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399 lines
11 KiB
Fortran
399 lines
11 KiB
Fortran
!!$
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!!$ Parallel Sparse BLAS v2.0
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!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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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_ihalo.f90
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!
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! Subroutine: psb_ihalom
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! This subroutine performs the exchange of the halo elements in a
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! distributed dense matrix between all the processes.
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!
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! Parameters:
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! x - integer,dimension(:,:). The local part of the dense matrix.
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! desc_a - type(<psb_desc_type>). The communication descriptor.
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! info - integer. Eventually returns an error code.
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! alpha - real(optional). ???.
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! jx - integer(optional). The starting column of the global matrix.
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! ik - integer(optional). The number of columns to gather.
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! work - integer(optional). A working area.
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! tran - character(optional). ???.
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! mode - integer(optional).
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!
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subroutine psb_ihalom(x,desc_a,info,alpha,jx,ik,work,tran,mode)
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use psb_descriptor_type
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use psb_const_mod
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use psi_mod
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use psb_realloc_mod
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use psb_check_mod
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use psb_error_mod
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use psb_penv_mod
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implicit none
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integer, intent(inout), target :: x(:,:)
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type(psb_desc_type), intent(in) :: desc_a
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integer, intent(out) :: info
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real(kind(1.d0)), intent(in), optional :: alpha
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integer, intent(inout), optional, target :: work(:)
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integer, intent(in), optional :: mode,jx,ik
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character, intent(in), optional :: tran
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! locals
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integer :: ictxt, np, me, &
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& err_act, m, n, iix, jjx, ix, ijx, nrow, k, maxk, liwork,&
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& imode, err
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integer, pointer :: xp(:,:), iwork(:)
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character :: ltran
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character(len=20) :: name, ch_err
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logical :: aliw
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name='psb_ihalom'
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if(psb_get_errstatus().ne.0) return
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info=0
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call psb_erractionsave(err_act)
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ictxt=psb_cd_get_context(desc_a)
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! check on blacs grid
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call psb_info(ictxt, me, np)
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if (np == -1) then
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info = 2010
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call psb_errpush(info,name)
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goto 9999
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endif
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ix = 1
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if (present(jx)) then
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ijx = jx
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else
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ijx = 1
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endif
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m = psb_cd_get_global_rows(desc_a)
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n = psb_cd_get_global_cols(desc_a)
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nrow = psb_cd_get_local_rows(desc_a)
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maxk=size(x,2)-ijx+1
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if(present(ik)) then
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if(ik.gt.maxk) then
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k=maxk
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else
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k=ik
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end if
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else
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k = maxk
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end if
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if (present(tran)) then
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ltran = tran
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else
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ltran = 'N'
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endif
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if (present(mode)) then
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imode = mode
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else
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imode = IOR(psb_swap_send_,psb_swap_recv_)
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endif
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! check vector correctness
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call psb_chkvect(m,1,size(x,1),ix,ijx,desc_a,info,iix,jjx)
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if(info.ne.0) then
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info=4010
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ch_err='psb_chkvect'
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call psb_errpush(info,name,a_err=ch_err)
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end if
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if (iix.ne.1) then
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info=3040
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call psb_errpush(info,name)
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end if
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err=info
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call psb_errcomm(ictxt,err)
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if(err.ne.0) goto 9999
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! we should write an "iscal"
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!!$ if(present(alpha)) then
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!!$ if(alpha.ne.1.d0) then
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!!$ do i=0, k-1
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!!$ call iscal(nrow,alpha,x(1,jjx+i),1)
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!!$ end do
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!!$ end if
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!!$ end if
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liwork=nrow
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if (present(work)) then
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if(size(work).ge.liwork) then
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aliw=.false.
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iwork => work
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else
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aliw=.true.
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allocate(iwork(liwork),stat=info)
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if(info.ne.0) then
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info=4010
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ch_err='psb_realloc'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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end if
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else
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aliw=.true.
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allocate(iwork(liwork),stat=info)
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if(info.ne.0) then
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info=4010
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ch_err='psb_realloc'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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end if
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xp => x(iix:size(x,1),jjx:jjx+k-1)
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! exchange halo elements
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if(ltran.eq.'N') then
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call psi_swapdata(imode,k,0,xp,&
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& desc_a,iwork,info)
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else if((ltran.eq.'T').or.(ltran.eq.'H')) then
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call psi_swaptran(imode,k,1,xp,&
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& desc_a,iwork,info)
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end if
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if(info.ne.0) then
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call psb_errpush(4010,name,a_err='PSI_iSwap...')
