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317 lines
10 KiB
Fortran
317 lines
10 KiB
Fortran
!
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!
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! AMG4PSBLAS version 1.0
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! Algebraic Multigrid Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.7)
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!
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! (C) Copyright 2021
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!
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! Salvatore Filippone
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! Pasqua D'Ambra
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! Fabio Durastante
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions
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! are met:
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! 1. Redistributions of source code must retain the above copyright
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! notice, this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright
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! notice, this list of conditions, and the following disclaimer in the
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! documentation and/or other materials provided with the distribution.
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! 3. The name of the AMG4PSBLAS group or the names of its contributors may
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! not be used to endorse or promote products derived from this
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! software without specific prior written permission.
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!
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! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
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! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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! POSSIBILITY OF SUCH DAMAGE.
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!
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!
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!
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! File: amg_d_umf_solver_mod.f90
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!
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! Module: amg_d_umf_solver_mod
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!
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! This module defines:
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! - the amg_d_umf_solver_type data structure containing the ingredients
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! to interface with the UMFPACK package.
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! 1. The factorization is restricted to the diagonal block of the
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! current image.
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!
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module amg_d_umf_solver
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use iso_c_binding
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use amg_d_base_solver_mod
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#if defined(PSB_IPK8)
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type, extends(amg_d_base_solver_type) :: amg_d_umf_solver_type
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end type amg_d_umf_solver_type
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#else
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type, extends(amg_d_base_solver_type) :: amg_d_umf_solver_type
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type(c_ptr) :: symbolic=c_null_ptr, numeric=c_null_ptr
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integer(c_long_long) :: symbsize=0, numsize=0
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contains
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procedure, pass(sv) :: build => amg_d_umf_solver_bld
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procedure, pass(sv) :: apply_a => amg_d_umf_solver_apply
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procedure, pass(sv) :: apply_v => amg_d_umf_solver_apply_vect
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procedure, pass(sv) :: free => d_umf_solver_free
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procedure, pass(sv) :: clear_data => d_umf_solver_clear_data
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procedure, pass(sv) :: descr => d_umf_solver_descr
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procedure, pass(sv) :: sizeof => d_umf_solver_sizeof
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procedure, nopass :: get_fmt => d_umf_solver_get_fmt
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procedure, nopass :: get_id => d_umf_solver_get_id
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final :: d_umf_solver_finalize
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end type amg_d_umf_solver_type
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private :: d_umf_solver_free, d_umf_solver_descr, &
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& d_umf_solver_sizeof, &
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& d_umf_solver_get_fmt, d_umf_solver_get_id, &
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& d_umf_solver_clear_data
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private :: d_umf_solver_finalize
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interface
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function amg_dumf_fact(n,nnz,values,rowind,colptr,&
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& symptr,numptr,ssize,nsize)&
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& bind(c,name='amg_dumf_fact') result(info)
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use iso_c_binding
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integer(c_int), value :: n,nnz
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integer(c_int) :: info
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integer(c_long_long) :: ssize, nsize
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integer(c_int) :: rowind(*),colptr(*)
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real(c_double) :: values(*)
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type(c_ptr) :: symptr, numptr
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end function amg_dumf_fact
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end interface
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interface
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function amg_dumf_solve(itrans,n,x, b, ldb, numptr)&
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& bind(c,name='amg_dumf_solve') result(info)
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use iso_c_binding
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integer(c_int) :: info
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integer(c_int), value :: itrans,n,ldb
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real(c_double) :: x(*), b(ldb,*)
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type(c_ptr), value :: numptr
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end function amg_dumf_solve
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end interface
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interface
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function amg_dumf_free(symptr, numptr)&
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& bind(c,name='amg_dumf_free') result(info)
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use iso_c_binding
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integer(c_int) :: info
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type(c_ptr), value :: symptr, numptr
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end function amg_dumf_free
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end interface
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interface
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subroutine amg_d_umf_solver_apply(alpha,sv,x,beta,y,desc_data,&
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& trans,work,info,init,initu)
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use psb_base_mod
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import amg_d_umf_solver_type
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implicit none
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type(psb_desc_type), intent(in) :: desc_data
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class(amg_d_umf_solver_type), intent(inout) :: sv
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real(psb_dpk_),intent(inout) :: x(:)
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real(psb_dpk_),intent(inout) :: y(:)
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real(psb_dpk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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real(psb_dpk_),target, intent(inout) :: work(:)
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integer(psb_ipk_), intent(out) :: info
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character, intent(in), optional :: init
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real(psb_dpk_),intent(inout), optional :: initu(:)
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end subroutine amg_d_umf_solver_apply
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end interface
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interface
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subroutine amg_d_umf_solver_apply_vect(alpha,sv,x,beta,y,desc_data,&
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& trans,work,wv,info,init,initu)
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use psb_base_mod
