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pack_kernel.f90
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pack_kernel.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 Fortran mpi buffer packing kernel
!> @author Wayne Gaudin
!> @details Packs/unpacks mpi send and receive buffers
MODULE pack_kernel_module
CONTAINS
SUBROUTINE pack_left_right_buffers(x_min,x_max,y_min,y_max, &
chunk_left,chunk_right,external_face, &
x_inc,y_inc,depth,size, &
field,left_snd_buffer,right_snd_buffer)
IMPLICIT NONE
INTEGER :: x_min,x_max,y_min,y_max
INTEGER :: chunk_left,chunk_right,external_face
INTEGER :: x_inc,y_inc,depth,size
REAL(KIND=8) :: field(x_min-2:x_max+2+x_inc, y_min-2:y_max+2+y_inc) ! This seems to work for any type of mesh data
REAL(KIND=8) :: left_snd_buffer(2*(y_max+5)),right_snd_buffer(2*(y_max+5))
INTEGER :: j,k,index
!$OMP PARALLEL
IF(chunk_left.NE.external_face) THEN
!$OMP DO PRIVATE(index)
DO k=y_min-depth,y_max+y_inc+depth
DO j=1,depth
index=j+(k+depth-1)*depth
left_snd_buffer(index)=field(x_min+x_inc-1+j,k)
ENDDO
ENDDO
!$OMP END DO
ENDIF
IF(chunk_right.NE.external_face) THEN
!$OMP DO PRIVATE(index)
DO k=y_min-depth,y_max+y_inc+depth
DO j=1,depth
index=j+(k+depth-1)*depth
right_snd_buffer(index)=field(x_max+1-j,k)
ENDDO
ENDDO
!$OMP END DO
ENDIF
!$OMP END PARALLEL
END SUBROUTINE pack_left_right_buffers
SUBROUTINE unpack_left_right_buffers(x_min,x_max,y_min,y_max, &
chunk_left,chunk_right,external_face, &
x_inc,y_inc,depth,size, &
field,left_rcv_buffer,right_rcv_buffer)
IMPLICIT NONE
INTEGER :: x_min,x_max,y_min,y_max
INTEGER :: chunk_left,chunk_right,external_face
INTEGER :: x_inc,y_inc,depth,size
REAL(KIND=8) :: field(x_min-2:x_max+2+x_inc, y_min-2:y_max+2+y_inc) ! This seems to work for any type of mesh data
REAL(KIND=8) :: left_rcv_buffer(2*(y_max+5)),right_rcv_buffer(2*(y_max+5))
INTEGER :: j,k,index
!$OMP PARALLEL
IF(chunk_left.NE.external_face) THEN
!$OMP DO PRIVATE(index)
DO k=y_min-depth,y_max+y_inc+depth
DO j=1,depth
index=j+(k+depth-1)*depth
field(x_min-j,k)=left_rcv_buffer(index)
ENDDO
ENDDO
!$OMP END DO
ENDIF
IF(chunk_right.NE.external_face) THEN
!$OMP DO PRIVATE(index)
DO k=y_min-depth,y_max+y_inc+depth
DO j=1,depth
index=j+(k+depth-1)*depth
field(x_max+x_inc+j,k)=right_rcv_buffer(index)
ENDDO
ENDDO
!$OMP END DO
ENDIF
!$OMP END PARALLEL
END SUBROUTINE unpack_left_right_buffers
SUBROUTINE pack_top_bottom_buffers(x_min,x_max,y_min,y_max, &
chunk_bottom,chunk_top,external_face, &
x_inc,y_inc,depth,size, &
field,bottom_snd_buffer,top_snd_buffer)
IMPLICIT NONE
INTEGER :: x_min,x_max,y_min,y_max
INTEGER :: chunk_bottom,chunk_top,external_face
INTEGER :: x_inc,y_inc,depth,size
REAL(KIND=8) :: field(x_min-2:x_max+2+x_inc, y_min-2:y_max+2+y_inc) ! This seems to work for any type of mesh data
REAL(KIND=8) :: bottom_snd_buffer(2*(x_max+5)),top_snd_buffer(2*(x_max+5))
INTEGER :: j,k,index
!$OMP PARALLEL
IF(chunk_bottom.NE.external_face) THEN
DO k=1,depth
!$OMP DO PRIVATE(index)
DO j=x_min-depth,x_max+x_inc+depth
index=j+depth+(k-1)*(x_max+x_inc+(2*depth))
bottom_snd_buffer(index)=field(j,y_min+y_inc-1+k)
ENDDO
!$OMP END DO
ENDDO
ENDIF
IF(chunk_top.NE.external_face) THEN
DO k=1,depth
!$OMP DO PRIVATE(index)
DO j=x_min-depth,x_max+x_inc+depth
index=j+depth+(k-1)*(x_max+x_inc+(2*depth))
top_snd_buffer(index)=field(j,y_max+1-k)
ENDDO
!$OMP END DO
ENDDO
ENDIF
!$OMP END PARALLEL
END SUBROUTINE pack_top_bottom_buffers
SUBROUTINE unpack_top_bottom_buffers(x_min,x_max,y_min,y_max, &
chunk_bottom,chunk_top,external_face, &
x_inc,y_inc,depth,size, &
field,bottom_rcv_buffer,top_rcv_buffer)
IMPLICIT NONE
INTEGER :: x_min,x_max,y_min,y_max
INTEGER :: chunk_bottom,chunk_top,external_face
INTEGER :: x_inc,y_inc,depth,size
REAL(KIND=8) :: field(x_min-2:x_max+2+x_inc, y_min-2:y_max+2+y_inc) ! This seems to work for any type of mesh data
REAL(KIND=8) :: bottom_rcv_buffer(2*(x_max+5)),top_rcv_buffer(2*(x_max+5))
INTEGER :: j,k,index
!$OMP PARALLEL
IF(chunk_bottom.NE.external_face) THEN
DO k=1,depth
!$OMP DO PRIVATE(index)
DO j=x_min-depth,x_max+x_inc+depth
index=j+depth+(k-1)*(x_max+x_inc+(2*depth))
field(j,y_min-k)=bottom_rcv_buffer(index)
ENDDO
!$OMP END DO
ENDDO
ENDIF
IF(chunk_top.NE.external_face) THEN
DO k=1,depth
!$OMP DO PRIVATE(index)
DO j=x_min-depth,x_max+x_inc+depth
index=j+depth+(k-1)*(x_max+x_inc+(2*depth))
field(j,y_max+y_inc+k)=top_rcv_buffer(index)
ENDDO
!$OMP END DO
ENDDO
ENDIF
!$OMP END PARALLEL
END SUBROUTINE unpack_top_bottom_buffers
END MODULE pack_kernel_module