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amg4psblas/mlprec/impl/mld_cprecset.F90

793 lines
27 KiB
Fortran

!
!
! MLD2P4 version 2.1
! MultiLevel Domain Decomposition Parallel Preconditioners Package
! based on PSBLAS (Parallel Sparse BLAS version 3.5)
!
! (C) Copyright 2008-2018
!
! Salvatore Filippone
! Pasqua D'Ambra
! Daniela di Serafino
!
! 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 MLD2P4 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 MLD2P4 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.
!
!
! File: mld_cprecset.f90
!
! Subroutine: mld_cprecseti
! Version: complex
!
! This routine sets the integer parameters defining the preconditioner. More
! precisely, the integer parameter identified by 'what' is assigned the value
! contained in 'val'.
! For the multilevel preconditioners, the levels are numbered in increasing
! order starting from the finest one, i.e. level 1 is the finest level.
!
! To set character and complex parameters, see mld_cprecsetc and mld_cprecsetr,
! respectively.
!
!
! Arguments:
! p - type(mld_cprec_type), input/output.
! The preconditioner data structure.
! what - integer, input.
! The number identifying the parameter to be set.
! A mnemonic constant has been associated to each of these
! numbers, as reported in the MLD2P4 User's and Reference Guide.
! val - integer, input.
! The value of the parameter to be set. The list of allowed
! values is reported in the MLD2P4 User's and Reference Guide.
! info - integer, output.
! Error code.
! ilev - integer, optional, input.
! For the multilevel preconditioner, the level at which the
! preconditioner parameter has to be set.
! If nlev is not present, the parameter identified by 'what'
! is set at all the appropriate levels.
!
! NOTE: currently, the use of the argument ilev is not "safe" and is reserved to
! MLD2P4 developers. Indeed, by using ilev it is possible to set different values
! of the same parameter at different levels 1,...,nlev-1, even in cases where
! the parameter must have the same value at all the levels but the coarsest one.
! For this reason, the interface mld_precset to this routine has been built in
! such a way that ilev is not visible to the user (see mld_prec_mod.f90).
!
subroutine mld_cprecseti(p,what,val,info,ilev,ilmax,pos)
use psb_base_mod
use mld_c_prec_mod, mld_protect_name => mld_cprecseti
use mld_c_jac_smoother
use mld_c_as_smoother
use mld_c_diag_solver
use mld_c_ilu_solver
use mld_c_id_solver
use mld_c_gs_solver
#if defined(HAVE_SLU_)
use mld_c_slu_solver
#endif
#if defined(HAVE_MUMPS_)
use mld_c_mumps_solver
#endif
implicit none
! Arguments
class(mld_cprec_type), intent(inout) :: p
integer(psb_ipk_), intent(in) :: what
integer(psb_ipk_), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: ilev,ilmax
character(len=*), optional, intent(in) :: pos
! Local variables
integer(psb_ipk_) :: ilev_, nlev_, ilmax_, il
character(len=*), parameter :: name='mld_precseti'
info = psb_success_
if (.not.allocated(p%precv)) then
info = 3111
write(psb_err_unit,*) name,&
& ': Error: uninitialized preconditioner,',&
&' should call MLD_PRECINIT'
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmax_ = ilev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
select case(what)
case (mld_min_coarse_size_)
p%min_coarse_size = max(val,-1)
return
case(mld_max_levs_)
p%max_levs = max(val,1)
return
case(mld_outer_sweeps_)
p%outer_sweeps = max(val,1)
return
end select
!
! Set preconditioner parameters at level ilev.
