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psblas3/base/serial/jad/djadrws.f

79 lines
3.0 KiB
FortranFixed

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
C ... Compute infinity norma for sparse matrix in CSR Format ...
SUBROUTINE DJADRWS(TRANS,M,N,NG,A,KA,JA,IA,
+ INFOA,ROWSUM,IERROR)
use psb_const_mod
IMPLICIT NONE
C .. Scalar Arguments ..
INTEGER M,N, IERROR, NG
CHARACTER TRANS
C .. Array Arguments ..
INTEGER KA(*),JA(*),IA(3,*),INFOA(*)
DOUBLE PRECISION A(*), rowsum(*)
C ... Local Scalars ..
DOUBLE PRECISION NRMI
INTEGER I, IR, K, IPG, NPG, IPX
NRMI = 0.0
IR = 0
DO IPG = 1, NG
K = IA(2,IPG)
NPG = JA(K+1)- JA(K)
C ... ...
DO I = 1, NPG
ROWSUM(IR+I) = 0.0
ENDDO
DO K = IA(2,IPG), IA(3,IPG)-1
IPX = 1
DO I = JA(K), JA(K+1) - 1
ROWSUM(IR+IPX) = ROWSUM(IR+IPX) + ABS(A(I))
IPX = IPX + 1
ENDDO
ENDDO
C ... CSR Representation ...
IPX = 1
DO K = IA(3,IPG), IA(2,IPG+1)-1
DO I = JA(K), JA(K+1) - 1
ROWSUM(IR+IPX) = ROWSUM(IR+IPX) + ABS(A(I))
ENDDO
IPX = IPX + 1
ENDDO
IR = IR + NPG
ENDDO
END