lsd_mkb/lsd_mkb_superlu/superlu_seq/dpanel_bmod.c File Reference

Performs numeric block updates. More...

#include <stdio.h>
#include <stdlib.h>
#include "slu_ddefs.h"

Include dependency graph for dpanel_bmod.c:

Functions
void	dlsolve (int, int, double *, double *)
	Solves a dense UNIT lower triangular system.
void	dmatvec (int, int, int, double *, double *, double *)
	Performs a dense matrix-vector multiply: Mxvec = Mxvec + M * vec.
void	dcheck_tempv ()
void	dpanel_bmod (const int m, const int w, const int jcol, const int nseg, double *dense, double *tempv, int *segrep, int *repfnz, GlobalLU_t *Glu, SuperLUStat_t *stat)

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Detailed Description

Performs numeric block updates.

 -- SuperLU routine (version 3.0) --
 Univ. of California Berkeley, Xerox Palo Alto Research Center,
 and Lawrence Berkeley National Lab.
 October 15, 2003

 Copyright (c) 1994 by Xerox Corporation.  All rights reserved.

 THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY
 EXPRESSED OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.

 Permission is hereby granted to use or copy this program for any
 purpose, provided the above notices are retained on all copies.
 Permission to modify the code and to distribute modified code is
 granted, provided the above notices are retained, and a notice that
 the code was modified is included with the above copyright notice.
 

---

Function Documentation

void dcheck_tempv

(

)

void dlsolve	(	int	ldm,
		int	ncol,
		double *	M,
		double *	rhs
	)

Solves a dense UNIT lower triangular system.

The unit lower triangular matrix is stored in a 2D array M(1:nrow,1:ncol). The solution will be returned in the rhs vector.

void dmatvec	(	int	ldm,
		int	nrow,
		int	ncol,
		double *	M,
		double *	vec,
		double *	Mxvec
	)

Performs a dense matrix-vector multiply: Mxvec = Mxvec + M * vec.

The input matrix is M(1:nrow,1:ncol); The product is returned in Mxvec[].

void dpanel_bmod	(	const int	m,
		const int	w,
		const int	jcol,
		const int	nseg,
		double *	dense,
		double *	tempv,
		int *	segrep,
		int *	repfnz,
		GlobalLU_t *	Glu,
		SuperLUStat_t *	stat
	)

 Purpose
 =======

    Performs numeric block updates (sup-panel) in topological order.
    It features: col-col, 2cols-col, 3cols-col, and sup-col updates.
    Special processing on the supernodal portion of L[*,j]

    Before entering this routine, the original nonzeros in the panel 
    were already copied into the spa[m,w].

    Updated/Output parameters-
    dense[0:m-1,w]: L[*,j:j+w-1] and U[*,j:j+w-1] are returned 
    collectively in the m-by-w vector dense[*]. 
 

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