You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
494 lines
13 KiB
Fortran
494 lines
13 KiB
Fortran
module psb_s_diagprec
|
|
|
|
use psb_s_base_prec_mod
|
|
|
|
type, extends(psb_s_base_prec_type) :: psb_s_diag_prec_type
|
|
real(psb_spk_), allocatable :: d(:)
|
|
type(psb_s_vect_type), allocatable :: dv
|
|
contains
|
|
procedure, pass(prec) :: s_apply_v => psb_s_diag_apply_vect
|
|
procedure, pass(prec) :: s_apply => psb_s_diag_apply
|
|
procedure, pass(prec) :: precbld => psb_s_diag_precbld
|
|
procedure, pass(prec) :: precinit => psb_s_diag_precinit
|
|
procedure, pass(prec) :: precseti => psb_s_diag_precseti
|
|
procedure, pass(prec) :: precsetr => psb_s_diag_precsetr
|
|
procedure, pass(prec) :: precsetc => psb_s_diag_precsetc
|
|
procedure, pass(prec) :: precfree => psb_s_diag_precfree
|
|
procedure, pass(prec) :: precdescr => psb_s_diag_precdescr
|
|
procedure, pass(prec) :: sizeof => psb_s_diag_sizeof
|
|
end type psb_s_diag_prec_type
|
|
|
|
private :: psb_s_diag_apply, psb_s_diag_precbld, psb_s_diag_precseti,&
|
|
& psb_s_diag_precsetr, psb_s_diag_precsetc, psb_s_diag_sizeof,&
|
|
& psb_s_diag_precinit, psb_s_diag_precfree, psb_s_diag_precdescr,&
|
|
& psb_s_diag_apply_vect
|
|
|
|
|
|
contains
|
|
|
|
|
|
subroutine psb_s_diag_apply_vect(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(inout) :: prec
|
|
type(psb_s_vect_type),intent(inout) :: x
|
|
real(psb_spk_),intent(in) :: alpha, beta
|
|
type(psb_s_vect_type),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='d_diag_prec_apply'
|
|
real(psb_spk_), pointer :: ww(:)
|
|
class(psb_s_base_vect_type), allocatable :: dw
|
|
|
|
call psb_erractionsave(err_act)
|
|
|
|
!
|
|
! This is the base version and we should throw an error.
|
|
! Or should it be the DIAG preonditioner???
|
|
!
|
|
info = psb_success_
|
|
|
|
nrow = desc_data%get_local_rows()
|
|
if (x%get_nrows() < nrow) then
|
|
info = 36
|
|
call psb_errpush(info,name,i_err=(/2,nrow,0,0,0/))
|
|
goto 9999
|
|
end if
|
|
if (y%get_nrows() < 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) >= x%get_nrows()) then
|
|
ww => work
|
|
else
|
|
allocate(ww(x%get_nrows()),stat=info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_alloc_request_,name,&
|
|
& i_err=(/x%get_nrows(),0,0,0,0/),a_err='real(psb_spk_)')
|
|
goto 9999
|
|
end if
|
|
end if
|
|
|
|
!!$ allocate(dw, mold=x, stat=info)
|
|
!!$ call dw%bld(x%get_nrows())
|
|
!!$ if (.true.) then
|
|
!!$ if (info == 0) call dw%mlt(prec%dv,x,info)
|
|
!!$ else
|
|
!!$ if (info == 0) call dw%axpby(nrow,done,x,dzero,info)
|
|
!!$ if (info == 0) call dw%mlt(prec%dv,info)
|
|
!!$ end if
|
|
!!$ if (info == 0) call y%axpby(nrow,alpha,dw,beta,info)
|
|
|
|
call y%mlt(alpha,prec%dv,x,beta,info)
|
|
|
|
!!$ call x%mlt(ww,prec%d(1:nrow),info)
|
|
!!$ if (info == 0) call psb_geaxpby(alpha,ww,beta,y,desc_data,info)
|
|
|
|
!!$ call dw%free(info)
|
|
!!$ if (info /= psb_success_) then
|
|
!!$ call psb_errpush(psb_err_from_subroutine_,name,a_err='Deallocate')
|
|
!!$ goto 9999
|
|
!!$ end if
|
|
|
|
if (size(work) < x%get_nrows()) then
|
|
deallocate(ww,stat=info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,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 psb_s_diag_apply_vect
|
|
|
|
|
|
subroutine psb_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(inout) :: 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 :: trans_
|
|
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 = psb_success_
|
|
|
|
nrow = desc_data%get_local_rows()
|
|
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 (present(trans)) then
