spmd_box_limit_reduction.F File Reference

#include "implicit_f.inc"
#include "spmd.inc"

Go to the source code of this file.

Functions/Subroutines
subroutine	spmd_box_limit_reduction (nb_inter_sorted, box_limit)

Function/Subroutine Documentation

spmd_box_limit_reduction()

subroutine spmd_box_limit_reduction	(	integer, intent(in)	nb_inter_sorted,
		intent(inout)	box_limit )

Parameters

[in]

nb_inter_sorted

number of interfaces that need to be sorted

Definition at line 34 of file spmd_box_limit_reduction.F.

!$COMMENT
!       SPMD_GRID_LIMIT_REDUCTION description :
!       compute the minimal & maximal positions      
!
!       SPMD_GRID_LIMIT_REDUCTION organization :
!       loop over the nodes & min+max computation
!$ENDCOMMENT
C-----------------------------------------------
C   M o d u l e s
C-----------------------------------------------
        USE inter_struct_mod
        USE spmd_mod
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   M e s s a g e   P a s s i n g
C-----------------------------------------------
#include "spmd.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
        INTEGER, INTENT(in) :: NB_INTER_SORTED        !< number of interfaces that need to be sorted
        my_real, dimension(6), intent(inout) :: box_limit !< upper & lower bound of the box
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
        INTEGER :: I
        REAL(kind=8), dimension(6) :: buffer_s,buffer_r
#ifdef MPI        
        INTEGER :: ierror
        INTEGER :: STATUS_(MPI_STATUS_SIZE)
        CHARACTER(len=4) :: MY_OPERATION
C-----------------------------------------------
        !   ------------------  
        !   globalization of min/max position      
        DO i=1,3
            buffer_s(i) = box_limit(i)  ! max values
            buffer_s(3+i) = -one * box_limit(3+i)   ! min values
        ENDDO
        !   ------------------
        my_operation(1:4) = ''
        my_operation(1:3) = "MAX"
        
        CALL spmd_allreduce(buffer_s,buffer_r,6,spmd_max)
        !   ------------------
        IF(nb_inter_sorted>0) THEN
            DO i=1,3
                box_limit(i) = buffer_r(i)
                box_limit(3+i) = -one * buffer_r(3+i)
            ENDDO 
        ENDIF
        !   ------------------
#endif
        RETURN