From ac5e348bbbb290a6a9f5327458bff4257a8eb98a Mon Sep 17 00:00:00 2001 From: Salvatore Filippone Date: Wed, 17 Jan 2007 15:07:32 +0000 Subject: [PATCH] Moving files from PSBLAS2 to MLD2P4. --- psb_zdiagsc_bld.f90 | 164 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 psb_zdiagsc_bld.f90 diff --git a/psb_zdiagsc_bld.f90 b/psb_zdiagsc_bld.f90 new file mode 100644 index 00000000..b925954f --- /dev/null +++ b/psb_zdiagsc_bld.f90 @@ -0,0 +1,164 @@ +!!$ +!!$ +!!$ MD2P4 +!!$ Multilevel Domain Decomposition Parallel Preconditioner Package for PSBLAS +!!$ for +!!$ Parallel Sparse BLAS v2.0 +!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata +!!$ Alfredo Buttari University of Rome Tor Vergata +!!$ Daniela di Serafino Second University of Naples +!!$ Pasqua D'Ambra ICAR-CNR +!!$ +!!$ 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 MD2P4 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 MD2P4 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_zdiagsc_bld(a,desc_a,p,upd,info) + + use psb_base_mod + use psb_prec_type + Implicit None + + type(psb_zspmat_type), target :: a + type(psb_desc_type), intent(in) :: desc_a + type(psb_zbaseprc_type),intent(inout) :: p + character, intent(in) :: upd + integer, intent(out) :: info + + + ! Local scalars + Integer :: err, n_row, n_col,I,j,k,ictxt,& + & me,np,mglob,lw, err_act + complex(kind(1.d0)),pointer :: gd(:), work(:) + integer :: int_err(5) + character :: iupd + + logical, parameter :: debug=.false. + integer,parameter :: iroot=0,iout=60,ilout=40 + character(len=20) :: name, ch_err + + if(psb_get_errstatus().ne.0) return + info=0 + err=0 + call psb_erractionsave(err_act) + name = 'psb_diagsc_bld' + + if (debug) write(0,*) 'Entering diagsc_bld' + info = 0 + int_err(1) = 0 + ictxt = psb_cd_get_context(desc_a) + n_row = psb_cd_get_local_rows(desc_a) + n_col = psb_cd_get_local_cols(desc_a) + mglob = psb_cd_get_global_rows(desc_a) + + if (debug) write(0,*) 'Preconditioner Blacs_gridinfo' + call psb_info(ictxt, me, np) + + if (debug) write(0,*) 'Precond: Diagonal scaling' + ! diagonal scaling + + call psb_realloc(n_col,p%d,info) + if (info /= 0) then + call psb_errpush(4010,name,a_err='psb_realloc') + goto 9999 + end if + + call psb_csrws(p%d,a,info,trans='N') + if(info /= 0) then + info=4010 + ch_err='psb_csrws' + call psb_errpush(info,name,a_err=ch_err) + goto 9999 + end if + + if (debug) write(ilout+me,*) 'VDIAG ',n_row + do i=1,n_row + if (p%d(i) == zzero) then + p%d(i) = zone + else + p%d(i) = zone/p%d(i) + endif + + if (debug) write(ilout+me,*) i,desc_a%loc_to_glob(i), p%d(i) +!!$ if (p%d(i).lt.0.d0) then +!!$ write(0,*) me,'Negative RWS? ',i,p%d(i) +!!$ endif + end do + if (a%pl(1) /= 0) then + allocate(work(n_row),stat=info) + if (info /= 0) then + info=4000 + call psb_errpush(info,name) + goto 9999 + end if + call psb_gelp('n',a%pl,p%d,desc_a,info) + if(info /= 0) then + info=4010 + ch_err='psb_zgelp' + call psb_errpush(info,name,a_err=ch_err) + goto 9999 + end if + + deallocate(work) + endif + + if (debug) then + allocate(gd(mglob),stat=info) + if (info /= 0) then + call psb_errpush(4010,name,a_err='Allocate') + goto 9999 + end if + + call psb_gather(gd, p%d, desc_a, info, iroot=iroot) + if(info /= 0) then + info=4010 + ch_err='psb_zgatherm' + call psb_errpush(info,name,a_err=ch_err) + goto 9999 + end if + + if (me.eq.iroot) then + write(iout+np,*) 'VDIAG CHECK ',mglob + do i=1,mglob + write(iout+np,*) i,gd(i) + enddo + endif + deallocate(gd) + endif + if (debug) write(*,*) 'Preconditioner DIAG computed OK' + + + call psb_erractionrestore(err_act) + return + +9999 continue + call psb_erractionrestore(err_act) + if (err_act.eq.act_abort) then + call psb_error() + return + end if + return + +end subroutine psb_zdiagsc_bld +