|
|
trans_ = psb_toupper(trans)
|
|
else
|
|
trans_='N'
|
|
end if
|
|
|
|
select case(trans_)
|
|
case('N')
|
|
case('T','C')
|
|
case default
|
|
info=psb_err_iarg_invalid_i_
|
|
call psb_errpush(info,name,&
|
|
& i_err=(/6,0,0,0,0/),a_err=trans_)
|
|
goto 9999
|
|
end select
|
|
|
|
if (size(work) >= size(x)) then
|
|
ww => work
|
|
else
|
|
allocate(ww(size(x)),stat=info)
|
|
if (info /= psb_success_) then
|
|
call psb_errpush(psb_err_alloc_request_,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 /= psb_success_) then
|
|
call psb_errpush(psb_err_from_subroutine_,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 psb_s_diag_apply
|
|
|
|
subroutine psb_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 = psb_success_
|
|
|
|
|
|
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 psb_s_diag_precinit
|
|
|
|
|
|
subroutine psb_s_diag_precbld(a,desc_a,prec,info,upd,amold,afmt,vmold)
|
|
|
|
use psb_base_mod
|
|
Implicit None
|
|
|
|
type(psb_sspmat_type), 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
|
|
character(len=*), intent(in), optional :: afmt
|
|
class(psb_s_base_sparse_mat), intent(in), optional :: amold
|
|
class(psb_s_base_vect_type), intent(in), optional :: vmold
|
|
Integer :: err_act, nrow,i
|
|
character(len=20) :: name='s_diag_precbld'
|
|
|
|
call psb_erractionsave(err_act)
|
|
|
|
info = psb_success_
|
|
nrow = desc_a%get_local_cols()
|
|
if (allocated(prec%d)) then
|
|
if (size(prec%d) < nrow) then
|
|
deallocate(prec%d,stat=info)
|
|
end if
|
|
end if
|
|
if ((info == psb_success_).and.(.not.allocated(prec%d))) then
|
|
allocate(prec%d(nrow), stat=info)
|
|
end if
|
|
if (info /= psb_success_) then
|
|
info = psb_err_alloc_dealloc_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
call a%get_diag(prec%d,info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_from_subroutine_
|
|
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
|
|
allocate(prec%dv,stat=info)
|
|
if (info == 0) then
|
|
if (present(vmold)) then
|
|
allocate(prec%dv%v,mold=vmold,stat=info)
|
|
else
|
|
allocate(psb_s_base_vect_type :: prec%dv%v,stat=info)
|
|
end if
|
|
end if
|
|
if (info == 0) then
|
|
call prec%dv%bld(prec%d)
|
|
else
|
|
write(0,*) 'Error on precbld ',info
|
|
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 psb_s_diag_precbld
|
|
|
|
subroutine psb_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 = psb_success_
|
|
|
|
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 psb_s_diag_precseti
|
|
|
|
subroutine psb_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 = psb_success_
|
|
|
|
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 psb_s_diag_precsetr
|
|
|
|
subroutine psb_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 = psb_success_
|
|
|
|
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 psb_s_diag_precsetc
|
|
|
|
subroutine psb_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 = psb_success_
|
|
|
|
if (allocated(prec%dv)) call prec%dv%free(info)
|
|
|
|
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 psb_s_diag_precfree
|
|
|
|
|
|
subroutine psb_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 = psb_success_
|
|
|
|
if (present(iout)) then
|
|
iout_ = iout
|
|
else
|
|
iout_ = 6
|
|
end if
|
|
|
|
write(iout_,*) 'Diagonal scaling'
|
|
|
|
call psb_erractionsave(err_act)
|
|
|
|
info = psb_success_
|
|
|
|
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 psb_s_diag_precdescr
|
|
|
|
function psb_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 psb_s_diag_sizeof
|
|
|
|
end module psb_s_diagprec
|