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psblas3/base/comm/psb_chalo.f90

344 lines
11 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! 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_chalo.f90
!
! Subroutine: psb_chalo_vect
! This subroutine performs the exchange of the halo elements in a
! distributed vector between all the processes.
!
! Arguments:
! x - type(psb_c_vect_type) The local part of the vector
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
! jx - integer(optional). The starting column of the global matrix.
! ik - integer(optional). The number of columns to gather.
! work - complex(optional). Work area.
! tran - character(optional). Transpose exchange.
! mode - integer(optional). Communication mode (see Swapdata)
! data - integer Which index list in desc_a should be used
! to retrieve rows, default psb_comm_halo_
! psb_comm_halo_ use halo_index
! psb_comm_ext_ use ext_index
! psb_comm_ovrl_ use ovrl_index
! psb_comm_mov_ use ovr_mst_idx
!
!
subroutine psb_chalo_vect(x,desc_a,info,work,tran,mode,data)
use psb_base_mod, psb_protect_name => psb_chalo_vect
use psi_mod
implicit none
type(psb_c_vect_type), intent(inout) :: x
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(out) :: info
complex(psb_spk_), target, optional, intent(inout) :: work(:)
integer(psb_ipk_), intent(in), optional :: mode,data
character, intent(in), optional :: tran
! locals
type(psb_ctxt_type) :: ictxt
integer(psb_ipk_) :: np, me, err_act, iix, jjx, &
& nrow, ncol, lldx, imode, liwork,data_
integer(psb_lpk_) :: m, n, ix, ijx
complex(psb_spk_),pointer :: iwork(:)
character :: tran_
character(len=20) :: name, ch_err
logical :: aliw
name='psb_chalov'
info=psb_success_
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
ictxt=desc_a%get_context()
! 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 (.not.allocated(x%v)) then
info = psb_err_invalid_vect_state_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
m = desc_a%get_global_rows()
n = desc_a%get_global_cols()
nrow = desc_a%get_local_rows()
ncol = desc_a%get_local_cols()
lldx = x%get_nrows()
if (present(tran)) then
tran_ = psb_toupper(tran)
else
tran_ = 'N'
endif
if (present(data)) then
data_ = data
else
data_ = psb_comm_halo_
endif
if (present(mode)) then
imode = mode
else
imode = IOR(psb_swap_send_,psb_swap_recv_)
endif
if ((info == 0).and.(lldx<ncol)) call x%reall(ncol,info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_ ; ch_err='reall'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
liwork=nrow
if (present(work)) then
if(size(work) >= liwork) then
iwork => work
aliw=.false.
else
aliw=.true.
allocate(iwork(liwork),stat=info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
end if
else
aliw=.true.
allocate(iwork(liwork),stat=info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
end if
! exchange halo elements
if(tran_ == 'N') then
call psi_swapdata(imode,czero,x%v,&
& desc_a,iwork,info,data=data_)
else if((tran_ == 'T').or.(tran_ == 'C')) then
call psi_swaptran(imode,cone,x%v,&
& desc_a,iwork,info)
else
info = psb_err_internal_error_
call psb_errpush(info,name,a_err='invalid tran')
goto 9999
end if
if (info /= psb_success_) then
ch_err='PSI_swapdata'
call psb_errpush(psb_err_from_subroutine_,name,a_err=ch_err)
goto 9999
end if
if (aliw) deallocate(iwork)
nullify(iwork)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end subroutine psb_chalo_vect
!
! Subroutine: psb_chalo_multivect
! This subroutine performs the exchange of the halo elements in a
! distributed multivector between all the processes.
!
! Arguments:
! x - type(psb_c_multivect_type) The local part of the multivector
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
! jx - integer(optional). The starting column of the global matrix.
! ik - integer(optional). The number of columns to gather.
! work - complex(optional). Work area.
! tran - character(optional). Transpose exchange.
! mode - integer(optional). Communication mode (see Swapdata)
! data - integer Which index list in desc_a should be used
! to retrieve rows, default psb_comm_halo_
! psb_comm_halo_ use halo_index
! psb_comm_ext_ use ext_index
! psb_comm_ovrl_ use ovrl_index
! psb_comm_mov_ use ovr_mst_idx
!
!
subroutine psb_chalo_multivect(x,desc_a,info,work,tran,mode,data)
use psb_base_mod, psb_protect_name => psb_chalo_multivect
use psi_mod
implicit none
type(psb_c_multivect_type), intent(inout) :: x
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(out) :: info
complex(psb_spk_), target, optional, intent(inout) :: work(:)
integer(psb_ipk_), intent(in), optional :: mode,data
character, intent(in), optional :: tran
! locals
type(psb_ctxt_type) :: ictxt
integer(psb_ipk_) :: np, me, err_act, iix, jjx, &
& nrow, ncol, lldx, imode, liwork,data_
integer(psb_lpk_) :: m, n, ix, ijx
complex(psb_spk_),pointer :: iwork(:)
character :: tran_
character(len=20) :: name, ch_err
logical :: aliw
name='psb_chalov'
info=psb_success_
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
ictxt=desc_a%get_context()
! 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 (.not.allocated(x%v)) then
info = psb_err_invalid_vect_state_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
ijx = 1
m = desc_a%get_global_rows()
n = desc_a%get_global_cols()
nrow = desc_a%get_local_rows()
ncol = desc_a%get_local_cols()
lldx = x%get_nrows()
if (present(tran)) then
tran_ = psb_toupper(tran)
else
tran_ = 'N'
endif
if (present(data)) then
data_ = data
else
data_ = psb_comm_halo_
endif
if (present(mode)) then
imode = mode
else
imode = IOR(psb_swap_send_,psb_swap_recv_)
endif
if (lldx < ncol) call x%reall(ncol,x%get_ncols(),info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_; ch_err='psb_reall'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
liwork=nrow
if (present(work)) then
if(size(work) >= liwork) then
iwork => work
aliw=.false.
else
aliw=.true.
allocate(iwork(liwork),stat=info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
end if
else
aliw=.true.
allocate(iwork(liwork),stat=info)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_realloc'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
end if
! exchange halo elements
if(tran_ == 'N') then
call psi_swapdata(imode,czero,x%v,&
& desc_a,iwork,info,data=data_)
else if((tran_ == 'T').or.(tran_ == 'C')) then
call psi_swaptran(imode,cone,x%v,&
& desc_a,iwork,info)
else
info = psb_err_internal_error_
call psb_errpush(info,name,a_err='invalid tran')
goto 9999
end if
if (info /= psb_success_) then
ch_err='PSI_swapdata'
call psb_errpush(psb_err_from_subroutine_,name,a_err=ch_err)
goto 9999
end if
if (aliw) deallocate(iwork)
nullify(iwork)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end subroutine psb_chalo_multivect