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psblas3/base/serial/f77/dswmm.f

212 lines
7.6 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 SUBROUTINE DSWMM(TRANS,M,N,K,ALPHA,FIDA,DESCRA,A,IA1,IA2,
C INFOA,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
C Purpose
C =======
C
C Computing C <-- ALPHA A B + BETA C or
C C <-- ALPHA At B + BETA C
C Called by DCSMM
C Actual computing performed by sparse Toolkit kernels.
C This routine selects the proper kernel for each
C data structure.
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 K - INTEGER
C On entry: number of columns of matrix A (A') and
C number of rows of matrix B
C Unchanged on exit.
C
C ALPHA - DOUBLE PRECISION
C On entry: multiplicative constant.
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 B - DOUBLE PRECISION matrix of dimension (LDB,*)
C On entry: dense matrix.
C Unchanged on exit.
C
C LDB - INTEGER
C On entry: leading dimension of B
C Unchanged on exit.
C
C BETA - DOUBLE PRECISION
C On entry: multiplicative constant.
C Unchanged on exit.
C
C C - DOUBLE PRECISION matrix of dimension (LDC,*)
C On entry: dense matrix.
C On exit is updated with the matrix-matrix product.
C
C LDC - INTEGER
C On entry: leading dimension of C
C Unchanged on exit.
C
C WORK - DOUBLE PRECISION array of dimension (LWORK)
C On entry: work area.
C On exit INT(WORK(1)) contains the minimum value
C for LWORK satisfying DSWMM memory requirements.
C
C LWORK - INTEGER
C On entry LWORK specifies the dimension of WORK
C Unchanged 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 Note
C ====
C All checks on argument are performed in the calling routine.
C
C
SUBROUTINE DSWMM(TRANS,M,N,K,ALPHA,FIDA,DESCRA,A,IA1,IA2, &
& INFOA,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
use psb_const_mod
C .. Scalar Arguments ..
INTEGER M,N,K,LDB,LDC,LWORK,IERROR
CHARACTER TRANS
real(psb_dpk_) ALPHA,BETA
C .. Array Arguments ..
INTEGER IA1(*),IA2(*),INFOA(*), INT_VAL(5)
CHARACTER DESCRA*11, FIDA*5
real(psb_dpk_) A(*),B(LDB,*),C(LDC,*),WORK(*)
C .. External Subroutines ..
EXTERNAL DCSRMM
CHARACTER*20 NAME
C .. Executable Statements ..
C
NAME = 'DSWMM\0'
IERROR = 0
CALL FCPSB_ERRACTIONSAVE(ERR_ACT)
C Switching on FIDA: proper sparse BLAS routine is selected
C according to data structure
C
IF (FIDA(1:3).EQ.'CSR') THEN
C
C A, IA1, IA2 ---> AR, JA, IA
C VAL, INDX, PNTR
C INFOA(*) not used
CALL DCSRMM(TRANS,M,N,K,ALPHA,DESCRA,A,IA1,
+ IA2,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
ELSE IF (FIDA(1:3).EQ.'JAD') THEN
C
C INFOA(*) not used
C
CALL DJADMM(TRANS,M,N,K,ALPHA,DESCRA,A,IA1,
+ IA2,B,LDB,BETA,C,LDC,WORK,IERROR)
ELSE IF (FIDA(1:3).EQ.'COO') THEN
C
C
CALL DCOOMM(TRANS,M,N,K,ALPHA,DESCRA,A,IA1,
+ IA2,INFOA,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
ELSE
C
C This data structure not yet considered
C
IERROR = 3010
CALL FCPSB_ERRPUSH(IERROR,NAME,INT_VAL)
GOTO 9999
END IF
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