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psblas3/base/serial/f77/dcsrws.f

184 lines
6.4 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 SUBROUTINE DCSRS(TRANS,M,N,FIDA,DESCRA,A,IA1,IA2, &
C & INFOA,ROWSUM,IERROR)
C Purpose
C =======
C
C Computing sum of absolute values for rows of distributed matrix
C ROWSUM(IX) = ASUM(A(IX, 1..N))
C IX = 1..M
C
C Parameters
C ==========
C
C TRANS - CHARACTER*1
C On entry TRANS specifies if the routine operates with matrix A
C or with the transpose of A as follows:
C TRANS = 'N' -> use matrix A
C TRANS = 'T' or 'C' -> use A' (transpose of matrix A)
C Unchanged on exit.
C
C M - INTEGER
C On entry: number of rows of matrix A (A') and
C number of rows of matrix C
C Unchanged on exit.
C
C N - INTEGER
C On entry: number of columns of matrix B
C and number of columns of matrix C.
C Unchanged on exit.
C
C FIDA - CHARACTER*5
C On entry FIDA defines the format of the input sparse matrix.
C Unchanged on exit.
C
C DESCRA - CHARACTER*1 array of DIMENSION (9)
C On entry DESCRA describes the characteristics of the input
C sparse matrix.
C Unchanged on exit.
C
C A - DOUBLE PRECISION array of DIMENSION (*)
C On entry A specifies the values of the input sparse
C matrix.
C Unchanged on exit.
C
C IA1 - INTEGER array of dimension (*)
C On entry IA1 holds integer information on input sparse
C matrix. Actual information will depend on data format used.
C Unchanged on exit.
C
C IA2 - INTEGER array of dimension (*)
C On entry IA2 holds integer information on input sparse
C matrix. Actual information will depend on data format used.
C Unchanged on exit.
C
C INFOA - INTEGER array of length 10.
C On entry can hold auxiliary information on input matrices
C formats or environment of subsequent calls.
C Might be changed on exit.
C
C IERROR - INTEGER
C On exit IERROR contains the value of error flag as follows:
C IERROR = 0 no error
C IERROR > 0 warning
C IERROR < 0 fatal error
C
C ROWSUM - DOUBLE PRECISION array of dimension (*)
C On exit this vector contains the sum of absolute values
C of elements of a row (AMAX of row array).
C It is required that it has dimension:
C ROWSUM(M) if the subroutine in called with the 'N' option
C ROWSUM(N) in other cases ('T' or 'C' options).
C
SUBROUTINE DCSRWS(TRANS,M,N,FIDA,DESCRA,A,IA1,IA2,
& INFOA,ROWSUM,IERROR)
IMPLICIT NONE
C .. Scalar Arguments ..
INTEGER M,N, IERROR
CHARACTER TRANS
C .. Array Arguments ..
INTEGER IA1(*),IA2(*),INFOA(*)
CHARACTER DESCRA*11, FIDA*5
DOUBLE PRECISION A(*), ROWSUM(*)
C .. Local Array..
INTEGER INT_VAL(5), ERR_ACT
DOUBLE PRECISION REAL_VAL(5)
CHARACTER*30 NAME,STRINGS(2)
C .. Parameters ..
DOUBLE PRECISION ZERO
INTEGER IONE
PARAMETER (ZERO=0.D0,IONE=1)
C .. Intrinsic Functions ..
INTRINSIC DBLE, IDINT
C .. Executable Statements ..
C
C Check for argument errors
C
IERROR = 0
NAME = 'DCSRWS\0'
IF (M.LT.0) THEN
IERROR = 10
INT_VAL(1) = 2
INT_VAL(2) = M
ELSE IF (N.LT.0) THEN
IERROR = 10
INT_VAL(1) = 3
INT_VAL(2) = N
ELSE IF (TRANS.NE.'T' .AND. TRANS.NE.'N' .AND. TRANS.NE.'C') THEN
IERROR = 40
INT_VAL(1) = 1
STRINGS(1) = TRANS//'\0'
ENDIF
C
C Error handling
C
IF(IERROR.NE.0) THEN
CALL FCPSB_ERRPUSH(IERROR,NAME,INT_VAL)
GOTO 9999
ENDIF
IF(M.LE.0 .OR. N.LE.0) THEN
GOTO 9999
ENDIF
IF (FIDA(1:3).EQ.'CSR') THEN
CALL DCSRRWS(TRANS,M,N,DESCRA,A,IA1,IA2,
+ INFOA,ROWSUM,IERROR)
ELSE IF (FIDA(1:3).EQ.'COO') THEN
CALL DCOORWS(TRANS,M,N,DESCRA,A,IA1,IA2,
+ INFOA,ROWSUM,IERROR)
ELSE IF (FIDA(1:3).EQ.'JAD') THEN
CALL DJDRWS(TRANS,M,N,DESCRA,A,IA1,IA2,
+ INFOA,ROWSUM,IERROR)
ELSE
C
C This data structure not yet considered
C
IERROR = 3010
strings(1) = fida//'\0'
ENDIF
CALL FCPSB_ERRACTIONRESTORE(ERR_ACT)
RETURN
9999 CONTINUE
CALL FCPSB_ERRACTIONRESTORE(ERR_ACT)
IF ( ERR_ACT .NE. 0 ) THEN
CALL FCPSB_SERROR()
RETURN
ENDIF
RETURN
END