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HPL_infog2l(3)		     HPL Library Functions		HPL_infog2l(3)

NAME
       HPL_infog2l - global to local index translation.

SYNOPSIS
       #include	"hpl.h"

       void  HPL_infog2l( int I, int J,	const int IMB, const int MB, const int
       INB, const int NB, const	int RSRC, const	int  CSRC,  const  int	MYROW,
       const  int MYCOL, const int NPROW, const	int NPCOL, int * II, int * JJ,
       int * PROW, int * PCOL );

DESCRIPTION
       HPL_infog2l computes the	starting local index II, JJ  corresponding  to
       the  submatrix  starting	globally at the	entry pointed by  I,  J.  This
       routine returns the coordinates in the grid of the process  owning  the
       matrix entry of global indexes I, J, namely PROW	and PCOL.

ARGUMENTS
       I       (global input)	       int
	       On  entry,   I  specifies  the  global  row index of the	matrix
	       entry. I	must be	at least zero.

       J       (global input)	       int
	       On entry,  J  specifies the global column index of  the	matrix
	       entry. J	must be	at least zero.

       IMB     (global input)	       const int
	       On  entry,   IMB	 specifies  the	size of	the first row block of
	       the global matrix. IMB must be at least one.

       MB      (global input)	       const int
	       On entry,  MB specifies the blocking factor used	 to  partition
	       and   distribute	 the rows of the matrix	A.  MB	must be	larger
	       than one.

       INB     (global input)	       const int
	       On entry, INB specifies the size	of the first column  block  of
	       the global matrix. INB must be at least one.

       NB      (global input)	       const int
	       On  entry,   NB specifies the blocking factor used to partition
	       and distribute the columns of the matrix	A. NB must  be	larger
	       than one.

       RSRC    (global input)	       const int
	       On  entry,   RSRC  specifies  the row coordinate	of the process
	       that possesses the row  I.  RSRC	 must  be at least  zero   and
	       strictly	less than NPROW.

       CSRC    (global input)	       const int
	       On  entry,  CSRC	specifies the column coordinate	of the process
	       that possesses the column J. CSRC  must be at least  zero   and
	       strictly	less than NPCOL.

       MYROW   (local input)	       const int
	       On  entry,  MYROW  specifies my	row process  coordinate	in the
	       grid. MYROW is greater than or equal  to	zero  and   less  than
	       NPROW.

       MYCOL   (local input)	       const int
	       On  entry,  MYCOL specifies my column process coordinate	in the
	       grid. MYCOL is greater than or equal  to	zero  and   less  than
	       NPCOL.

       NPROW   (global input)	       const int
	       On  entry,   NPROW  specifies the number	of process rows	in the
	       grid. NPROW is at least one.

       NPCOL   (global input)	       const int
	       On entry,  NPCOL	 specifies  the	number of process  columns  in
	       the grid. NPCOL is at least one.

       II      (local output)	       int *
	       On  exit,  II  specifies	the  local  starting  row index	of the
	       submatrix. On exit, II is at least 0.

       JJ      (local output)	       int *
	       On exit,	JJ  specifies the local	starting column	index  of  the
	       submatrix. On exit, JJ is at least 0.

       PROW    (global output)	       int *
	       On  exit,  PROW is the row coordinate of	the process owning the
	       entry specified by the global index I.  PROW is at  least  zero
	       and less	than NPROW.

       PCOL    (global output)	       int *
	       On  exit,  PCOL	is the column coordinate of the	process	owning
	       the entry specified by the global index J.  PCOL	 is  at	 least
	       zero and	less than NPCOL.

SEE ALSO
       HPL_indxg2l (3),	  HPL_indxg2p (3),   HPL_indxl2g (3),  HPL_numroc (3),
       HPL_numrocI (3).

HPL 2.1			       October 26, 2012			HPL_infog2l(3)

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | SEE ALSO

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