!
if (present(ilev)) then
select case(what)
case(mld_smoother_type_,mld_sub_solve_,mld_smoother_sweeps_,&
& mld_ml_cycle_,mld_par_aggr_alg_,mld_aggr_ord_,mld_aggr_type_,&
& mld_aggr_prol_, mld_aggr_omega_alg_,mld_aggr_eig_,&
& mld_sub_restr_,mld_sub_prol_, &
& mld_sub_ovr_,mld_sub_fillin_,&
& mld_coarse_mat_)
do il=ilev_, ilmax_
call p%precv(il)%set(what,val,info,pos=pos)
end do
case(mld_coarse_subsolve_)
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(ilev_)%set(mld_sub_solve_,val,info,pos=pos)
case(mld_coarse_solve_)
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
if (nlev_ > 1) then
call p%precv(nlev_)%set(mld_coarse_solve_,val,info,pos=pos)
select case (val)
case(mld_bjac_)
call p%precv(nlev_)%set(mld_smoother_type_,val,info,pos=pos)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_sub_solve_,mld_slu_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
#endif
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
case(mld_slu_)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,val,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_ilu_n_, mld_ilu_t_,mld_milu_n_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,val,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
case(mld_mumps_)
#if defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,val,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_umf_)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_slu_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_sludist_)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_slu_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_jac_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_diag_scale_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
end select
endif
case(mld_coarse_sweeps_)
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(nlev_)%set(mld_smoother_sweeps_,val,info,pos=pos)
case(mld_coarse_fillin_)
if (ilev_ /= nlev_) then
write(psb_err_unit,*) name,&
& ': Error: Inconsistent specification of WHAT vs. ILEV'
info = -2
return
end if
call p%precv(nlev_)%set(mld_sub_fillin_,val,info,pos=pos)
case default
do il=ilev_, ilmax_
call p%precv(il)%set(what,val,info,pos=pos)
end do
end select
else if (.not.present(ilev)) then
!
! ilev not specified: set preconditioner parameters at all the appropriate
! levels
!
select case(what)
case(mld_sub_solve_,mld_sub_restr_,mld_sub_prol_,&
& mld_sub_ovr_,mld_sub_fillin_,&
& mld_smoother_sweeps_,mld_smoother_type_)
do ilev_=1,max(1,nlev_-1)
call p%precv(ilev_)%set(what,val,info,pos=pos)
if (info /= 0) return
end do
case(mld_ml_cycle_,mld_par_aggr_alg_,mld_aggr_ord_,mld_aggr_type_,mld_aggr_prol_,&
& mld_aggr_eig_,mld_aggr_filter_)
do ilev_=1,nlev_
call p%precv(ilev_)%set(what,val,info,pos=pos)
end do
case(mld_coarse_mat_)
if (nlev_ > 1) then
call p%precv(nlev_)%set(mld_coarse_mat_,val,info,pos=pos)
end if
case(mld_coarse_solve_)
if (nlev_ > 1) then
call p%precv(nlev_)%set('COARSE_SOLVE',val,info,pos=pos)
select case (val)
case(mld_bjac_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_sub_solve_,mld_slu_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
#endif
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info)
case(mld_slu_)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,val,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_ilu_n_, mld_ilu_t_,mld_milu_n_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,val,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
case(mld_mumps_)
#if defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,val,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_umf_)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_slu_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_sludist_)
#if defined(HAVE_SLU_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_slu_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_repl_mat_,info,pos=pos)
#elif defined(HAVE_MUMPS_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_mumps_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#else
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_ilu_n_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
#endif
case(mld_jac_)
call p%precv(nlev_)%set(mld_smoother_type_,mld_bjac_,info,pos=pos)
call p%precv(nlev_)%set(mld_sub_solve_,mld_diag_scale_,info,pos=pos)
call p%precv(nlev_)%set(mld_coarse_mat_,mld_distr_mat_,info,pos=pos)
end select
endif
case(mld_coarse_subsolve_)
if (nlev_ > 1) then
call p%precv(nlev_)%set(mld_sub_solve_,val,info,pos=pos)
endif
case(mld_coarse_sweeps_)
if (nlev_ > 1) then
call p%precv(nlev_)%set(mld_smoother_sweeps_,val,info,pos=pos)
end if
case(mld_coarse_fillin_)
if (nlev_ > 1) then
call p%precv(nlev_)%set(mld_sub_fillin_,val,info,pos=pos)
end if
case default
do ilev_=1,nlev_
call p%precv(ilev_)%set(what,val,info,pos=pos)
end do
end select
endif
end subroutine mld_cprecseti
