!!$ !!$ 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. 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File: psb_cdren.f90 ! ! Subroutine: psb_cdren ! Updates a communication descriptor according to a renumbering scheme. ! ! Parameters: ! trans - character. Whether iperm or its transpose should be applied. ! iperm - integer,dimension(:). The renumbering scheme. ! desc_a - type(). The communication descriptor to be updated. ! info - integer. Eventually returns an error code. ! subroutine psb_cdren(trans,iperm,desc_a,info) use psb_descriptor_type use psb_const_mod use psb_error_mod use psb_penv_mod use psb_string_mod implicit none interface isaperm logical function isaperm(n,ip) integer, intent(in) :: n integer, intent(inout) :: ip(*) end function isaperm end interface !...parameters.... type(psb_desc_type), intent(inout) :: desc_a integer, intent(inout) :: iperm(:) character, intent(in) :: trans integer, intent(out) :: info !....locals.... integer :: i,j,np,me, n_col, kh, nh integer :: dectype integer :: ictxt,n_row, int_err(5), err_act real(kind(1.d0)) :: time(10), real_err(6) logical, parameter :: debug=.false. character(len=20) :: name if(psb_get_errstatus() /= 0) return info=0 call psb_erractionsave(err_act) name = 'psb_dcren' time(1) = psb_wtime() ictxt = psb_cd_get_context(desc_a) dectype = psb_cd_get_dectype(desc_a) n_row = psb_cd_get_local_rows(desc_a) n_col = psb_cd_get_local_cols(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 if (.not.psb_is_asb_desc(desc_a)) then info = 600 int_err(1) = dectype call psb_errpush(info,name,int_err) goto 9999 endif if (iperm(1) /= 0) then if (.not.isaperm(n_row,iperm)) then info = 610 int_err(1) = iperm(1) call psb_errpush(info,name,int_err) goto 9999 endif endif if (debug) write (*, *) ' begin matrix assembly...' !check on errors encountered in psdspins if ((iperm(1) /= 0)) then if (debug) write(0,*) 'spasb: here we go with ',iperm(1) deallocate(desc_a%lprm) allocate(desc_a%lprm(n_col)) if (toupper(trans) == 'N') then do i=1, n_row desc_a%lprm(iperm(i)) = i enddo do i=n_row+1,n_col desc_a%lprm(i) = i enddo else if (toupper(trans) == 'T') then do i=1, n_row desc_a%lprm(i) = iperm(i) enddo do i=n_row+1,n_col desc_a%lprm(i) = i enddo endif ! crossed fingers..... ! fix glob_to_loc/loc_to_glob mappings, then indices lists ! hmm, maybe we should just moe all of this onto a different level, ! have a specialized subroutine, and do it in the solver context???? if (debug) write(0,*) 'spasb: renumbering glob_to_loc' do i=1, n_col desc_a%glob_to_loc(desc_a%loc_to_glob(desc_a%lprm(i))) = i enddo if (debug) write(0,*) 'spasb: renumbering loc_to_glob' do i=1,psb_cd_get_global_rows(desc_a) j = desc_a%glob_to_loc(i) if (j>0) then desc_a%loc_to_glob(j) = i endif enddo if (debug) write(0,*) 'spasb: renumbering halo_index' i=1 kh=desc_a%halo_index(i) do while (kh /= -1) i = i+1 nh = desc_a%halo_index(i) do j = i+1, i+nh desc_a%halo_index(j) = & &desc_a%lprm(desc_a%halo_index(j)) enddo i = i + nh + 1 nh = desc_a%halo_index(i) do j= i+1, i+nh desc_a%halo_index(j) = & &desc_a%lprm(desc_a%halo_index(j)) enddo i = i + nh + 1 kh=desc_a%halo_index(i) enddo if (debug) write(0,*) 'spasb: renumbering ovrlap_index' i=1 kh=desc_a%ovrlap_index(i) do while (kh /= -1) i = i + 1 nh = desc_a%ovrlap_index(i) do j= i+1, i+nh desc_a%ovrlap_index(j) = & &desc_a%lprm(desc_a%ovrlap_index(j)) enddo i = i + nh + 1 kh=desc_a%ovrlap_index(i) enddo if (debug) write(0,*) 'spasb: renumbering ovrlap_elem' i = 1 kh=desc_a%ovrlap_elem(i) do while (kh /= -1) desc_a%ovrlap_elem(i) = & &desc_a%lprm(desc_a%ovrlap_elem(i)) i = i+2 kh=desc_a%ovrlap_elem(i) enddo if (debug) write(0,*) 'spasb: done renumbering' if (debug) then write(60+me,*) 'n_row ',n_row,' n_col',n_col, ' trans: ',trans do i=1,n_col write(60+me,*)i, ' lprm ', desc_a%lprm(i), ' iperm',iperm(i) enddo i=1 kh = desc_a%halo_index(i) do while (kh /= -1) write(60+me,*) i, kh i = i+1 kh = desc_a%halo_index(i) enddo close(60+me) end if !!$ iperm(1) = 0 else !!$ allocate(desc_a%lprm(1)) !!$ desc_a%lprm(1) = 0 endif time(4) = psb_wtime() time(4) = time(4) - time(3) if (debug) then call psb_amx(ictxt, time(4)) write (*, *) ' comm structs assembly: ', time(4)*1.d-3 end if call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_ret_) then return else call psb_error(ictxt) end if return end subroutine psb_cdren