!!$ !!$ 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_zspgtblk.f90 ! Subroutine: psb_zspgtblk ! Gets one or more rows from a sparse matrix. ! Parameters: !***************************************************************************** !* * !* Takes a specified row from matrix A and copies into matrix B (possibly * !* appending to B). Output is always COO. Input might be anything, once * !* we get to actually write the code..... * !* * !***************************************************************************** subroutine psb_zspgtblk(irw,a,b,info,append,iren,lrw) ! Output is always in COO format into B, irrespective of ! the input format use psb_spmat_type use psb_const_mod implicit none type(psb_zspmat_type), intent(in) :: a integer, intent(in) :: irw type(psb_zspmat_type), intent(inout) :: b integer,intent(out) :: info logical, intent(in), optional :: append integer, intent(in), target, optional :: iren(:) integer, intent(in), optional :: lrw logical :: append_ integer, pointer :: iren_(:) integer :: i,j,k,ip,jp,nr,idx, nz,iret,nzb, nza, lrw_, irw_, err_act character(len=20) :: name, ch_err name='psb_spgtblk' info = 0 call psb_erractionsave(err_act) irw_ = irw if (present(lrw)) then lrw_ = lrw else lrw_ = irw endif if (lrw_ < irw) then write(0,*) 'SPGTBLK input error: fixing lrw',irw,lrw_ lrw_ = irw end if if (present(append)) then append_=append else append_=.false. endif if (present(iren)) then iren_=>iren else iren_ => null() end if if (append_) then nzb = b%infoa(psb_nnz_) else nzb = 0 b%m = 0 b%k = 0 endif if (a%fida == 'CSR') then call csr_zspgtblk(irw_,a,b,append_,iren_,lrw_) else if (a%fida == 'COO') then call coo_zspgtblk(irw_,a,b,append_,iren_,lrw_) else if (a%fida == 'JAD') then call jad_zspgtblk(irw_,a,b,append_,iren_,lrw_) else info=136 ch_err=a%fida(1:3) call psb_errpush(info,name,a_err=ch_err) goto 9999 end if call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.psb_act_abort_) then call psb_error() return end if return contains subroutine csr_zspgtblk(irw,a,b,append,iren,lrw) use psb_spmat_type use psb_const_mod implicit none type(psb_zspmat_type), intent(in) :: a integer :: irw type(psb_zspmat_type), intent(inout) :: b logical, intent(in) :: append integer, pointer :: iren(:) integer :: lrw integer :: idx,i,j ,nr,nz,nzb, row_idx integer, pointer :: indices(:) if (append) then nzb = b%infoa(psb_nnz_) else nzb = 0 endif if (a%pl(1) /= 0) then nr = lrw - irw + 1 allocate(indices(nr)) nz = 0 do i=1,nr indices(i)=a%pl(irw+i-1) nz=nz+a%ia2(indices(i)+1)-a%ia2(indices(i)) end do if (min(size(b%ia1),size(b%ia2),size(b%aspk)) < nzb+nz) then call psb_sp_reall(b,nzb+nz,iret) endif k=0 if(associated(iren)) then do i=1,nr row_idx=indices(i) do j=a%ia2(row_idx),a%ia2(row_idx+1)-1 k = k + 1 b%aspk(nzb+k) = a%aspk(j) b%ia1(nzb+k) = iren(row_idx) b%ia2(nzb+k) = iren(a%ia1(j)) end do end do else do i=1,nr row_idx=indices(i) do j=a%ia2(row_idx),a%ia2(row_idx+1)-1 k = k + 1 b%aspk(nzb+k) = a%aspk(j) b%ia1(nzb+k) = row_idx b%ia2(nzb+k) = a%ia1(j) end do end do end if b%infoa(psb_nnz_) = nzb+k b%m = b%m+nr b%k = max(b%k,a%k) else idx = irw if (idx<0) then write(0,*) ' spgtblk Error : idx no good ',idx return end if nr = lrw - irw + 1 nz = a%ia2(idx+nr) - a%ia2(idx) if (min(size(b%ia1),size(b%ia2),size(b%aspk)) < nzb+nz) then call psb_sp_reall(b,nzb+nz,iret) endif b%fida='COO' if (associated(iren)) then k=0 do i=irw,lrw do j=a%ia2(i),a%ia2(i+1)-1 k = k + 1 b%aspk(nzb+k) = a%aspk(j) b%ia1(nzb+k) = iren(i) b%ia2(nzb+k) = iren(a%ia1(j)) end do enddo else k=0 do i=irw,lrw do j=a%ia2(i),a%ia2(i+1)-1 k = k + 1 b%ia1(nzb+k) = i b%ia2(nzb+k) = a%ia1(j) b%aspk(nzb+k) = a%aspk(j) !!$ write(0,*) 'csr_gtblk: in:',a%aspk(j),i,a%ia1(j) end do enddo end if b%infoa(psb_nnz_) = nzb+nz if (a%pr(1) /= 0) then write(0,*) 'Feeling lazy today, Right Permutation will have to wait' endif b%m = b%m+lrw-irw+1 b%k = max(b%k,a%k) endif end subroutine csr_zspgtblk subroutine coo_zspgtblk(irw,a,b,append,iren,lrw) use psb_spmat_type use psb_const_mod implicit none type(psb_zspmat_type), intent(in) :: a integer :: irw type(psb_zspmat_type), intent(inout) :: b logical, intent(in) :: append integer, pointer :: iren(:) integer :: lrw nza = a%infoa(psb_nnz_) if (a%pl(1) /= 0) then write(0,*) 'Fatal error in SPGTBLK: do not feed a permuted mat so far!' idx = -1 else idx = irw endif if (idx<0) then write(0,*) ' spgtblk Error : idx no good ',idx return end if if (a%infoa(psb_srtd_) == psb_isrtdcoo_) then ! In this case we can do a binary search. do call ibsrch(ip,irw,nza,a%ia1) if (ip /= -1) exit irw = irw + 1 if (irw > lrw) then write(0,*) 'Warning : did not find any rows. Is this an error? ',irw,lrw,idx exit end if end do if (ip /= -1) then ! expand [ip,jp] to contain all row entries. do if (ip < 2) exit if (a%ia1(ip-1) == irw) then ip = ip -1 else exit end if end do end if do call ibsrch(jp,lrw,nza,a%ia1) if (jp /= -1) exit lrw = lrw - 1 if (irw > lrw) then write(0,*) 'Warning : did not find any rows. Is this an error?' exit end if end do if (jp /= -1) then ! expand [ip,jp] to contain all row entries. do if (jp == nza) exit if (a%ia1(jp+1) == lrw) then jp = jp + 1 else exit end if end do end if if ((ip /= -1) .and.(jp /= -1)) then ! Now do the copy. nz = jp - ip +1 if (size(b%ia1) < nzb+nz) then call psb_sp_reall(b,nzb+nz,iret) endif b%fida='COO' if (associated(iren)) then do i=ip,jp nzb = nzb + 1 b%aspk(nzb) = a%aspk(i) b%ia1(nzb) = iren(a%ia1(i)) b%ia2(nzb) = iren(a%ia2(i)) enddo else do i=ip,jp nzb = nzb + 1 b%aspk(nzb) = a%aspk(i) b%ia1(nzb) = a%ia1(i) b%ia2(nzb) = a%ia2(i) enddo end if end if else nz = (nza*(lrw-irw+1))/max(a%m,1) if (size(b%ia1) < nzb+nz) then call psb_sp_reall(b,nzb+nz,iret) endif if (associated(iren)) then k = 0 do i=1,a%infoa(psb_nnz_) if ((a%ia1(i)>=irw).and.(a%ia1(i)<=lrw)) then k = k + 1 if (k > nz) then nz = k call psb_sp_reall(b,nzb+nz,iret) end if b%aspk(nzb+k) = a%aspk(i) b%ia1(nzb+k) = iren(a%ia1(i)) b%ia2(nzb+k) = iren(a%ia2(i)) endif enddo else k = 0 do i=1,a%infoa(psb_nnz_) if ((a%ia1(i)>=irw).and.