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267 lines
7.7 KiB
Fortran
267 lines
7.7 KiB
Fortran
!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006, 2010, 2015, 2017
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! Salvatore Filippone Cranfield University
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! Alfredo Buttari CNRS-IRIT, Toulouse
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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 PSBLAS 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 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 PSBLAS 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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! File: psb_csymbmm.f90
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! Subroutine:
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! Arguments:
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!
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!
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! Note: This subroutine performs the symbolic product of two sparse matrices.
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! It is modeled after the SMMP package by R. Bank and C. Douglas, but is
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! rewritten in Fortran 95/2003 making use of our sparse matrix facilities.
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!
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subroutine psb_csymbmm(a,b,c,info)
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use psb_base_mod, psb_protect_name => psb_csymbmm
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implicit none
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type(psb_cspmat_type), intent(in) :: a,b
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type(psb_cspmat_type), intent(out) :: c
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integer(psb_ipk_), intent(out) :: info
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type(psb_c_csr_sparse_mat), allocatable :: ccsr
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integer(psb_ipk_) :: err_act
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character(len=*), parameter :: name='psb_symbmm'
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call psb_erractionsave(err_act)
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info = psb_success_
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if ((a%is_null()) .or.(b%is_null())) then
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info = psb_err_invalid_mat_state_
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call psb_errpush(info,name)
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goto 9999
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endif
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allocate(ccsr,stat=info)
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if (info == psb_success_) then
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call psb_symbmm(a%a,b%a,ccsr,info)
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else
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info = psb_err_alloc_dealloc_
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end if
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if (info /= psb_success_) then
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call psb_errpush(info,name)
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goto 9999
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end if
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call move_alloc(ccsr,c%a)
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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 psb_csymbmm
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subroutine psb_cbase_symbmm(a,b,c,info)
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use psb_mat_mod
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use psb_serial_mod, psb_protect_name => psb_cbase_symbmm
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implicit none
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class(psb_c_base_sparse_mat), intent(in) :: a,b
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type(psb_c_csr_sparse_mat), intent(out) :: c
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), allocatable :: itemp(:)
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integer(psb_ipk_) :: nze, ma,na,mb,nb
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character(len=20) :: name
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integer(psb_ipk_) :: err_act
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name='psb_symbmm'
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call psb_erractionsave(err_act)
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info = psb_success_
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ma = a%get_nrows()
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na = a%get_ncols()
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mb = b%get_nrows()
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nb = b%get_ncols()
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if ( mb /= na ) then
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write(psb_err_unit,*) 'Mismatch in SYMBMM: ',ma,na,mb,nb
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info = psb_err_invalid_matrix_sizes_
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call psb_errpush(info,name)
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goto 9999
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endif
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allocate(itemp(max(ma,na,mb,nb)),stat=info)
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if (info /= psb_success_) then
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info = psb_err_alloc_dealloc_
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call psb_Errpush(info,name)
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goto 9999
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endif
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!
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! Note: we need to test whether there is a performance impact
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! in not using the original Douglas & Bank code.
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!
