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<TITLE>HPL_infog2l HPL 2.0 Library Functions September 10, 2008</TITLE> |
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ALINK = "#ffff00"> |
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<H1>Name</H1> |
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<B>HPL_infog2l</B> global to local index translation. |
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<H1>Synopsis</H1> |
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<CODE>#include "hpl.h"</CODE><BR><BR> |
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<CODE>void</CODE> |
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<CODE>HPL_infog2l(</CODE> |
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<CODE>int</CODE> |
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<CODE>I</CODE>, |
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<CODE>int</CODE> |
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<CODE>J</CODE>, |
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<CODE>const int</CODE> |
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<CODE>IMB</CODE>, |
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<CODE>const int</CODE> |
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<CODE>MB</CODE>, |
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<CODE>const int</CODE> |
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<CODE>INB</CODE>, |
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<CODE>const int</CODE> |
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<CODE>NB</CODE>, |
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<CODE>const int</CODE> |
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<CODE>RSRC</CODE>, |
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<CODE>const int</CODE> |
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<CODE>CSRC</CODE>, |
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<CODE>const int</CODE> |
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<CODE>MYROW</CODE>, |
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<CODE>const int</CODE> |
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<CODE>MYCOL</CODE>, |
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<CODE>const int</CODE> |
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<CODE>NPROW</CODE>, |
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<CODE>const int</CODE> |
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<CODE>NPCOL</CODE>, |
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<CODE>int *</CODE> |
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<CODE>II</CODE>, |
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<CODE>int *</CODE> |
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<CODE>JJ</CODE>, |
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<CODE>int *</CODE> |
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<CODE>PROW</CODE>, |
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<CODE>int *</CODE> |
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<CODE>PCOL</CODE> |
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<CODE>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_infog2l</B> |
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computes the starting local index II, JJ corresponding to |
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the submatrix starting globally at the entry pointed by I, J. This |
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routine returns the coordinates in the grid of the process owning the |
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matrix entry of global indexes I, J, namely PROW and PCOL. |
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<H1>Arguments</H1> |
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<PRE>
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I (global input) int |
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On entry, I specifies the global row index of the matrix |
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entry. I must be at least zero. |
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</PRE>
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<PRE>
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J (global input) int |
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On entry, J specifies the global column index of the matrix |
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entry. J must be at least zero. |
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</PRE>
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<PRE>
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IMB (global input) const int |
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On entry, IMB specifies the size of the first row block of |
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the global matrix. IMB must be at least one. |
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</PRE>
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<PRE>
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MB (global input) const int |
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On entry, MB specifies the blocking factor used to partition |
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and distribute the rows of the matrix A. MB must be larger |
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than one. |
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</PRE>
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<PRE>
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INB (global input) const int |
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On entry, INB specifies the size of the first column block of |
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the global matrix. INB must be at least one. |
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</PRE>
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<PRE>
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NB (global input) const int |
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On entry, NB specifies the blocking factor used to partition |
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and distribute the columns of the matrix A. NB must be larger |
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than one. |
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</PRE>
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<PRE>
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RSRC (global input) const int |
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On entry, RSRC specifies the row coordinate of the process |
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that possesses the row I. RSRC must be at least zero and |
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strictly less than NPROW. |
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</PRE>
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<PRE>
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CSRC (global input) const int |
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On entry, CSRC specifies the column coordinate of the process |
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that possesses the column J. CSRC must be at least zero and |
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strictly less than NPCOL. |
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</PRE>
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<PRE>
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MYROW (local input) const int |
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On entry, MYROW specifies my row process coordinate in the |
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grid. MYROW is greater than or equal to zero and less than |
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NPROW. |
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</PRE>
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<PRE>
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MYCOL (local input) const int |
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On entry, MYCOL specifies my column process coordinate in the |
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grid. MYCOL is greater than or equal to zero and less than |
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NPCOL. |
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</PRE>
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<PRE>
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NPROW (global input) const int |
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On entry, NPROW specifies the number of process rows in the |
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grid. NPROW is at least one. |
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</PRE>
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<PRE>
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NPCOL (global input) const int |
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On entry, NPCOL specifies the number of process columns in |
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the grid. NPCOL is at least one. |
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</PRE>
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<PRE>
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II (local output) int * |
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On exit, II specifies the local starting row index of the |
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submatrix. On exit, II is at least 0. |
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</PRE>
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<PRE>
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JJ (local output) int * |
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On exit, JJ specifies the local starting column index of the |
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submatrix. On exit, JJ is at least 0. |
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</PRE>
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<PRE>
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PROW (global output) int * |
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On exit, PROW is the row coordinate of the process owning the |
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entry specified by the global index I. PROW is at least zero |
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and less than NPROW. |
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</PRE>
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<PRE>
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PCOL (global output) int * |
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On exit, PCOL is the column coordinate of the process owning |
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the entry specified by the global index J. PCOL is at least |
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zero and less than NPCOL. |
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</PRE>
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<H1>See Also</H1> |
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<A HREF="HPL_indxg2l.html">HPL_indxg2l</A>, |
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<A HREF="HPL_indxg2p.html">HPL_indxg2p</A>, |
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<A HREF="HPL_indxl2g.html">HPL_indxl2g</A>, |
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<A HREF="HPL_numroc.html">HPL_numroc</A>, |
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<A HREF="HPL_numrocI.html">HPL_numrocI</A>. |
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