subroutine mld_cprecsetsm(p,val,info,ilev,ilmax,pos)
use psb_base_mod
use mld_c_prec_mod, mld_protect_name => mld_cprecsetsm
implicit none
! Arguments
class(mld_cprec_type), intent(inout) :: p
class(mld_c_base_smoother_type), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: ilev,ilmax
character(len=*), optional, intent(in) :: pos
! Local variables
integer(psb_ipk_) :: ilev_, nlev_, ilmin_, ilmax_
character(len=*), parameter :: name='mld_precsetsm'
info = psb_success_
if (.not.allocated(p%precv)) then
info = 3111
write(psb_err_unit,*) name,&
& ': Error: uninitialized preconditioner,',&
&' should call MLD_PRECINIT'
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
ilmin_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmin_ = 1
ilmax_ = nlev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
& ': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
do ilev_ = ilmin_, ilmax_
call p%precv(ilev_)%set(val,info,pos=pos)
if (info /= 0) return
end do
end subroutine mld_cprecsetsm
subroutine mld_cprecsetsv(p,val,info,ilev,ilmax,pos)
use psb_base_mod
use mld_c_prec_mod, mld_protect_name => mld_cprecsetsv
implicit none
! Arguments
class(mld_cprec_type), intent(inout) :: p
class(mld_c_base_solver_type), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: ilev,ilmax
character(len=*), optional, intent(in) :: pos
! Local variables
integer(psb_ipk_) :: ilev_, nlev_, ilmin_, ilmax_
character(len=*), parameter :: name='mld_precsetsv'
info = psb_success_
if (.not.allocated(p%precv)) then
info = 3111
write(psb_err_unit,*) name,&
& ': Error: uninitialized preconditioner,',&
&' should call MLD_PRECINIT'
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
ilmin_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmin_ = 1
ilmax_ = nlev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
& ': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
do ilev_ = ilmin_, ilmax_
call p%precv(ilev_)%set(val,info,pos=pos)
if (info /= 0) return
end do
end subroutine mld_cprecsetsv
!
! Subroutine: mld_cprecsetc
! Version: complex
!
! This routine sets the character parameters defining the preconditioner. More
! precisely, the character parameter identified by 'what' is assigned the value
! contained in 'val'.
! For the multilevel preconditioners, the levels are numbered in increasing
! order starting from the finest one, i.e. level 1 is the finest level.
!
! To set integer and complex parameters, see mld_cprecseti and mld_cprecsetr,
! respectively.
!
!
! Arguments:
! p - type(mld_cprec_type), input/output.
! The preconditioner data structure.
! what - integer, input.
! The number identifying the parameter to be set.
! A mnemonic constant has been associated to each of these
! numbers, as reported in the MLD2P4 User's and Reference Guide.
! string - character(len=*), input.
! The value of the parameter to be set. The list of allowed
! values is reported in the MLD2P4 User's and Reference Guide.
! info - integer, output.
! Error code.
! ilev - integer, optional, input.
! For the multilevel preconditioner, the level at which the
! preconditioner parameter has to be set.
! If nlev is not present, the parameter identified by 'what'
! is set at all the appropriate levels.
!
! NOTE: currently, the use of the argument ilev is not "safe" and is reserved to
! MLD2P4 developers. Indeed, by using ilev it is possible to set different values
! of the same parameter at different levels 1,...,nlev-1, even in cases where
! the parameter must have the same value at all the levels but the coarsest one.
! For this reason, the interface mld_precset to this routine has been built in
! such a way that ilev is not visible to the user (see mld_prec_mod.f90).
!
subroutine mld_cprecsetc(p,what,string,info,ilev,ilmax,pos)
use psb_base_mod
use mld_c_prec_mod, mld_protect_name => mld_cprecsetc
implicit none
! Arguments
class(mld_cprec_type), intent(inout) :: p
integer(psb_ipk_), intent(in) :: what
character(len=*), intent(in) :: string
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: ilev,ilmax
character(len=*), optional, intent(in) :: pos
! Local variables
integer(psb_ipk_) :: ilev_, nlev_,val,ilmax_, il
character(len=*), parameter :: name='mld_precsetc'
info = psb_success_
if (.not.allocated(p%precv)) then
info = 3111
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
else
ilev_ = 1
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
write(psb_err_unit,*) name,&
& ': Error: invalid ILEV/NLEV combination',ilev_, nlev_
info = -1
return
endif
val = mld_stringval(string)
if (val >=0) then
call p%set(what,val,info,ilev=ilev,ilmax=ilmax,pos=pos)
else
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmax_ = ilev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
do il=ilev_, ilmax_
call p%precv(il)%set(what,string,info,pos=pos)
end do
end if
end subroutine mld_cprecsetc
!