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import amg_d_umf_solver_type
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implicit none
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type(psb_desc_type), intent(in) :: desc_data
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class(amg_d_umf_solver_type), intent(inout) :: sv
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type(psb_d_vect_type),intent(inout) :: x
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type(psb_d_vect_type),intent(inout) :: y
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real(psb_dpk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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real(psb_dpk_),target, intent(inout) :: work(:)
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type(psb_d_vect_type),intent(inout) :: wv(:)
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integer(psb_ipk_), intent(out) :: info
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character, intent(in), optional :: init
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type(psb_d_vect_type),intent(inout), optional :: initu
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end subroutine amg_d_umf_solver_apply_vect
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end interface
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interface
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subroutine amg_d_umf_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
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use psb_base_mod
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import amg_d_umf_solver_type
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Implicit None
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! Arguments
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type(psb_dspmat_type), intent(in), target :: a
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Type(psb_desc_type), Intent(inout) :: desc_a
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class(amg_d_umf_solver_type), intent(inout) :: sv
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integer(psb_ipk_), intent(out) :: info
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type(psb_dspmat_type), intent(in), target, optional :: b
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class(psb_d_base_sparse_mat), intent(in), optional :: amold
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class(psb_d_base_vect_type), intent(in), optional :: vmold
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class(psb_i_base_vect_type), intent(in), optional :: imold
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end subroutine amg_d_umf_solver_bld
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end interface
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contains
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subroutine d_umf_solver_free(sv,info)
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Implicit None
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! Arguments
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class(amg_d_umf_solver_type), intent(inout) :: sv
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integer, intent(out) :: info
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Integer :: err_act
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character(len=20) :: name='d_umf_solver_free'
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call psb_erractionsave(err_act)
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call sv%clear_data(info)
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if (info /= psb_success_) goto 9999
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine d_umf_solver_free
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subroutine d_umf_solver_clear_data(sv,info)
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Implicit None
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! Arguments
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class(amg_d_umf_solver_type), intent(inout) :: sv
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integer, intent(out) :: info
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Integer :: err_act
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character(len=20) :: name='d_umf_solver_clear_data'
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call psb_erractionsave(err_act)
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info = 0
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if (c_associated(sv%symbolic).and.c_associated(sv%numeric)) then
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info = amg_dumf_free(sv%symbolic,sv%numeric)
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if (info /= psb_success_) goto 9999
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sv%symbolic = c_null_ptr
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sv%numeric = c_null_ptr
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sv%symbsize = 0
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sv%numsize = 0
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end if
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine d_umf_solver_clear_data
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subroutine d_umf_solver_finalize(sv)
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Implicit None
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! Arguments
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type(amg_d_umf_solver_type), intent(inout) :: sv
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integer :: info
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Integer :: err_act
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character(len=20) :: name='d_umf_solver_finalize'
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call sv%free(info)
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return
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end subroutine d_umf_solver_finalize
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subroutine d_umf_solver_descr(sv,info,iout,coarse,prefix)
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Implicit None
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! Arguments
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class(amg_d_umf_solver_type), intent(in) :: sv
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integer, intent(out) :: info
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integer, intent(in), optional :: iout
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logical, intent(in), optional :: coarse
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character(len=*), intent(in), optional :: prefix
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! Local variables
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integer :: err_act
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character(len=20), parameter :: name='amg_d_umf_solver_descr'
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integer :: iout_
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character(1024) :: prefix_
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call psb_erractionsave(err_act)
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info = psb_success_
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if (present(iout)) then
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iout_ = iout
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else
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iout_ = psb_out_unit
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endif
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if (present(prefix)) then
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prefix_ = prefix
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else
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prefix_ = ""
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end if
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write(iout_,*) trim(prefix_), ' UMFPACK Sparse Factorization Solver. '
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine d_umf_solver_descr
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function d_umf_solver_sizeof(sv) result(val)
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implicit none
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! Arguments
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class(amg_d_umf_solver_type), intent(in) :: sv
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integer(psb_epk_) :: val
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integer :: i
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val = 2*psb_sizeof_lp
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val = val + sv%symbsize
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val = val + sv%numsize
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return
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end function d_umf_solver_sizeof
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function d_umf_solver_get_fmt() result(val)
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implicit none
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character(len=32) :: val
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val = "UMFPACK solver"
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end function d_umf_solver_get_fmt
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function d_umf_solver_get_id() result(val)
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implicit none
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integer(psb_ipk_) :: val
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val = amg_umf_
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end function d_umf_solver_get_id
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#endif
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end module amg_d_umf_solver
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