A shift schedule is a communication schedule for shifting the elements of a distributed array along one of its dimensions, placing the result in another array. The source and destination have the same shape and same element-type, and they must have a certain alignment relation.
A shift schedule is described by a collective object with local components of class Shift. The public interface of the Shift class is
class DAD ;
enum Mode {CYCL, EDGE, NONE} ;
class Shift {
public :
Shift(const DAD* dst, const DAD* src, const int len,
const int shift, const int dim, const Mode mode) ;
void execute(void* dstDat, void* srcDat) ;
private :
...
} ;