A skew schedule is a communication schedule for performing a skewed shift--a shift where the shift amount is itself an array--in a particular dimension of a distributed array placing the result in another array. The source and destination must have the same shape and same element-type, and they must have a certain alignment relation.
A skew schedule is described by a collective object with local components of class Skew. The public interface of the Skew class is
class DAD ;
enum Mode {CYCL, EDGE, NONE} ;
class Skew {
public :
Skew(const DAD* dst, const DAD* src, const int len,
const DAD* shf, int* shfDat, const int dim,
const Mode mode) ;
void execute(void* dstDat, void* srcDat) ;
private :
...
} ;