Array Indexing

• There are several ways to index arrays:

• • The addressing scheme will have impact on the performance
  • Arrays should be accessed in most natural direct way for compiler to apply loop optimization techniques

Direct Addressing ++

DO j=1,M

DO i=1,n

… A(i,j) ….

ENDDO ENDDO

Explicit Addressing +

DO j=1,M

DO i=1,N

… A(i+(j-1)*N) …

ENDDO ENDDO

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