inter_minmax_node.F

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!||====================================================================
!||    inter_minmax_node      ../engine/source/interfaces/generic/inter_minmax_node.F
!||--- called by ------------------------------------------------------
!||    inter_init_component   ../engine/source/interfaces/generic/inter_init_component.F90
!||--- calls      -----------------------------------------------------
!||    my_barrier             ../engine/source/system/machine.f
!||--- uses       -----------------------------------------------------
!||    intbufdef_mod          ../common_source/modules/interfaces/intbufdef_mod.F90
!||    inter_struct_mod       ../engine/share/modules/inter_struct_mod.F
!||    message_mod            ../engine/share/message_module/message_mod.F
!||====================================================================
        SUBROUTINE inter_minmax_node( ITASK,box_limit,X )
!$COMMENT
!       INTER_MINMAX_NODE description :
!       compute the minimal & maximal positions      
!
!       INTER_MINMAX_NODE organization :
!       loop over the nodes & min+max computation
!$ENDCOMMENT
C-----------------------------------------------
C   M o d u l e s
C-----------------------------------------------
        USE intbufdef_mod  
        USE inter_struct_mod
        USE message_mod
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
#include      "comlock.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com04_c.inc"
#include      "task_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
        INTEGER, INTENT(in) :: ITASK
        my_real, dimension(6), intent(inout) :: box_limit !< upper & lower bound of the box
        my_real, DIMENSION(3,NUMNOD), INTENT(in) :: x            !   position
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
        INTEGER :: FIRST, LAST
        INTEGER :: I,J
        my_real, DIMENSION(3) :: max_limit,min_limit
!   ----------------------------------------
 
        max_limit(1:3) = -ep30
        min_limit(1:3) = ep30
        first = 1+itask*numnod/nthread
        last = (itask+1)*numnod/nthread
        !   ------------------
        !   find the min & max position 
        DO i=first,last
            DO j=1,3
                max_limit(j) = max(max_limit(j),x(j,i))
                min_limit(j) = min(min_limit(j),x(j,i))
            ENDDO            
        ENDDO
        !   ------------------
 
        !   ------------------
        !   omp reduction 
#include "lockon.inc"
        box_limit(1) = max(box_limit(1),max_limit(1))
        box_limit(2) = max(box_limit(2),max_limit(2))
        box_limit(3) = max(box_limit(3),max_limit(3))
 
        box_limit(4) = min(box_limit(4),min_limit(1))
        box_limit(5) = min(box_limit(5),min_limit(2))
        box_limit(6) = min(box_limit(6),min_limit(3))
#include "lockoff.inc"
        !   ------------------
        CALL my_barrier()
 
        RETURN
        END SUBROUTINE inter_minmax_node