NAME

HPL_indxg2l - Map a global index into a local one.

SYNOPSIS

#include "hpl.h"

int HPL_indxg2l( const int IG, const int INB, const int NB, const int SRCPROC, const int NPROCS );

HPL_indxg2l computes the local index of a matrix entry pointed to by the global index IG. This local returned index is the same in all processes.

IG (input) const int: On entry, IG specifies the global index of the matrix entry. IG must be at least zero.
INB (input) const int: On entry, INB specifies the size of the first block of the global matrix. INB must be at least one.
NB (input) const int: On entry, NB specifies the blocking factor used to partition and distribute the matrix. NB must be larger than one.
SRCPROC (input) const int: On entry, if SRCPROC = -1, the data is not distributed but replicated, in which case this routine returns IG in all processes. Otherwise, the value of SRCPROC is ignored.
NPROCS (input) const int: On entry, NPROCS specifies the total number of process rows or columns over which the matrix is distributed. NPROCS must be at least one.