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goto 9999
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end if
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if (aliw) deallocate(iwork)
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nullify(iwork)
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act.eq.act_abort) then
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call psb_error(ictxt)
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return
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end if
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return
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end subroutine psb_ihalom
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!!$
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!!$ Parallel Sparse BLAS v2.0
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!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
|
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!!$ 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.
|
|
!!$
|
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!!$ 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
|
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!!$ 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
|
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!!$ POSSIBILITY OF SUCH DAMAGE.
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!!$
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!!$
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! Subroutine: psb_ihalov
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! This subroutine performs the exchange of the halo elements in a
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! distributed dense matrix between all the processes.
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!
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! Parameters:
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! x - integer,dimension(:). The local part of the dense matrix.
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! desc_a - type(<psb_desc_type>). The communication descriptor.
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! info - integer. Eventually returns an error code.
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! alpha - real(optional). ???.
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! work - integer(optional). A working area.
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! tran - character(optional). ???.
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! mode - integer(optional).
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!
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subroutine psb_ihalov(x,desc_a,info,alpha,work,tran,mode)
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use psb_descriptor_type
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use psb_const_mod
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use psi_mod
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use psb_realloc_mod
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use psb_check_mod
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use psb_error_mod
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use psb_penv_mod
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implicit none
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integer, intent(inout) :: x(:)
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type(psb_desc_type), intent(in) :: desc_a
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integer, intent(out) :: info
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real(kind(1.d0)), intent(in), optional :: alpha
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integer, intent(inout), optional, target :: work(:)
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integer, intent(in), optional :: mode
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character, intent(in), optional :: tran
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! locals
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integer :: ictxt, np, me,&
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& err_act, m, n, iix, jjx, ix, ijx, nrow, imode,&
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& err, liwork
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integer,pointer :: iwork(:)
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character :: ltran
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character(len=20) :: name, ch_err
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logical :: aliw
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name='psb_ihalov'
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if(psb_get_errstatus().ne.0) return
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info=0
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call psb_erractionsave(err_act)
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ictxt=psb_cd_get_context(desc_a)
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! check on blacs grid
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call psb_info(ictxt, me, np)
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if (np == -1) then
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info = 2010
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call psb_errpush(info,name)
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goto 9999
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endif
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ix = 1
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ijx = 1
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m = psb_cd_get_global_rows(desc_a)
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n = psb_cd_get_global_cols(desc_a)
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nrow = psb_cd_get_local_rows(desc_a)
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! ncol = psb_cd_get_local_cols(desc_a)
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if (present(tran)) then
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ltran = tran
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else
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ltran = 'N'
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endif
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if (present(mode)) then
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imode = mode
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else
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imode = IOR(psb_swap_send_,psb_swap_recv_)
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endif
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! check vector correctness
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call psb_chkvect(m,1,size(x,1),ix,ijx,desc_a,info,iix,jjx)
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if(info.ne.0) then
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info=4010
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ch_err='psb_chkvect'
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call psb_errpush(info,name,a_err=ch_err)
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end if
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if (iix.ne.1) then
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info=3040
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call psb_errpush(info,name)
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end if
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err=info
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call psb_errcomm(ictxt,err)
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if(err.ne.0) goto 9999
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!!$ if(present(alpha)) then
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!!$ if(alpha.ne.1.d0) then
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!!$ call dscal(nrow,alpha,x,1)
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!!$ end if
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!!$ end if
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liwork=nrow
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if (present(work)) then
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if(size(work).ge.liwork) then
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aliw=.false.
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iwork => work
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else
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aliw=.true.
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allocate(iwork(liwork),stat=info)
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if(info.ne.0) then
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info=4010
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ch_err='psb_realloc'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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end if
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else
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aliw=.true.
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allocate(iwork(liwork),stat=info)
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if(info.ne.0) then
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info=4010
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ch_err='psb_realloc'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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end if
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! exchange halo elements
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if(ltran.eq.'N') then
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call psi_swapdata(imode,0,x(iix:size(x)),&
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& desc_a,iwork,info)
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else if((ltran.eq.'T').or.(ltran.eq.'H')) then
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call psi_swaptran(imode,1,x(iix:size(x)),&
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& desc_a,iwork,info)
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end if
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if(info.ne.0) then
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call psb_errpush(4010,name,a_err='PSI_iswapdata')
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goto 9999
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end if
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if (aliw) deallocate(iwork)
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nullify(iwork)
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act.eq.act_abort) then
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call psb_error(ictxt)
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return
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end if
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return
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end subroutine psb_ihalov
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