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psblas3/base/comm/psb_cgather.f90

328 lines
10 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 2.2
!!$ (C) Copyright 2006/2007/2008
!!$ 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.
!!$
!!$
! File: psb_cgather.f90
!
! Subroutine: psb_cgatherm
! This subroutine gathers pieces of a distributed dense matrix into a local one.
!
! Arguments:
! globx - cplx,dimension(:,:). The local matrix into which gather
! the distributed pieces.
! locx - cplx,dimension(:,:). The local piece of the distributed
! matrix to be gathered.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Error code.
! iroot - integer. The process that has to own the
! global matrix. If -1 all
! the processes will have a copy.
!
subroutine psb_cgatherm(globx, locx, desc_a, info, iroot)
use psb_sparse_mod, psb_protect_name => psb_cgatherm
implicit none
complex(psb_spk_), intent(in) :: locx(:,:)
complex(psb_spk_), intent(out) :: globx(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
integer, intent(in), optional :: iroot
! locals
integer :: int_err(5), ictxt, np, me, &
& err_act, n, root, iiroot, ilocx, iglobx, jlocx,&
& jglobx, lda_locx, lda_globx, m, lock, globk, maxk, k, jlx, ilx, i, j, idx
character(len=20) :: name, ch_err
name='psb_cgatherm'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
! check on blacs grid
call psb_info(ictxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
if (present(iroot)) then
root = iroot
if((root < -1).or.(root > np)) then
info=psb_err_input_value_invalid_i_
int_err(1:2)=(/5,root/)
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
else
root = -1
end if
if (root == -1) then
iiroot = psb_root_
else
iiroot = root
endif
iglobx = 1
jglobx = 1
ilocx = 1
jlocx = 1
lda_globx = size(globx,1)
lda_locx = size(locx, 1)
m = psb_cd_get_global_rows(desc_a)
n = psb_cd_get_global_cols(desc_a)
lock=size(locx,2)-jlocx+1
globk=size(globx,2)-jglobx+1
maxk=min(lock,globk)
k = maxk
call psb_bcast(ictxt,k,root=iiroot)
! there should be a global check on k here!!!
call psb_chkglobvect(m,n,size(globx,1),iglobx,jglobx,desc_a,info)
if (info == psb_success_) &
& call psb_chkvect(m,n,size(locx,1),ilocx,jlocx,desc_a,info,ilx,jlx)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_chk(glob)vect'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
if ((ilx /= 1).or.(iglobx /= 1)) then
info=psb_err_ix_n1_iy_n1_unsupported_
call psb_errpush(info,name)
goto 9999
end if
globx(:,:)=0.d0
do j=1,k
do i=1,psb_cd_get_local_rows(desc_a)
idx = desc_a%idxmap%loc_to_glob(i)
globx(idx,jglobx+j-1) = locx(i,jlx+j-1)
end do
end do
do j=1,k
! adjust overlapped elements
do i=1, size(desc_a%ovrlap_elem,1)
if (me /= desc_a%ovrlap_elem(i,3)) then
idx = desc_a%ovrlap_elem(i,1)
idx = desc_a%idxmap%loc_to_glob(idx)
globx(idx,jglobx+j-1) = czero
end if
end do
end do
call psb_sum(ictxt,globx(1:m,jglobx:jglobx+k-1),root=root)
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error(ictxt)
return
end if
return
end subroutine psb_cgatherm
!!$
!!$ Parallel Sparse BLAS version 2.2
!!$ (C) Copyright 2006/2007/2008
!!$ 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_cgatherv
! This subroutine gathers pieces of a distributed dense vector into a local one.
!
! Arguments:
! globx - cplx,dimension(:). The local vector into which gather
! the distributed pieces.
! locx - cplx,dimension(:). The local piece of the distributed
! vector to be gathered.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Error code.
! iroot - integer. The process that has to own the
! global matrix. If -1 all
! the processes will have a copy.
! default: -1
!
subroutine psb_cgatherv(globx, locx, desc_a, info, iroot)
use psb_sparse_mod, psb_protect_name => psb_cgatherv
implicit none
complex(psb_spk_), intent(in) :: locx(:)
complex(psb_spk_), intent(out) :: globx(:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
integer, intent(in), optional :: iroot
! locals
integer :: int_err(5), ictxt, np, me, &
& err_act, n, root, ilocx, iglobx, jlocx,&
& jglobx, lda_locx, lda_globx, m, k, jlx, ilx, i, idx
character(len=20) :: name, ch_err
name='psb_cgatherv'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
! check on blacs grid
call psb_info(ictxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
if (present(iroot)) then
root = iroot
if((root < -1).or.(root > np)) then
info=psb_err_input_value_invalid_i_
int_err(1:2)=(/5,root/)
call psb_errpush(info,name,i_err=int_err)
goto 9999
end if
else
root = -1
end if
jglobx=1
iglobx = 1
jlocx=1
ilocx = 1
lda_globx = size(globx)
lda_locx = size(locx)
m = psb_cd_get_global_rows(desc_a)
n = psb_cd_get_global_cols(desc_a)
k = 1
! there should be a global check on k here!!!
call psb_chkglobvect(m,n,size(globx),iglobx,jglobx,desc_a,info)
if (info == psb_success_) &
& call psb_chkvect(m,n,size(locx),ilocx,jlocx,desc_a,info,ilx,jlx)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_chk(glob)vect'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
if ((ilx /= 1).or.(iglobx /= 1)) then
info=psb_err_ix_n1_iy_n1_unsupported_
call psb_errpush(info,name)
goto 9999
end if
globx(:)=0.d0
do i=1,psb_cd_get_local_rows(desc_a)
idx = desc_a%idxmap%loc_to_glob(i)
globx(idx) = locx(i)
end do
! adjust overlapped elements
do i=1, size(desc_a%ovrlap_elem,1)
if (me /= desc_a%ovrlap_elem(i,3)) then
idx = desc_a%ovrlap_elem(i,1)
idx = desc_a%idxmap%loc_to_glob(idx)
globx(idx) = czero
end if
end do
call psb_sum(ictxt,globx(1:m),root=root)
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error(ictxt)
return
end if
return
end subroutine psb_cgatherv