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.
156 lines
5.0 KiB
Fortran
156 lines
5.0 KiB
Fortran
!!$
|
|
!!$ Parallel Sparse BLAS v2.0
|
|
!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari University of Rome Tor Vergata
|
|
!!$
|
|
!!$ Redistribution and use in source and binary forms, with or without
|
|
!!$ modification, are permitted provided that the following conditions
|
|
!!$ are met:
|
|
!!$ 1. Redistributions of source code must retain the above copyright
|
|
!!$ notice, this list of conditions and the following disclaimer.
|
|
!!$ 2. Redistributions in binary form must reproduce the above copyright
|
|
!!$ notice, this list of conditions, and the following disclaimer in the
|
|
!!$ documentation and/or other materials provided with the distribution.
|
|
!!$ 3. The name of the PSBLAS group or the names of its contributors may
|
|
!!$ not be used to endorse or promote products derived from this
|
|
!!$ software without specific written permission.
|
|
!!$
|
|
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
|
|
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
!!$ POSSIBILITY OF SUCH DAMAGE.
|
|
!!$
|
|
!!$
|
|
subroutine psb_dbjac_aply(alpha,prec,x,beta,y,desc_data,trans,work,info)
|
|
!
|
|
! Compute Y <- beta*Y + alpha*K^-1 X
|
|
! where K is a a Block Jacobi preconditioner stored in prec
|
|
! Note that desc_data may or may not be the same as prec%desc_data,
|
|
! but since both are INTENT(IN) this should be legal.
|
|
!
|
|
|
|
use psb_base_mod
|
|
use psb_prec_mod, psb_protect_name => psb_dbjac_aply
|
|
implicit none
|
|
|
|
type(psb_desc_type), intent(in) :: desc_data
|
|
type(psb_dprec_type), intent(in) :: prec
|
|
real(kind(0.d0)),intent(in) :: x(:)
|
|
real(kind(0.d0)),intent(inout) :: y(:)
|
|
real(kind(0.d0)),intent(in) :: alpha,beta
|
|
character(len=1) :: trans
|
|
real(kind(0.d0)),target :: work(:)
|
|
integer, intent(out) :: info
|
|
|
|
! Local variables
|
|
integer :: n_row,n_col
|
|
real(kind(1.d0)), pointer :: ww(:), aux(:)
|
|
integer :: ictxt,np,me, err_act, int_err(5)
|
|
integer :: debug_level, debug_unit
|
|
character :: trans_
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_bjac_aply'
|
|
info = 0
|
|
call psb_erractionsave(err_act)
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
ictxt = psb_cd_get_context(desc_data)
|
|
call psb_info(ictxt, me, np)
|
|
|
|
|
|
trans_ = toupper(trans)
|
|
select case(trans_)
|
|
case('N','T','C')
|
|
! Ok
|
|
case default
|
|
call psb_errpush(40,name)
|
|
goto 9999
|
|
end select
|
|
|
|
|
|
n_row=desc_data%matrix_data(psb_n_row_)
|
|
n_col=desc_data%matrix_data(psb_n_col_)
|
|
|
|
if (n_col <= size(work)) then
|
|
ww => work(1:n_col)
|
|
if ((4*n_col+n_col) <= size(work)) then
|
|
aux => work(n_col+1:)
|
|
else
|
|
allocate(aux(4*n_col),stat=info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4010,name,a_err='Allocate')
|
|
goto 9999
|
|
end if
|
|
|
|
endif
|
|
else
|
|
allocate(ww(n_col),aux(4*n_col),stat=info)
|
|
if (info /= 0) then
|
|
call psb_errpush(4010,name,a_err='Allocate')
|
|
goto 9999
|
|
end if
|
|
endif
|
|
|
|
|
|
select case(prec%iprcparm(psb_f_type_))
|
|
case(psb_f_ilu_n_)
|
|
|
|
select case(trans_)
|
|
case('N')
|
|
|
|
call psb_spsm(done,prec%av(psb_l_pr_),x,dzero,ww,desc_data,info,&
|
|
& trans=trans_,unit='L',diag=prec%d,choice=psb_none_,work=aux)
|
|
if(info /=0) goto 9999
|
|
call psb_spsm(alpha,prec%av(psb_u_pr_),ww,beta,y,desc_data,info,&
|
|
& trans=trans_,unit='U',choice=psb_none_, work=aux)
|
|
if(info /=0) goto 9999
|
|
|
|
case('T','C')
|
|
call psb_spsm(done,prec%av(psb_u_pr_),x,dzero,ww,desc_data,info,&
|
|
& trans=trans_,unit='L',diag=prec%d,choice=psb_none_, work=aux)
|
|
if(info /=0) goto 9999
|
|
call psb_spsm(alpha,prec%av(psb_l_pr_),ww,beta,y,desc_data,info,&
|
|
& trans=trans_,unit='U',choice=psb_none_,work=aux)
|
|
if(info /=0) goto 9999
|
|
|
|
end select
|
|
|
|
|
|
case default
|
|
info = 4001
|
|
call psb_errpush(info,name,a_err='Invalid factorization')
|
|
goto 9999
|
|
end select
|
|
|
|
if (n_col <= size(work)) then
|
|
if ((4*n_col+n_col) <= size(work)) then
|
|
else
|
|
deallocate(aux)
|
|
endif
|
|
else
|
|
deallocate(ww,aux)
|
|
endif
|
|
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_errpush(info,name,i_err=int_err,a_err=ch_err)
|
|
call psb_erractionrestore(err_act)
|
|
if (err_act == psb_act_abort_) then
|
|
call psb_error()
|
|
return
|
|
end if
|
|
return
|
|
|
|
end subroutine psb_dbjac_aply
|