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psblas3/base/comm/psb_i2halo_a.f90

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!
! 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_i2halo.f90
!
! Subroutine: psb_i2halom
! This subroutine performs the exchange of the halo elements in a
! distributed dense matrix between all the processes.
!
! Arguments:
! x - integer,dimension(:,:). The local part of the dense matrix.
! 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 - integer(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_i2halom(x,desc_a,info,jx,ik,work,tran,mode,data)
use psb_base_mod, psb_protect_name => psb_i2halom
use psi_mod
implicit none
integer(psb_i2pk_), intent(inout), target :: x(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(out) :: info
integer(psb_i2pk_), optional, target, intent(inout) :: work(:)
integer(psb_ipk_), intent(in), optional :: mode,jx,ik,data
character, intent(in), optional :: tran
! locals
type(psb_ctxt_type) :: ctxt
integer(psb_mpk_) :: np, me
integer(psb_ipk_) :: err_act, iix, jjx, k, maxk, nrow, imode, i,&
& liwork,data_, ldx
integer(psb_lpk_) :: m, n, ix, ijx
integer(psb_i2pk_),pointer :: iwork(:), xp(:,:)
character :: tran_
character(len=20) :: name, ch_err
logical :: aliw
name='psb_i2halom'
info=psb_success_
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
ctxt=desc_a%get_context()
! check on blacs grid
call psb_info(ctxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
if (present(jx)) then
ijx = jx
else
ijx = 1
endif
m = desc_a%get_global_rows()
n = desc_a%get_global_cols()
nrow = desc_a%get_local_rows()
maxk=size(x,2)-ijx+1
if(present(ik)) then
if(ik > maxk) then
k=maxk
else
k=ik
end if
else
k = maxk
end if
if (present(tran)) then
tran_ = psb_toupper(tran)
else
tran_ = 'N'
endif
if (present(mode)) then
imode = mode
else
imode = IOR(psb_swap_send_,psb_swap_recv_)
endif
if (present(data)) then
data_ = data
else
data_ = psb_comm_halo_
endif
ldx = size(x,1)
! check vector correctness
call psb_chkvect(m,lone,ldx,ix,ijx,desc_a,info,iix,jjx,check_halo=.true.)
if(info /= psb_success_) then
info=psb_err_from_subroutine_ ; ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
liwork=nrow
if (present(work)) then
if(size(work) >= liwork) then
aliw=.false.
iwork => work
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
xp => x(iix:size(x,1),jjx:jjx+k-1)
if(tran_ == 'N') then
call psi_swapdata(imode,k,i2zero,xp,&
& desc_a,iwork,info,data=data_)
else if((tran_ == 'T').or.(tran_ == 'C')) then
call psi_swaptran(imode,k,i2one,xp,&
&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_cswapdata'
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(ctxt,err_act)
return
end subroutine psb_i2halom
!!$
!!$ Parallel Sparse BLAS version 3.5
!!$ (C) Copyright 2006-2018
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ 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.
!!$
!!$
!
! Subroutine: psb_i2halov
! This subroutine performs the exchange of the halo elements in a
! distributed dense vector between all the processes.
!
! Arguments:
! x - real,dimension(:). The local part of the dense 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 - integer(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_i2halov(x,desc_a,info,work,tran,mode,data)
use psb_base_mod, psb_protect_name => psb_i2halov
use psi_mod
implicit none
integer(psb_i2pk_), intent(inout) :: x(:)
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(out) :: info
integer(psb_i2pk_), target, optional, intent(inout) :: work(:)
integer(psb_ipk_), intent(in), optional :: mode,data
character, intent(in), optional :: tran
! locals
type(psb_ctxt_type) :: ctxt
integer(psb_mpk_) :: np, me
integer(psb_ipk_) :: err_act, ldx, iix, jjx, nrow, imode, liwork,data_
integer(psb_lpk_) :: m, n, ix, ijx
integer(psb_i2pk_),pointer :: iwork(:)
character :: tran_
character(len=20) :: name, ch_err
logical :: aliw
name='psb_i2halov'
info=psb_success_
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
ctxt=desc_a%get_context()
! check on blacs grid
call psb_info(ctxt, me, np)
if (np == -1) then
info = psb_err_context_error_
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()
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
ldx = size(x,1)
! check vector correctness
call psb_chkvect(m,lone,ldx,ix,ijx,desc_a,info,iix,jjx,check_halo=.true.)
if(info /= psb_success_) then
info=psb_err_from_subroutine_ ; ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
liwork=nrow
if (present(work)) then
if(size(work) >= liwork) then
aliw=.false.
iwork => work
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,i2zero,x(iix:size(x)),&
& desc_a,iwork,info,data=data_)
else if((tran_ == 'T').or.(tran_ == 'C')) then
call psi_swaptran(imode,i2one,x(iix:size(x)),&
& 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(ctxt,err_act)
return
end subroutine psb_i2halov