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128 lines
4.2 KiB
Fortran
128 lines
4.2 KiB
Fortran
C
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C Parallel Sparse BLAS v2.0
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C (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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C Alfredo Buttari University of Rome Tor Vergata
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C
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C Redistribution and use in source and binary forms, with or without
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C modification, are permitted provided that the following conditions
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C are met:
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C 1. Redistributions of source code must retain the above copyright
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C notice, this list of conditions and the following disclaimer.
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C 2. Redistributions in binary form must reproduce the above copyright
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C notice, this list of conditions, and the following disclaimer in the
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C documentation and/or other materials provided with the distribution.
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C 3. The name of the PSBLAS group or the names of its contributors may
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C not be used to endorse or promote products derived from this
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C software without specific written permission.
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C
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C THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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C ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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C TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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C PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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C BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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C CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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C SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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C INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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C CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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C ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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C POSSIBILITY OF SUCH DAMAGE.
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C
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C
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SUBROUTINE DCSRSM(TRANST,M,N,UNITD,D,ALPHA,DESCRA,A,JA,IA,
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* B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
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DOUBLE PRECISION ALPHA, BETA
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INTEGER LDB, LDC, LWORK, M, N, IERROR
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CHARACTER UNITD, TRANST
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DOUBLE PRECISION A(*), B(LDB,*), C(LDC,*), D(*), WORK(*)
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INTEGER IA(*), JA(*)
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CHARACTER DESCRA*11
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INTEGER I, K
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CHARACTER DIAG, UPLO
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LOGICAL DEBUG
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PARAMETER (DEBUG=.FALSE.)
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C .. Local Arrays ..
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CHARACTER*20 NAME
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INTEGER INT_VAL(5), err_Act
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NAME = 'DCSRSM\0'
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IERROR = 0
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CALL FCPSB_ERRACTIONSAVE(ERR_ACT)
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int_Val(1)=0
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UPLO = '?'
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IF (DESCRA(1:1).EQ.'T' .AND. DESCRA(2:2).EQ.'U') UPLO = 'U'
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IF (DESCRA(1:1).EQ.'T' .AND. DESCRA(2:2).EQ.'L') UPLO = 'L'
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IF (UPLO.EQ.'?') THEN
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int_val(1) = 7
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IERROR=5
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CALL FCPSB_ERRPUSH(IERROR,NAME,INT_VAL)
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GOTO 9999
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END IF
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IF (DESCRA(3:3).EQ.'N') DIAG = 'N'
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IF (DESCRA(3:3).EQ.'U') DIAG = 'U'
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IF(UNITD.EQ.'B') THEN
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IERROR=5
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int_val(1) = 4
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CALL FCPSB_ERRPUSH(IERROR,NAME,INT_VAL)
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GOTO 9999
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ENDIF
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IF (UNITD.EQ.'R') THEN
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DO 40 I = 1, N
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DO 20 K = 1, M
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B(K,I) = B(K,I)*D(K)
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20 CONTINUE
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40 CONTINUE
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END IF
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if ((alpha.ne.1.d0) .or.(beta .ne.0.0d0)) then
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if (lwork .lt. m) then
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int_val(1) = 17
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IERROR=5
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CALL FCPSB_ERRPUSH(IERROR,NAME,INT_VAL)
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GOTO 9999
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END IF
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DO I = 1, N
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CALL DCSRSV(UPLO,TRANST,DIAG,M,A,JA,IA,B(1,I),work)
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do k=1,m
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c(k,i) = beta*c(k,i) + alpha*work(k)
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enddo
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enddo
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else
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DO 60 I = 1, N
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CALL DCSRSV(UPLO,TRANST,DIAG,M,A,JA,IA,B(1,I),C(1,I))
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60 CONTINUE
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endif
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IF(IERROR.NE.0) THEN
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INT_VAL(1)=IERROR
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CALL FCPSB_ERRPUSH(4012,NAME,INT_VAL)
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GOTO 9999
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END IF
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if (debug) then
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write(0,*) 'Check from DCSRSM'
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do k=1,m
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write(0,*) k, b(k,1),c(k,1)
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enddo
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endif
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IF (UNITD.EQ.'L') THEN
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DO 45 I = 1, N
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DO 25 K = 1, M
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C(K,I) = C(K,I)*D(K)
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25 CONTINUE
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45 CONTINUE
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END IF
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CALL FCPSB_ERRACTIONRESTORE(ERR_ACT)
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RETURN
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9999 CONTINUE
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CALL FCPSB_ERRACTIONRESTORE(ERR_ACT)
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IF ( ERR_ACT .NE. 0 ) THEN
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CALL FCPSB_SERROR()
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RETURN
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ENDIF
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RETURN
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END
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