ.1) THEN
xinc = 1
yinc = 1
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%yvel0( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%yvel0(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%yvel0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%yvel0(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%yvel0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%yvel0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%yvel0( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%yvel0(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_YVEL1).EQ.1) THEN
xinc = 1
yinc = 1
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%yvel1( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%yvel1(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%yvel1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%yvel1(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%yvel1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%yvel1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%yvel1( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%yvel1(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_VOL_FLUX_X).EQ.1) THEN
xinc = 1
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%vol_flux_x( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%vol_flux_x(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%vol_flux_x( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%vol_flux_x(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%vol_flux_x( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%vol_flux_x(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%vol_flux_x( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%vol_flux_x(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_VOL_FLUX_Y).EQ.1) THEN
xinc = 0
yinc = 1
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%vol_flux_y( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%vol_flux_y(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%vol_flux_y( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%vol_flux_y(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%vol_flux_y( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%vol_flux_y(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%vol_flux_y( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%vol_flux_y(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_MASS_FLUX_X).EQ.1) THEN
xinc = 1
yinc = 0
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%mass_flux_x( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%mass_flux_x(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%mass_flux_x( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%mass_flux_x(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif
IF(bottom_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[bottom_neighbour]%field%mass_flux_x( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+yinc+1:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%mass_flux_x(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min+yinc:chunks(chunk)%field%y_min+yinc-1+depth)
ENDIF
IF(top_neighbour.NE.external_face) THEN
!caf: one sided put to the image under the current image
chunks(chunk)[top_neighbour]%field%mass_flux_x( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_min-1) = &
chunks(chunk)%field%mass_flux_x(chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_max+1-depth:chunks(chunk)%field%y_max)
ENDIF
ENDIF
IF(fields(FIELD_MASS_FLUX_Y).EQ.1) THEN
xinc = 0
yinc = 1
IF(left_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the left of the current image
chunks(chunk)[left_neighbour]%field%mass_flux_y( &
chunks(chunk)%field%x_max+xinc+1:chunks(chunk)%field%x_max+xinc+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%mass_flux_y(chunks(chunk)%field%x_min+xinc:chunks(chunk)%field%x_min+xinc-1+depth, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
IF(right_neighbour.NE.external_face) THEN
!caf: one sided put to the image on the right of the current image
chunks(chunk)[right_neighbour]%field%mass_flux_y( &
chunks(chunk)%field%x_min-depth:chunks(chunk)%field%x_min-1, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth) = &
chunks(chunk)%field%mass_flux_y(chunks(chunk)%field%x_max+1-depth:chunks(chunk)%field%x_max, &
chunks(chunk)%field%y_min-depth:chunks(chunk)%field%y_max+yinc+depth)
ENDIF
! caf: can be replaced with a sync with just the neighbours
#ifdef LOCAL_SYNC
sync images( chunks(chunk)%imageNeighbours )
#else
sync all
#endif