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amg4psblas/amgprec/impl/aggregator/amg_c_rap.f90

165 lines
6.1 KiB
Fortran

!
!
! AMG4PSBLAS version 1.0
! Algebraic Multigrid Package
! based on PSBLAS (Parallel Sparse BLAS version 3.7)
!
! (C) Copyright 2021
!
! Salvatore Filippone
! Pasqua D'Ambra
! Fabio Durastante
!
! 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 AMG4PSBLAS 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 AMG4PSBLAS 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: amg_rap.F90
!
! This routine computes the triple product :
! AC = R A P
! R is stored in Restr
! WARNINGS:
! 1. So far this has only been tested with R=P^T
! 2. Patterns and descriptors need to be consistent
! between initial build and application of this.
!
subroutine amg_c_rap(a_csr,desc_a,nlaggr,parms,ac,&
& coo_prol,desc_ac,coo_restr,info)
use psb_base_mod
use amg_c_inner_mod
use amg_c_base_aggregator_mod, amg_protect_name => amg_c_rap
implicit none
! Arguments
type(psb_c_csr_sparse_mat), intent(inout) :: a_csr
type(psb_desc_type), intent(inout) :: desc_a
integer(psb_lpk_), intent(inout) :: nlaggr(:)
type(amg_sml_parms), intent(inout) :: parms
type(psb_c_coo_sparse_mat), intent(inout) :: coo_prol, coo_restr
type(psb_desc_type), intent(inout) :: desc_ac
type(psb_cspmat_type), intent(out) :: ac
integer(psb_ipk_), intent(out) :: info
! Local variables
integer(psb_ipk_) :: err_act
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: np, me, ndx
character(len=40) :: name
type(psb_lc_coo_sparse_mat) :: ac_coo, tmpcoo
type(psb_c_csr_sparse_mat) :: acsr3, csr_prol, ac_csr, csr_restr
integer(psb_ipk_) :: debug_level, debug_unit, naggr
integer(psb_lpk_) :: nglob, ntaggr, naggrm1, naggrp1
integer(psb_ipk_) :: nrow, ncol, nrl, nzl, ip, nzt, i, k
integer(psb_lpk_) :: nrsave, ncsave, nzsave, nza
logical, parameter :: debug=.false.
name='amg_rap'
if(psb_get_errstatus().ne.0) return
info=psb_success_
call psb_erractionsave(err_act)
ctxt = desc_a%get_context()
call psb_info(ctxt, me, np)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
nglob = desc_a%get_global_rows()
nrow = desc_a%get_local_rows()
ncol = desc_a%get_local_cols()
naggr = nlaggr(me+1)
ntaggr = sum(nlaggr)
naggrm1 = sum(nlaggr(1:me))
naggrp1 = sum(nlaggr(1:me+1))
!
! COO_PROL should arrive here with local numbering
!
if (debug) write(0,*) me,' ',trim(name),' Size check on entry New: ',&
& coo_prol%get_fmt(),coo_prol%get_nrows(),coo_prol%get_ncols(),coo_prol%get_nzeros(),&
& nrow,ntaggr,naggr
call coo_prol%cp_to_fmt(csr_prol,info)
if (debug) write(0,*) me,trim(name),' Product AxPROL ',&
& a_csr%get_nrows(),a_csr%get_ncols(), csr_prol%get_nrows(), &
& desc_a%get_local_rows(),desc_a%get_local_cols(),&
& desc_ac%get_local_rows(),desc_a%get_local_cols()
if (debug) flush(0)
call psb_par_spspmm(a_csr,desc_a,csr_prol,acsr3,desc_ac,info)
if (debug) write(0,*) me,trim(name),' Done AxPROL ',&
& acsr3%get_nrows(),acsr3%get_ncols(), acsr3%get_nzeros(),&
& desc_ac%get_local_rows(),desc_ac%get_local_cols()
!
! Remember that RESTR must be built from PROL after halo extension,
! which is done above in psb_par_spspmm
if (debug) write(0,*)me,' ',name,' No inp_restr, transposing prol ',&
& csr_prol%get_nrows(),csr_prol%get_ncols(),csr_prol%get_nzeros()
call csr_restr%cp_from_coo(coo_restr,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='spcnv coo_restr')
goto 9999
end if
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'starting sphalo/ rwxtd'
if (debug) write(0,*) me,trim(name),' Product RESTRxAP ',&
& csr_restr%get_nrows(),csr_restr%get_ncols(), &
& desc_ac%get_local_rows(),desc_a%get_local_cols(),&
& acsr3%get_nrows(),acsr3%get_ncols()
call psb_par_spspmm(csr_restr,desc_a,acsr3,ac_csr,desc_ac,info)
call acsr3%free()
call ac_csr%set_nrows(desc_ac%get_local_rows())
call ac_csr%set_ncols(desc_ac%get_local_cols())
call ac%mv_from(ac_csr)
call ac%set_asb()
if (debug) write(0,*) me,' ',trim(name),' After mv_from',psb_get_errstatus()
if (debug) write(0,*) me,' ',trim(name),' ',ac%get_fmt(),ac%get_nrows(),ac%get_ncols(),ac%get_nzeros(),naggr,ntaggr
call coo_prol%set_ncols(desc_ac%get_local_cols())
if (debug) call check_coo(me,trim(name)//' Check 3 on coo_restr:',coo_restr)
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Done rap '
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine amg_c_rap