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145 lines
4.6 KiB
Fortran
145 lines
4.6 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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c
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c What if a wrong DESCRA is passed?
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c
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c
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*
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*
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SUBROUTINE DCSRMM(TRANSA,M,K,N,ALPHA,DESCRA,AR,
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* JA,IA,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
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C
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C
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C .. Scalar Arguments ..
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DOUBLE PRECISION ALPHA, BETA
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INTEGER K, LDB, LDC, M, N, LWORK,IERROR
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CHARACTER TRANSA
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C .. Array Arguments ..
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DOUBLE PRECISION AR(*), B(LDB,*), C(LDC,*), WORK(*)
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INTEGER IA(*), JA(*)
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CHARACTER DESCRA*11
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C .. Local Scalars ..
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INTEGER I, J, K4
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CHARACTER DIAG, TRANS
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c .. Local Arrays ..
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CHARACTER*20 NAME
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INTEGER INT_VAL(5)
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C .. External Subroutines ..
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EXTERNAL DCSRMV
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C .. Executable Statements ..
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C
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C
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NAME = 'DCSRMM\0'
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IERROR = 0
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CALL FCPSB_ERRACTIONSAVE(ERR_ACT)
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C
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IF (DESCRA(1:1).EQ.'G') TRANS = TRANSA
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IF (DESCRA(1:1).EQ.'S' .AND. DESCRA(2:2).EQ.'U') TRANS = 'U'
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IF (DESCRA(1:1).EQ.'S' .AND. DESCRA(2:2).EQ.'L') TRANS = 'L'
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c
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c Does DSRMV manage this case too?
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c
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IF (DESCRA(1:1).EQ.'D') THEN
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IF (DESCRA(3:3).EQ.'U') THEN
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DO 40 I = 1, K
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DO 20 J = 1, M
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C(J,I) = BETA*C(J,I) + ALPHA*B(J,I)
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20 CONTINUE
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40 CONTINUE
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ELSE
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DO 80 I = 1, K
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DO 60 J = 1, M
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C(J,I) = BETA*C(J,I) + ALPHA*AR(J)*B(J,I)
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60 CONTINUE
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80 CONTINUE
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END IF
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RETURN
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END IF
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C
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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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C
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C C = A*B OR C=A'*B
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C
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C
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NB = 4
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K4 = MOD(K,NB)
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SELECT CASE(K4)
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CASE(1)
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IF (K==1) THEN
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CALL DCSRMV(TRANS,DIAG,M,N,ALPHA,AR,JA,IA,B(1,1),
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+ BETA,C(1,1),WORK,LWORK,IERROR)
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ELSE
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CALL DCSRMV2(TRANS,DIAG,M,N,ALPHA,AR,JA,IA,
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+ B(1,1),LDB,BETA,C(1,1),LDC,WORK,LWORK,IERROR)
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CALL DCSRMV3(TRANS,DIAG,M,N,ALPHA,AR,JA,IA,
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+ B(1,3),LDB,BETA,C(1,3),LDC,WORK,LWORK,IERROR)
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K4 = K4 + 4
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ENDIF
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CASE(2)
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CALL DCSRMV2(TRANS,DIAG,M,N,ALPHA,AR,JA,IA,
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+ B(1,1),LDB,BETA,C(1,1),LDC,WORK,LWORK,IERROR)
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CASE(3)
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CALL DCSRMV3(TRANS,DIAG,M,N,ALPHA,AR,JA,IA,
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+ B(1,1),LDB,BETA,C(1,1),LDC,WORK,LWORK,IERROR)
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END SELECT
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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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DO I=K4+1,K,NB
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CALL DCSRMV4(TRANS,DIAG,M,N,ALPHA,AR,JA,IA,
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+ B(1,I),LDB,BETA,C(1,I),LDC,WORK,LWORK,IERROR)
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ENDDO
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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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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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