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Example Using F77-Callable
HPF Caller
PROGRAM EXAMPLE
INTEGER, PARAMETER :: NX = 100, NY
= 100
REAL, DIMENSION(NX,NY) :: X
!HPF$ DISTRIBUTE(BLOCK,BLOCK) :: X
! Local subgrid parameters are declared per processor
! for a rank -two array
INTEGER, DIMENSION(NUMBER_OF_PROCESSORS(),2)
::
& LB, UB, LB_EMBED, UB_EMBED
!HPF$ DISTRIBUTE(BLOCK,*) :: LB, UB, LB_EMBED, UB_EMBED
! Define interfaces
INTERFACE
EXTRINSIC(F77_LOCAL)
SUBROUTINE LOCAL1(
& LB1, UB1,
LB_EMBED1, UB_EMBED1,
& LB2, UB2,
LB_EMBED2, UB_EMBED2, X, X_DESC )
INTEGER, DIMENSION(:)
::
& LB1, UB1,
LB_EMBED1, UB_EMBED1,
& LB2, UB2,
LB_EMBED2, UB_EMBED2
! X is passed twice, both times without local reordering.
! First, it is passed by reference for accessing array elements.
REAL, DIMENSION(:,:),
LAYOUT('HPF_ARRAY'),
&
PASS_BY('*') :: X
! It is also passed by descriptor for use in F77 LOCAL
! LIBRARY subroutines only.
REAL, DIMENSION(:,:),
LAYOUT('HPF_ARRAY'),
&
PASS_BY('HPF_HANDLE') :: X_DESC
!HPF$ DISTRIBUTE(BLOCK) :: LB1, UB1, LB_EMBED1, UB_EMBED1
!HPF$ DISTRIBUTE(BLOCK) :: LB2, UB2, LB_EMBED2, UB_EMBED2
!HPF$ DISTRIBUTE(BLOCK,BLOCK) :: X
END
END INTERFACE
! Initialize values
! ( Assume stride = 1 and no axis permutation )
CALL HPF_SUBGRID_INFO( X, IERR,
& LB=LB, LB_EMBED=LB_EMBED,
& UB=UB, UB_EMBED=UB_EMBED)
IF (IERR.NE.0) STOP 'ERROR!'
CALL LOCAL1(
& LB(:,1), UB(:,1), LB_EMBED(:,1),
UB_EMBED(:,1),
& LB(:,2), UB(:,2), LB_EMBED(:,2),
UB_EMBED(:,2), X, X )
END
