Prescriptive Distribution

Can prescribe alignment and distribution,

• may cause remapping,
• mapping is restored on procedure exit.

For example,

    SUBROUTINE Subby(A,B,RES)
     IMPLICIT NONE
     REAL, DIMENSION(:,:), INTENT(IN)  :: A, B
     REAL, DIMENSION(:,:), INTENT(OUT) :: RES
!HPF$ PROCESSORS, DIMENSION(2,2)       :: P
!HPF$ TEMPLATE, DIMENSION(4,6)         :: T
!HPF$ ALIGN (:,:) WITH T(:,:)          :: A, B, RES
!HPF$ DISTRIBUTE (BLOCK,BLOCK) ONTO P  :: T
       ...
    END SUBROUTINE Subby

In the subroutine Subby, the three dummy arguments A, B and RES will be mapped as specified in the HPF directives. If the actual arguments are not mapped like this at the call site then remapping will occur.

If an interface is to be given then the mapping directives which apply to the dummy arguments should be included.