pdgsmv_AXglobal.c File Reference

Performs sparse matrix-vector multiplication. More...

#include <math.h>
#include "superlu_ddefs.h"

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Functions
static void	dcreate_msr_matrix (SuperMatrix *, int_t[], int_t, double **, int_t **)
static void	dPrintMSRmatrix (int, double[], int_t[], gridinfo_t *)
int	pdgsmv_AXglobal_setup (SuperMatrix *A, Glu_persist_t *Glu_persist, gridinfo_t *grid, int_t *m, int_t *update[], double *val[], int_t *bindx[], int_t *mv_sup_to_proc)
int	pdgsmv_AXglobal (int_t m, int_t update[], double val[], int_t bindx[], double X[], double ax[])
int	pdgsmv_AXglobal_abs (int_t m, int_t update[], double val[], int_t bindx[], double X[], double ax[])

Detailed Description

Performs sparse matrix-vector multiplication.

Copyright (c) 2003, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from U.S. Dept. of Energy)

All rights reserved.

The source code is distributed under BSD license, see the file License.txt at the top-level directory.

-- Distributed SuperLU routine (version 1.0) --
Lawrence Berkeley National Lab, Univ. of California Berkeley.
September 1, 1999

Function Documentation

dcreate_msr_matrix()

static void dcreate_msr_matrix ( SuperMatrix *  A, int_t  update[], int_t  N_update, double **  val, int_t **  bindx  )

static

Create the distributed modified sparse row (MSR) matrix: bindx/val.
For a submatrix of size m-by-n, the MSR arrays are as follows:
   bindx[0]      = m + 1
   bindx[0..m]   = pointer to start of each row
   bindx[ks..ke] = column indices of the off-diagonal nonzeros in row k,
                   where, ks = bindx[k], ke = bindx[k+1]-1
   val[k]        = A(k,k), k < m, diagonal elements
   val[m]        = not used
   val[ki]       = A(k, bindx[ki]), where ks <= ki <= ke
Both arrays are of length nnz + 1.

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dPrintMSRmatrix()

static void dPrintMSRmatrix ( int  m, double  val[], int_t  bindx[], gridinfo_t *  grid  )

static

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pdgsmv_AXglobal()

int pdgsmv_AXglobal	(	int_t	m,
		int_t	update[],
		double	val[],
		int_t	bindx[],
		double	X[],
		double	ax[]
	)

Performs sparse matrix-vector multiplication.

val/bindx stores the distributed MSR matrix A
X is global
ax product is distributed the same way as A

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pdgsmv_AXglobal_abs()

int pdgsmv_AXglobal_abs	(	int_t	m,
		int_t	update[],
		double	val[],
		int_t	bindx[],
		double	X[],
		double	ax[]
	)

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pdgsmv_AXglobal_setup()

int pdgsmv_AXglobal_setup	(	SuperMatrix *	A,
		Glu_persist_t *	Glu_persist,
		gridinfo_t *	grid,
		int_t *	m,
		int_t *	update[],
		double *	val[],
		int_t *	bindx[],
		int_t *	mv_sup_to_proc
	)

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