HPL_indxl2g HPL 2.2 Library Functions February 24, 2016

Name

HPL_indxl2g Map a index-process pair into a global index.

Synopsis

#include "hpl.h"

int HPL_indxl2g( const int IL, const int INB, const int NB, const int PROC, const int SRCPROC, const int NPROCS );

Description

HPL_indxl2g computes the global index of a matrix entry pointed to by the local index IL of the process indicated by PROC.

Arguments

IL      (input)                       const int
        On entry, IL specifies the local  index of the matrix  entry.
        IL 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 A. NB must be larger than one.
PROC    (input)                       const int
        On entry, PROC  specifies the coordinate of the process whose
        local array row or column is to be determined. PROC  must  be
        at least zero and strictly less than NPROCS.
SRCPROC (input)                       const int
        On entry,  SRCPROC  specifies  the coordinate of the  process
        that possesses the first row or column of the matrix. SRCPROC
        must be at least zero and strictly less than NPROCS.
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.

See Also

HPL_indxg2l, HPL_indxg2lp, HPL_indxg2p, HPL_numroc, HPL_numrocI.