! Subroutine: mld_cprecsetr
! Version: complex
!
! This routine sets the complex parameters defining the preconditioner. More
! precisely, the complex parameter identified by 'what' is assigned the value
! contained in 'val'.
! For the multilevel preconditioners, the levels are numbered in increasing
! order starting from the finest one, i.e. level 1 is the finest level.
!
! To set integer and character parameters, see mld_cprecseti and mld_cprecsetc,
! respectively.
!
! Arguments:
! p - type(mld_cprec_type), input/output.
! The preconditioner data structure.
! what - integer, input.
! The number identifying the parameter to be set.
! A mnemonic constant has been associated to each of these
! numbers, as reported in the MLD2P4 User's and Reference Guide.
! val - real(psb_spk_), input.
! The value of the parameter to be set. The list of allowed
! values is reported in the MLD2P4 User's and Reference Guide.
! info - integer, output.
! Error code.
! ilev - integer, optional, input.
! For the multilevel preconditioner, the level at which the
! preconditioner parameter has to be set.
! If nlev is not present, the parameter identified by 'what'
! is set at all the appropriate levels.
!
! NOTE: currently, the use of the argument ilev is not "safe" and is reserved to
! MLD2P4 developers. Indeed, by using ilev it is possible to set different values
! of the same parameter at different levels 1,...,nlev-1, even in cases where
! the parameter must have the same value at all the levels but the coarsest one.
! For this reason, the interface mld_precset to this routine has been built in
! such a way that ilev is not visible to the user (see mld_prec_mod.f90).
!
subroutine mld_cprecsetr(p,what,val,info,ilev,ilmax,pos)
use psb_base_mod
use mld_c_prec_mod, mld_protect_name => mld_cprecsetr
implicit none
! Arguments
class(mld_cprec_type), intent(inout) :: p
integer(psb_ipk_), intent(in) :: what
real(psb_spk_), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: ilev,ilmax
character(len=*), optional, intent(in) :: pos
! Local variables
integer(psb_ipk_) :: ilev_,nlev_, ilmax_, il
real(psb_spk_) :: thr
character(len=*), parameter :: name='mld_precsetr'
info = psb_success_
select case(what)
case (mld_min_cr_ratio_)
p%min_cr_ratio = max(sone,val)
return
end select
if (.not.allocated(p%precv)) then
write(psb_err_unit,*) name,&
&': Error: uninitialized preconditioner,',&
&' should call MLD_PRECINIT'
info = 3111
return
endif
nlev_ = size(p%precv)
if (present(ilev)) then
ilev_ = ilev
if (present(ilmax)) then
ilmax_ = ilmax
else
ilmax_ = ilev_
end if
else
ilev_ = 1
ilmax_ = ilev_
end if
if ((ilev_<1).or.(ilev_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILEV/NLEV combination',ilev_, nlev_
return
endif
if ((ilmax_<1).or.(ilmax_ > nlev_)) then
info = -1
write(psb_err_unit,*) name,&
&': Error: invalid ILMAX/NLEV combination',ilmax_, nlev_
return
endif
!
! Set preconditioner parameters at level ilev.
!
if (present(ilev)) then
do il=ilev_, ilmax_
call p%precv(il)%set(what,val,info,pos=pos)
end do
else if (.not.present(ilev)) then
!
! ilev not specified: set preconditioner parameters at all the appropriate levels
!
select case(what)
case(mld_coarse_iluthrs_)
ilev_=nlev_
call p%precv(ilev_)%set(mld_sub_iluthrs_,val,info,pos=pos)
case default
do il=1,nlev_
call p%precv(il)%set(what,val,info,pos=pos)
end do
end select
endif
end subroutine mld_cprecsetr