You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
3.0 KiB
FortranFixed
86 lines
3.0 KiB
FortranFixed
19 years ago
|
C
|
||
|
|
C Parallel Sparse BLAS v2.0
|
||
|
|
C (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
|
||
|
|
C Alfredo Buttari University of Rome Tor Vergata
|
||
|
|
C
|
||
|
|
C Redistribution and use in source and binary forms, with or without
|
||
|
|
C modification, are permitted provided that the following conditions
|
||
|
|
C are met:
|
||
|
|
C 1. Redistributions of source code must retain the above copyright
|
||
|
|
C notice, this list of conditions and the following disclaimer.
|
||
|
|
C 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
C notice, this list of conditions, and the following disclaimer in the
|
||
|
|
C documentation and/or other materials provided with the distribution.
|
||
|
|
C 3. The name of the PSBLAS group or the names of its contributors may
|
||
|
|
C not be used to endorse or promote products derived from this
|
||
|
|
C software without specific written permission.
|
||
|
|
C
|
||
|
|
C THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
C ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||
|
|
C TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||
|
|
C PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
|
||
|
|
C BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
C CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
C SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
C INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
C CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
C ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
C POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
C
|
||
|
|
C
|
||
|
20 years ago
|
C This routine compute only the casew with Unit diagonal ...
|
||
|
|
SUBROUTINE DJADSV(UNITD,NROW,NG,A,KA,IA,JA,X,Y,IERROR)
|
||
|
|
IMPLICIT REAL*8 (A-H,O-Z)
|
||
|
|
DIMENSION IA(3,*),JA(*),KA(*),A(*),X(*),Y(*)
|
||
|
|
CHARACTER UNITD
|
||
|
|
INTEGER IERROR
|
||
|
|
|
||
|
|
IERROR=0
|
||
|
|
|
||
|
|
IF (UNITD.EQ.'U') THEN
|
||
|
|
|
||
|
|
IF (NG.EQ.0) THEN
|
||
|
|
DO I = 1, NROW
|
||
|
|
Y(I) = X(I)
|
||
|
|
ENDDO
|
||
|
|
ENDIF
|
||
|
|
|
||
|
|
DO IPG=1,NG
|
||
|
|
DO I = IA(1,IPG),IA(1,IPG+1)-1
|
||
|
|
Y(I) = X(I)
|
||
|
|
END DO
|
||
|
|
*
|
||
|
|
* LOOP ON COLUMNS
|
||
|
|
* ---------------
|
||
|
|
*
|
||
|
|
IP2 = IA(2,IPG)
|
||
|
|
DO K = IP2, IA(3,IPG)-1
|
||
|
|
IPX = IA(1,IPG)
|
||
|
|
DO I = JA(K), JA(K+1)-1
|
||
|
|
Y(IPX) = Y(IPX) - A(I)*Y(KA(I))
|
||
|
|
IPX = IPX+1
|
||
|
|
ENDDO
|
||
|
|
ENDDO
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* LOOP ON ROWS
|
||
|
|
* ---------------
|
||
|
|
*
|
||
|
|
IPX = IA(1,IPG)
|
||
|
|
DO K = IA(3,IPG), IA(2,IPG+1)-1
|
||
|
|
DO I = JA(K), JA(K+1)-1
|
||
|
|
Y(IPX) = Y(IPX) - A(I)*Y(KA(I))
|
||
|
|
ENDDO
|
||
|
|
IPX = IPX + 1
|
||
|
|
ENDDO
|
||
|
|
|
||
|
|
****************************************
|
||
|
|
END DO !END LOOP ON IPG=1,NG
|
||
|
|
****************************************
|
||
|
|
ELSE
|
||
|
|
WRITE(0,*) 'ERROR in DJADSV'
|
||
|
|
ENDIF
|
||
|
|
RETURN
|
||
|
|
END
|
||
|
|
|