You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
244 lines
8.6 KiB
Fortran
244 lines
8.6 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 DSWSM(TRANS,M,N,ALPHA,UNITD,D,FIDT,DESCRT,T,IT1,IT2,
|
|
C INFOT,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
|
|
C
|
|
C Purpose
|
|
C =======
|
|
C
|
|
C Solving triangular systems of equations with multiple right-hand sides
|
|
C C <-- ALPHA D T-1 B + BETA C or
|
|
C C <-- ALPHA D T-t B + BETA C or
|
|
C C <-- ALPHA T-1 D B + BETA C or
|
|
C C <-- ALPHA T-t D B + BETA C
|
|
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 whether the routine operates with
|
|
C matrix T or with the transpose of T as follows:
|
|
C TRANS = 'N' -> use matrix T
|
|
C TRANS = 'T' or 'C' -> use T' (transpose of matrix T)
|
|
C Unchanged on exit.
|
|
C
|
|
C M - INTEGER
|
|
C On entry: number of rows and columns of matrix T
|
|
C and number of rows of matrices B and C.
|
|
C Unchanged on exit.
|
|
C
|
|
C N - INTEGER
|
|
C On entry: number of columns of matrices B and C
|
|
C (number of right-hand sides).
|
|
C Unchanged on exit.
|
|
C
|
|
C ALPHA - DOUBLE PRECISION
|
|
C On entry: multiplicative constant.
|
|
C Unchanged on exit.
|
|
C
|
|
C UNITD - CHARACTER*1
|
|
C On entry UNITD specifies whether the diagonal matrix is unit
|
|
C or whether row or column scaling has to be performed, as follows:
|
|
C UNITD = 'U' -> unit matrix (no scaling)
|
|
C UNITD = 'L' -> scale on the left (row scaling)
|
|
C UNITD = 'R' -> scale on the right (column scaling)
|
|
C UNITD = 'B' -> scale on the right and on the left
|
|
C with D^1/2
|
|
C Unchanged on exit.
|
|
C
|
|
C D - DOUBLE PRECISION array of dimension (M)
|
|
C On entry D specifies the main diagonal of the matrix used
|
|
C for scaling.
|
|
C Unchanged on exit.
|
|
C
|
|
C FIDT - CHARACTER*5
|
|
C On entry FIDT defines the format of the input sparse matrix.
|
|
C Unchanged on exit.
|
|
C
|
|
C DESCRT - CHARACTER*1 array of DIMENSION (9)
|
|
C On entry DESCRT describes the characteristics of the input
|
|
C sparse matrix.
|
|
C Unchanged on exit.
|
|
C
|
|
C
|
|
C T - DOUBLE PRECISION array of DIMENSION (*)
|
|
C On entry T specifies the values of the input sparse
|
|
C matrix.
|
|
C Unchanged on exit.
|
|
C
|
|
C IT1 - INTEGER array of dimension (*)
|
|
C On entry IT1 holds integer information on input sparse
|
|
C matrix. Actual information will depend on data format used.
|
|
C Unchanged on exit.
|
|
C
|
|
C IT2 - INTEGER array of dimension (*)
|
|
C On entry IT2 holds integer information on input sparse
|
|
C matrix. Actual information will depend on data format used.
|
|
C Unchanged on exit.
|
|
C
|
|
C INFOT - INTEGER array of dimension (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 array of dimension (LDB,*)
|
|
C On entry: matrix of right-hand sides
|
|
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 array of dimension (LDC,*)
|
|
C On exit: solutions of triangular systems
|
|
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 DSWSM 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 SSWSM(TRANS,M,N,ALPHA,UNITD,D,FIDT,DESCRT,T,IT1,IT2,
|
|
& INFOT,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
|
|
use psb_const_mod
|
|
use psb_error_mod
|
|
use psb_string_mod
|
|
implicit none
|
|
C .. Scalar Arguments ..
|
|
INTEGER M, N, LDB, LDC, LWORK, IERROR
|
|
CHARACTER UNITD, TRANS
|
|
real(psb_dpk_) ALPHA, BETA
|
|
C .. Array Arguments ..
|
|
INTEGER IT1(*), IT2(*), INFOT(*)
|
|
CHARACTER DESCRT*11, FIDT*5
|
|
real(psb_dpk_) T(*), B(LDB,*), C(LDC,*), D(*), WORK(*)
|
|
C .. Local Scalars ..
|
|
INTEGER ONE
|
|
C .. Parameters ..
|
|
PARAMETER (ONE=1)
|
|
C .. External Subroutines ..
|
|
EXTERNAL DCSRSM, DCOPY
|
|
integer debug_level, debug_unit, err_act, int_val(5)
|
|
CHARACTER*20 NAME
|
|
|
|
C .. Executable Statements ..
|
|
|
|
NAME = 'DSWSM'
|
|
IERROR = 0
|
|
CALL FCPSB_ERRACTIONSAVE(ERR_ACT)
|
|
work(1) = szero
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
|
|
C
|
|
C Check for identity matrix
|
|
C
|
|
IF(psb_toupper(DESCRT(1:1)).EQ.'D' .AND.
|
|
+ psb_toupper(DESCRT(3:3)).EQ.'U') THEN
|
|
CALL SCOPY(M,B,ONE,C,ONE)
|
|
GOTO 9998
|
|
ENDIF
|
|
|
|
if (debug_level >= psb_debug_serial_comp_)
|
|
+ write(debug_unit,*) trim(name),': entry ',m,n,ierror,' ',unitd
|
|
C
|
|
C Switching on FIDT: proper sparse BLAS routine is selected
|
|
C according to data structure
|
|
C
|
|
IF (psb_toupper(FIDT(1:3)).EQ.'CSR') THEN
|
|
C
|
|
C T, IT1, IT2 ---> AR, JA, IA
|
|
C VAL, INDX, PNTR
|
|
C INFOT(*) not used
|
|
C
|
|
CALL SCSRSM(TRANS,M,N,UNITD,D,ALPHA,DESCRT,T,IT1,
|
|
& IT2,B,LDB,BETA,C,LDC,WORK,LWORK,IERROR)
|
|
ELSE IF (psb_toupper(FIDT(1:3)).EQ.'JAD') THEN
|
|
|
|
CALL SJADSM(TRANS,M,N,D,UNITD,0,ALPHA,DESCRT,T,IT1,IT2,
|
|
+ 0,B,LDB,BETA,C,LDC,WORK)
|
|
|
|
ELSE IF (psb_toupper(FIDT(1:3)).EQ.'COO') THEN
|
|
|
|
CALL SCOOSM(TRANS,M,N,UNITD,D,ALPHA,DESCRT,T,IT1,IT2,INFOT,
|
|
+ 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
|
|
|
|
9998 CONTINUE
|
|
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
|