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psblas3/base/serial/coo/dcoomm.f

99 lines
3.4 KiB
Fortran

C
C Parallel Sparse BLAS version 2.2
C (C) Copyright 2006/2007/2008
C 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
c What if a wrong DESCRA is passed?
c
c
*
*
SUBROUTINE DCOOMM(TRANSA,M,K,N,ALPHA,DESCRA,AR,
* IA,JA,INFOA,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
use psb_const_mod
C
C
C .. Scalar Arguments ..
real(psb_dpk_) ALPHA, BETA
INTEGER K, LDB, LDC, M, N, LWORK, IERROR
CHARACTER TRANSA
C .. Array Arguments ..
real(psb_dpk_) AR(*), B(LDB,*), C(LDC,*), WORK(*)
INTEGER IA(*), JA(*),INFOA(*)
CHARACTER DESCRA*11
C .. Local Scalars ..
INTEGER I, J
CHARACTER DIAG, TRANS
C .. External Subroutines ..
EXTERNAL DCOOMV
C .. Executable Statements ..
C
C
C
IERROR=0
IF (DESCRA(1:1).EQ.'G') TRANS = TRANSA
IF (DESCRA(1:1).EQ.'S' .AND. DESCRA(2:2).EQ.'U') TRANS = 'U'
IF (DESCRA(1:1).EQ.'S' .AND. DESCRA(2:2).EQ.'L') TRANS = 'L'
c
c Does DSRMV manage this case too? <????????????????????????????
c
IF (DESCRA(1:1).EQ.'D') THEN
IF (DESCRA(3:3).EQ.'U') THEN
DO 40 I = 1, K
DO 20 J = 1, M
C(J,I) = BETA*C(J,I) + ALPHA*B(J,I)
20 CONTINUE
40 CONTINUE
ELSE
DO 80 I = 1, K
DO 60 J = 1, M
C(J,I) = BETA*C(J,I) + ALPHA*AR(J)*B(J,I)
60 CONTINUE
80 CONTINUE
END IF
RETURN
END IF
C
IF (DESCRA(3:3).EQ.'N') DIAG = 'N'
IF (DESCRA(3:3).EQ.'U') DIAG = 'U'
C
C C = A*B OR C=A'*B
C
C
DO 100 I = 1, K
CALL DCOOMV(TRANS,DIAG,M,N,ALPHA,AR,IA,JA,INFOA,
+ B(1,I),BETA,C(1,I),WORK,IERROR)
100 CONTINUE
RETURN
END