(a%ia1(i)<=lrw)) then k = k + 1 if (k > nz) then nz = k call psb_sp_reall(b,nzb+nz,iret) end if b%aspk(nzb+k) = a%aspk(i) b%ia1(nzb+k) = (a%ia1(i)) b%ia2(nzb+k) = (a%ia2(i)) endif enddo nzb=nzb+k end if end if b%infoa(psb_nnz_) = nzb b%m = b%m+lrw-irw+1 b%k = max(b%k,a%k) end subroutine coo_zspgtblk subroutine jad_zspgtblk(irw,a,b,append,iren,lrw) type(psb_zspmat_type), intent(in),target :: a integer :: irw type(psb_zspmat_type), intent(inout) :: b logical, intent(in) :: append integer, pointer :: iren(:) integer :: lrw integer, pointer :: ia1(:), ia2(:), ia3(:),& & ja(:), ka(:), indices(:), blks(:) integer :: png, pia, pja, ipx, blk, rb, row, k_pt, npg, col, ng png = a%ia2(1) ! points to the number of blocks pia = a%ia2(2) ! points to the beginning of ia(3,png) pja = a%ia2(3) ! points to the beginning of ja(:) ng = a%ia2(png) ! the number of blocks ja => a%ia2(pja:) ! the array containing the pointers to ka and aspk ka => a%ia1(:) ! the array containing the column indices ia1 => a%ia2(pia:pja-1:3) ! the array containing the first row index of each block ia2 => a%ia2(pia+1:pja-1:3) ! the array containing a pointer to the pos. in ja to the first jad column ia3 => a%ia2(pia+2:pja-1:3) ! the array containing a pointer to the pos. in ja to the first csr column if (append) then nzb = b%infoa(psb_nnz_) else nzb = 0 endif if (a%pl(1) /= 0) then nr = lrw - irw + 1 allocate(indices(nr),blks(nr)) nz = 0 do i=1,nr indices(i)=a%pl(irw+i-1) j=0 blkfnd: do j=j+1 if(ia1(j).eq.indices(i)) then blks(i)=j nz=nz+ia3(j)-ia2(j) ipx = ia1(j) ! the first row index of the block rb = indices(i)-ipx ! the row offset within the block row = ia3(j)+rb nz = nz+ja(row+1)-ja(row) exit blkfnd else if(ia1(j).gt.indices(i)) then blks(i)=j-1 nz=nz+ia3(j-1)-ia2(j-1) ipx = ia1(j-1) ! the first row index of the block rb = indices(i)-ipx ! the row offset within the block row = ia3(j-1)+rb nz = nz+ja(row+1)-ja(row) exit blkfnd end if end do blkfnd end do if (size(b%ia1) < nzb+nz) then call psb_sp_reall(b,nzb+nz,iret) endif k=0 ! cycle over rows do i=1,nr ! find which block the row belongs to blk = blks(i) ! extract first part of the row from the jad block ipx = ia1(blk) ! the first row index of the block k_pt= ia2(blk) ! the pointer to the beginning of a column in ja rb = indices(i)-ipx ! the row offset within the block npg = ja(k_pt+1)-ja(k_pt) ! the number of rows in the block if(associated(iren))then do col = ia2(blk), ia3(blk)-1 k=k+1 b%aspk(nzb+k) = a%aspk(ja(col)+rb) b%ia1(nzb+k) = iren(irw+i-1) b%ia2(nzb+k) = iren(ka(ja(col)+rb)) end do else do col = ia2(blk), ia3(blk)-1 k=k+1 b%aspk(nzb+k) = a%aspk(ja(col)+rb) b%ia1(nzb+k) = irw+i-1 b%ia2(nzb+k) = ka(ja(col)+rb) end do end if ! extract second part of the row from the csr tail row=ia3(blk)+rb if(associated(iren))then do j=ja(row), ja(row+1)-1 k=k+1 b%aspk(nzb+k) = a%aspk(j) b%ia1(nzb+k) = iren(irw+i-1) b%ia2(nzb+k) = iren(ka(j)) end do else do j=ja(row), ja(row+1)-1 k=k+1 b%aspk(nzb+k) = a%aspk(j) b%ia1(nzb+k) = irw+i-1 b%ia2(nzb+k) = ka(j) end do end if end do b%infoa(psb_nnz_) = nzb+k b%m = b%m+lrw-irw+1 b%k = max(b%k,a%k) b%fida='COO' else ! There might be some problems info=134 ch_err=a%fida(1:3) call psb_errpush(info,name,a_err=ch_err) end if end subroutine jad_zspgtblk end subroutine psb_zspgtblk