module psb_s_diagprec use psb_prec_type type, extends(psb_s_base_prec_type) :: psb_s_diag_prec_type real(psb_spk_), allocatable :: d(:) contains procedure, pass(prec) :: apply => s_diag_apply procedure, pass(prec) :: precbld => s_diag_precbld procedure, pass(prec) :: precinit => s_diag_precinit procedure, pass(prec) :: s_base_precseti => s_diag_precseti procedure, pass(prec) :: s_base_precsetr => s_diag_precsetr procedure, pass(prec) :: s_base_precsetc => s_diag_precsetc procedure, pass(prec) :: precfree => s_diag_precfree procedure, pass(prec) :: precdescr => s_diag_precdescr procedure, pass(prec) :: sizeof => s_diag_sizeof end type psb_s_diag_prec_type contains subroutine s_diag_apply(alpha,prec,x,beta,y,desc_data,info,trans,work) use psb_base_mod type(psb_desc_type),intent(in) :: desc_data class(psb_s_diag_prec_type), intent(in) :: prec real(psb_spk_),intent(in) :: x(:) real(psb_spk_),intent(in) :: alpha, beta real(psb_spk_),intent(inout) :: y(:) integer, intent(out) :: info character(len=1), optional :: trans real(psb_spk_),intent(inout), optional, target :: work(:) Integer :: err_act, nrow character(len=20) :: name='s_diag_prec_apply' real(psb_spk_), pointer :: ww(:) call psb_erractionsave(err_act) ! ! This is the base version and we should throw an error. ! Or should it be the DIAG preonditioner??? ! info = 0 nrow = psb_cd_get_local_rows(desc_data) if (size(x) < nrow) then info = 36 call psb_errpush(info,name,i_err=(/2,nrow,0,0,0/)) goto 9999 end if if (size(y) < nrow) then info = 36 call psb_errpush(info,name,i_err=(/3,nrow,0,0,0/)) goto 9999 end if if (.not.allocated(prec%d)) then info = 1124 call psb_errpush(info,name,a_err="preconditioner: D") goto 9999 end if if (size(prec%d) < nrow) then info = 1124 call psb_errpush(info,name,a_err="preconditioner: D") goto 9999 end if if (size(work) >= size(x)) then ww => work else allocate(ww(size(x)),stat=info) if (info /= 0) then call psb_errpush(4025,name,i_err=(/size(x),0,0,0,0/),a_err='real(psb_spk_)') goto 9999 end if end if ww(1:nrow) = x(1:nrow)*prec%d(1:nrow) call psb_geaxpby(alpha,ww,beta,y,desc_data,info) if (size(work) < size(x)) then deallocate(ww,stat=info) if (info /= 0) then call psb_errpush(4010,name,a_err='Deallocate') goto 9999 end if end if call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_apply subroutine s_diag_precinit(prec,info) use psb_base_mod Implicit None class(psb_s_diag_prec_type),intent(inout) :: prec integer, intent(out) :: info Integer :: err_act, nrow character(len=20) :: name='s_diag_precinit' call psb_erractionsave(err_act) info = 0 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_precinit subroutine s_diag_precbld(a,desc_a,prec,info,upd) use psb_base_mod Implicit None type(psb_s_sparse_mat), intent(in), target :: a type(psb_desc_type), intent(in), target :: desc_a class(psb_s_diag_prec_type),intent(inout) :: prec integer, intent(out) :: info character, intent(in), optional :: upd Integer :: err_act, nrow,i character(len=20) :: name='s_diag_precbld' call psb_erractionsave(err_act) info = 0 nrow = psb_cd_get_local_cols(desc_a) if (allocated(prec%d)) then if (size(prec%d) < nrow) then deallocate(prec%d,stat=info) end if end if if ((info == 0).and.(.not.allocated(prec%d))) then allocate(prec%d(nrow), stat=info) end if if (info /= 0) then info = 4000 call psb_errpush(info,name) goto 9999 end if call a%get_diag(prec%d,info) if (info /= 0) then info = 4010 call psb_errpush(info,name, a_err='get_diag') goto 9999 end if do i=1,nrow if (prec%d(i) == dzero) then prec%d(i) = done else prec%d(i) = done/prec%d(i) endif end do call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_precbld subroutine s_diag_precseti(prec,what,val,info) use psb_base_mod Implicit None class(psb_s_diag_prec_type),intent(inout) :: prec integer, intent(in) :: what integer, intent(in) :: val integer, intent(out) :: info Integer :: err_act, nrow character(len=20) :: name='s_diag_precset' call psb_erractionsave(err_act) info = 0 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_precseti subroutine s_diag_precsetr(prec,what,val,info) use psb_base_mod Implicit None class(psb_s_diag_prec_type),intent(inout) :: prec integer, intent(in) :: what real(psb_spk_), intent(in) :: val integer, intent(out) :: info Integer :: err_act, nrow character(len=20) :: name='s_diag_precset' call psb_erractionsave(err_act) info = 0 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_precsetr subroutine s_diag_precsetc(prec,what,val,info) use psb_base_mod Implicit None class(psb_s_diag_prec_type),intent(inout) :: prec integer, intent(in) :: what character(len=*), intent(in) :: val integer, intent(out) :: info Integer :: err_act, nrow character(len=20) :: name='s_diag_precset' call psb_erractionsave(err_act) info = 0 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_precsetc subroutine s_diag_precfree(prec,info) use psb_base_mod Implicit None class(psb_s_diag_prec_type), intent(inout) :: prec integer, intent(out) :: info Integer :: err_act, nrow character(len=20) :: name='s_diag_precset' call psb_erractionsave(err_act) info = 0 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_precfree subroutine s_diag_precdescr(prec,iout) use psb_base_mod Implicit None class(psb_s_diag_prec_type), intent(in) :: prec integer, intent(in), optional :: iout Integer :: err_act, nrow, info character(len=20) :: name='s_diag_precdescr' integer :: iout_ call psb_erractionsave(err_act) info = 0 if (present(iout)) then iout_ = iout else iout_ = 6 end if write(iout_,*) 'Diagonal scaling' call psb_erractionsave(err_act) info = 0 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine s_diag_precdescr function s_diag_sizeof(prec) result(val) use psb_base_mod class(psb_s_diag_prec_type), intent(in) :: prec integer(psb_long_int_k_) :: val val = 0 val = val + psb_sizeof_sp * size(prec%d) return end function s_diag_sizeof end module psb_s_diagprec