SRC/dcolumn_bmod.c File Reference

performs numeric block updates More...

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

Functions
void	dusolve (int, int, double *, double *)
	Solves a dense upper triangular system.
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.
int	dcolumn_bmod (const int jcol, const int nseg, double *dense, double *tempv, int *segrep, int *repfnz, int fpanelc, GlobalLU_t *Glu, SuperLUStat_t *stat)

---

Detailed Description

 -- 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

int dcolumn_bmod	(	const int	jcol,
		const int	nseg,
		double *	dense,
		double *	tempv,
		int *	segrep,
		int *	repfnz,
		int	fpanelc,
		GlobalLU_t *	Glu,
		SuperLUStat_t *	stat
	)

 Purpose:
 ========
 Performs numeric block updates (sup-col) in topological order.
 It features: col-col, 2cols-col, 3cols-col, and sup-col updates.
 Special processing on the supernodal portion of L[*,j]
 Return value:   0 - successful return
               > 0 - number of bytes allocated when run out of space
 

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

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
	)

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

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

The upper triangular matrix is stored in a 2-dim array M(1:ldm,1:ncol). The solution will be returned in the rhs vector.