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.
psblas3/prec/psb_s_diagprec.f90

270 lines
7.8 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
procedure, pass(prec) :: get_nzeros => psb_s_diag_get_nzeros
end type psb_s_diag_prec_type
private :: 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_get_nzeros
interface
subroutine psb_s_diag_apply_vect(alpha,prec,x,beta,y,desc_data,info,trans,work)
import :: psb_ipk_, psb_desc_type, psb_s_diag_prec_type, psb_s_vect_type, psb_spk_
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(psb_ipk_), intent(out) :: info
character(len=1), optional :: trans
real(psb_spk_),intent(inout), optional, target :: work(:)
end subroutine psb_s_diag_apply_vect
end interface
interface
subroutine psb_s_diag_apply(alpha,prec,x,beta,y,desc_data,info,trans,work)
import :: psb_ipk_, psb_desc_type, psb_s_diag_prec_type, psb_s_vect_type, psb_spk_
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(psb_ipk_), intent(out) :: info
character(len=1), optional :: trans
real(psb_spk_),intent(inout), optional, target :: work(:)
end subroutine psb_s_diag_apply
end interface
interface
subroutine psb_s_diag_precbld(a,desc_a,prec,info,upd,amold,afmt,vmold)
import :: psb_ipk_, psb_desc_type, psb_s_diag_prec_type, psb_s_vect_type, psb_spk_, &
& psb_sspmat_type, psb_s_base_sparse_mat, psb_s_base_vect_type
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(psb_ipk_), 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
end subroutine psb_s_diag_precbld
end interface
contains
subroutine psb_s_diag_precinit(prec,info)
Implicit None
class(psb_s_diag_prec_type),intent(inout) :: prec
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: 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_precseti(prec,what,val,info)
Implicit None
class(psb_s_diag_prec_type),intent(inout) :: prec
integer(psb_ipk_), intent(in) :: what
integer(psb_ipk_), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: 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)
Implicit None
class(psb_s_diag_prec_type),intent(inout) :: prec
integer(psb_ipk_), intent(in) :: what
real(psb_spk_), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: 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)
Implicit None
class(psb_s_diag_prec_type),intent(inout) :: prec
integer(psb_ipk_), intent(in) :: what
character(len=*), intent(in) :: val
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: 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)
Implicit None
class(psb_s_diag_prec_type), intent(inout) :: prec
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: 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)
Implicit None
class(psb_s_diag_prec_type), intent(in) :: prec
integer(psb_ipk_), intent(in), optional :: iout
integer(psb_ipk_) :: err_act, nrow, info
character(len=20) :: name='s_diag_precdescr'
integer(psb_ipk_) :: 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)
class(psb_s_diag_prec_type), intent(in) :: prec
integer(psb_long_int_k_) :: val
val = psb_sizeof_sp * prec%get_nzeros()
return
end function psb_s_diag_sizeof
function psb_s_diag_get_nzeros(prec) result(val)
class(psb_s_diag_prec_type), intent(in) :: prec
integer(psb_long_int_k_) :: val
val = 0
if (allocated(prec%dv)) val = val + prec%dv%get_nrows()
return
end function psb_s_diag_get_nzeros
end module psb_s_diagprec