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select type(a)
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type is (psb_c_csr_sparse_mat)
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select type(b)
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type is (psb_c_csr_sparse_mat)
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call csr_symbmm(a,b,c,itemp,info)
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class default
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call gen_symbmm(a,b,c,itemp,info)
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end select
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class default
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call gen_symbmm(a,b,c,itemp,info)
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end select
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if (info /= psb_success_) then
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call psb_errpush(info,name)
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goto 9999
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end if
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call psb_realloc(size(c%ja),c%val,info)
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deallocate(itemp)
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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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contains
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subroutine csr_symbmm(a,b,c,itemp,info)
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type(psb_c_csr_sparse_mat), intent(in) :: a,b
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type(psb_c_csr_sparse_mat), intent(out) :: c
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integer(psb_ipk_) :: itemp(:)
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integer(psb_ipk_), intent(out) :: info
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interface
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subroutine symbmm (n, m, l, ia, ja, diaga, &
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& ib, jb, diagb, ic, jc, diagc, index)
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import :: psb_ipk_
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integer(psb_ipk_) :: n,m,l, ia(*), ja(*), diaga, ib(*), jb(*), diagb,&
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& diagc, index(*)
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integer(psb_ipk_), allocatable :: ic(:),jc(:)
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end subroutine symbmm
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end interface
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integer(psb_ipk_) :: nze, ma,na,mb,nb
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info = psb_success_
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ma = a%get_nrows()
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na = a%get_ncols()
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mb = b%get_nrows()
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nb = b%get_ncols()
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nze = max(ma+1,2*ma)
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call c%allocate(ma,nb,nze)
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call symbmm(ma,na,nb,a%irp,a%ja,izero,&
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& b%irp,b%ja,izero,&
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& c%irp,c%ja,izero,itemp)
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end subroutine csr_symbmm
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subroutine gen_symbmm(a,b,c,index,info)
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class(psb_c_base_sparse_mat), intent(in) :: a,b
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type(psb_c_csr_sparse_mat), intent(out) :: c
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integer(psb_ipk_) :: index(:),info
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integer(psb_ipk_), allocatable :: iarw(:), iacl(:),ibrw(:),ibcl(:)
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integer(psb_ipk_) :: maxlmn,i,j,m,n,k,l,istart,length,nazr,nbzr,jj,minlm,minmn
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integer(psb_ipk_) :: nze, ma,na,mb,nb
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ma = a%get_nrows()
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na = a%get_ncols()
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mb = b%get_nrows()
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nb = b%get_ncols()
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nze = max(ma+1,2*ma)
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call c%allocate(ma,nb,nze)
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n = ma
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m = na
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l = nb
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maxlmn = max(l,m,n)
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allocate(iarw(maxlmn),iacl(maxlmn),ibrw(maxlmn),ibcl(maxlmn),&
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& stat=info)
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if (info /= psb_success_) then
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info = psb_err_alloc_dealloc_
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return
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endif
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do i=1,maxlmn
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index(i)=0
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end do
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c%irp(1)=1
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minlm = min(l,m)
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minmn = min(m,n)
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main: do i=1,n
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istart=-1
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length=0
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call a%csget(i,i,nazr,iarw,iacl,info)
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do jj=1, nazr
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j=iacl(jj)
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if ((j<1).or.(j>m)) then
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write(psb_err_unit,*) ' SymbMM: Problem with A ',i,jj,j,m
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info = 1
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return
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endif
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call b%csget(j,j,nbzr,ibrw,ibcl,info)
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do k=1,nbzr
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if ((ibcl(k)<1).or.(ibcl(k)>maxlmn)) then
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write(psb_err_unit,*) 'Problem in SYMBMM 1:',j,k,ibcl(k),maxlmn
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info=psb_err_pivot_too_small_
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return
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else
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if(index(ibcl(k)) == 0) then
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index(ibcl(k))=istart
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istart=ibcl(k)
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length=length+1
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endif
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endif
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end do
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end do
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c%irp(i+1)=c%irp(i)+length
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if (c%irp(i+1) > size(c%ja)) then
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if (n > (2*i)) then
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nze = max(c%irp(i+1), c%irp(i)*((n+i-1)/i))
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else
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nze = max(c%irp(i+1), nint((dble(c%irp(i))*(dble(n)/i))) )
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endif
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call psb_realloc(nze,c%ja,info)
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end if
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do j= c%irp(i),c%irp(i+1)-1
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c%ja(j)=istart
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istart=index(istart)
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index(c%ja(j))=0
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end do
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call psb_msort(c%ja(c%irp(i):c%irp(i)+length-1))
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index(i) = 0
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end do main
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end subroutine gen_symbmm
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end subroutine psb_cbase_symbmm
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