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<TITLE>HPL_dlocmax HPL 2.0 Library Functions September 10, 2008</TITLE> |
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<BODY BGCOLOR="WHITE" TEXT = "#000000" LINK = "#0000ff" VLINK = "#000099" |
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ALINK = "#ffff00"> |
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<H1>Name</H1> |
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<B>HPL_dlocmax</B> finds the maximum entry in matrix column. |
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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_dlocmax(</CODE> |
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<CODE>HPL_T_panel *</CODE> |
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<CODE>PANEL</CODE>, |
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<CODE>const int</CODE> |
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<CODE>N</CODE>, |
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<CODE>const int</CODE> |
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<CODE>II</CODE>, |
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<CODE>const int</CODE> |
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<CODE>JJ</CODE>, |
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<CODE>double *</CODE> |
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<CODE>WORK</CODE> |
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<CODE>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_dlocmax</B> |
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finds the maximum entry in the current column and packs |
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the useful information in WORK[0:3]. On exit, WORK[0] contains the |
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local maximum absolute value scalar, WORK[1] is the corresponding |
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local row index, WORK[2] is the corresponding global row index, and |
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WORK[3] is the coordinate of the process owning this max. When N is |
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less than 1, the WORK[0:2] is initialized to zero, and WORK[3] is set |
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to the total number of process rows. |
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<H1>Arguments</H1> |
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<PRE>
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PANEL (local input/output) HPL_T_panel * |
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On entry, PANEL points to the data structure containing the |
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panel information. |
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</PRE>
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<PRE>
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N (local input) const int |
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On entry, N specifies the local number of rows of the column |
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of A on which we operate. |
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</PRE>
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<PRE>
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II (local input) const int |
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On entry, II specifies the row offset where the column to be |
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operated on starts with respect to the panel. |
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</PRE>
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<PRE>
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JJ (local input) const int |
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On entry, JJ specifies the column offset where the column to |
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be operated on starts with respect to the panel. |
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</PRE>
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<PRE>
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WORK (local workspace) double * |
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On entry, WORK is a workarray of size at least 4. On exit, |
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WORK[0] contains the local maximum absolute value scalar, |
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WORK[1] contains the corresponding local row index, WORK[2] |
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contains the corresponding global row index, and WORK[3] is |
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the coordinate of process owning this max. |
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</PRE>
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<H1>See Also</H1> |
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<A HREF="HPL_dlocswpN.html">HPL_dlocswpN</A>, |
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<A HREF="HPL_dlocswpT.html">HPL_dlocswpT</A>, |
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<A HREF="HPL_pdmxswp.html">HPL_pdmxswp</A>, |
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<A HREF="HPL_pdpancrN.html">HPL_pdpancrN</A>, |
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<A HREF="HPL_pdpancrT.html">HPL_pdpancrT</A>, |
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<A HREF="HPL_pdpanllN.html">HPL_pdpanllN</A>, |
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<A HREF="HPL_pdpanllT.html">HPL_pdpanllT</A>, |
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<A HREF="HPL_pdpanrlN.html">HPL_pdpanrlN</A>, |
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<A HREF="HPL_pdpanrlT.html">HPL_pdpanrlT</A>, |
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<A HREF="HPL_pdrpancrN.html">HPL_pdrpancrN</A>, |
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<A HREF="HPL_pdrpancrT.html">HPL_pdrpancrT</A>, |
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<A HREF="HPL_pdrpanllN.html">HPL_pdrpanllN</A>, |
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<A HREF="HPL_pdrpanllT.html">HPL_pdrpanllT</A>, |
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<A HREF="HPL_pdrpanrlN.html">HPL_pdrpanrlN</A>, |
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<A HREF="HPL_pdrpanrlT.html">HPL_pdrpanrlT</A>, |
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<A HREF="HPL_pdfact.html">HPL_pdfact</A>. |
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