REFLECT / LOCAL Directive

• REFLECT: Set values into the SHADOW area from its original.

• LOCAL: Assert no communication required

  • cf. RESIDENT : Communication among active processors may be required

REAL A(N),B(N)

!HPF$ DISTRIBUTE (BLOCK)::A,B

!HPF$ SHADOW(1)::A

DO I=1,N

A(I) = ...

ENDDO

!HPF$ REFLECT <object-list>

DO I=2,N-1

!HPF$ ON HOME(B(I)),LOCAL(A)

B(I)=A(I-1)+A(I)+A(I+1)

ENDDO

LOCAL

REFLECT

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