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