Separate HTML for Basic Foil 46 Advanced Mapping Directives -- ReDistribution and ReAlign

Basic HTML version of Foils prepared 17 Sept 1996

Foil 46 Advanced Mapping Directives -- ReDistribution and ReAlign

From New CPS615HPF and Fortran90 Discussion Sept 17 96 Basic Simulation Track for Computational Science CPS615 -- Fall Semester 96. by Geoffrey C. Fox, Tom Haupt

This example illustrates remapping from one to two dimensional decomposition for A and changing B from alignment with columns to alignment with rows

REAL, DIMENSION(64,64) :: A
REAL, DIMENSION(64) :: B

!HPF$ PROCESSORS P(64)

!HPF$ PROCESSORS Q(8,8)

!HPF$ DYNAMIC :: A,B

!HPF$ ALIGN B(:) WITH A(:,*)

!HPF$ DISTRIBUTE A(*,BLOCK)ONTO P

...

!HPF$ REALIGN B(:) WITH A(*,:)

...

!HPF$ REDISTRIBUTE A(CYCLIC,CYCLIC) ONTO Q

...