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.
123 lines
3.2 KiB
Fortran
123 lines
3.2 KiB
Fortran
! File: psb_dspalloc.f90
|
|
!
|
|
! Subroutine: psb_dspalloc
|
|
! Allocate sparse matrix structure for psblas routines.
|
|
!
|
|
! Parameters:
|
|
! a - type(<psb_dspmat_type>). The sparse matrix to be allocated.
|
|
! desc_a - type(<psb_desc_type>). The communication descriptor to be updated.
|
|
! info - integer. Eventually returns an error code.
|
|
! nnz - integer(optional). The number of nonzeroes in the matrix.
|
|
!
|
|
subroutine psb_dspalloc(a, desc_a, info, nnz)
|
|
|
|
use psb_descriptor_type
|
|
use psb_spmat_type
|
|
use psb_serial_mod
|
|
use psb_const_mod
|
|
use psb_error_mod
|
|
implicit none
|
|
|
|
!....parameters...
|
|
type(psb_desc_type), intent(inout) :: desc_a
|
|
type(psb_dspmat_type), intent(out) :: a
|
|
integer, intent(out) :: info
|
|
integer, optional, intent(in) :: nnz
|
|
|
|
!locals
|
|
integer :: icontxt, dectype
|
|
integer :: nprow,npcol,myrow,mycol,loc_row,&
|
|
& length_ia1,length_ia2,err,nprocs, err_act,m,n
|
|
integer :: int_err(5),temp(1)
|
|
real(kind(1.d0)) :: real_err(5)
|
|
logical, parameter :: debug=.false.
|
|
character(len=20) :: name, ch_err
|
|
|
|
if(psb_get_errstatus().ne.0) return
|
|
info=0
|
|
call psb_erractionsave(err_act)
|
|
name = 'psb_dspalloc'
|
|
|
|
icontxt = desc_a%matrix_data(psb_ctxt_)
|
|
dectype=desc_a%matrix_data(psb_dec_type_)
|
|
call blacs_gridinfo(icontxt, nprow, npcol, myrow, mycol)
|
|
! ....verify blacs grid correctness..
|
|
if (nprow.eq.-1) then
|
|
info = 2010
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
else if (npcol.ne.1) then
|
|
info = 2030
|
|
int_err(1) = npcol
|
|
call psb_errpush(info,name,int_err)
|
|
goto 9999
|
|
endif
|
|
|
|
!
|
|
! hmm, not a good idea, not all compilers can rely on any given
|
|
! value for non initialized pointers. let's avoid this,
|
|
! and just rely on documentation.
|
|
! check if psdalloc is already called for this matrix
|
|
|
|
! set fields in desc_a%matrix_data....
|
|
loc_row = desc_a%matrix_data(psb_n_row_)
|
|
m = desc_a%matrix_data(psb_m_)
|
|
n = desc_a%matrix_data(psb_n_)
|
|
|
|
!...allocate matrix data...
|
|
if (present(nnz))then
|
|
if (nnz.lt.0) then
|
|
info=45
|
|
int_err(1)=7
|
|
int_err(2)=nnz
|
|
call psb_errpush(info,name,int_err)
|
|
goto 9999
|
|
endif
|
|
length_ia1=nnz
|
|
length_ia2=nnz
|
|
else
|
|
length_ia1=max(1,4*loc_row)
|
|
length_ia2=max(1,4*loc_row)
|
|
endif
|
|
|
|
if (debug) write(*,*) 'allocating size:',length_ia1
|
|
|
|
!....allocate aspk, ia1, ia2.....
|
|
call psb_spall(loc_row,loc_row,a,length_ia1,info)
|
|
if(info.ne.0) then
|
|
info=4010
|
|
ch_err='spreall'
|
|
call psb_errpush(info,name,int_err)
|
|
goto 9999
|
|
end if
|
|
|
|
! set permutation matrices
|
|
a%pl(1)=0
|
|
a%pr(1)=0
|
|
! set infoa fields
|
|
a%fida = 'COO'
|
|
a%descra = 'GUN'
|
|
a%infoa(psb_nnz_) = 0
|
|
a%infoa(psb_srtd_) = 0
|
|
a%infoa(psb_state_) = psb_spmat_bld_
|
|
|
|
if (debug) write(0,*) 'spall: ', &
|
|
&desc_a%matrix_data(psb_dec_type_),psb_desc_bld_
|
|
desc_a%matrix_data(psb_dec_type_) = psb_desc_bld_
|
|
return
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
|
|
if (err_act.eq.act_ret) then
|
|
return
|
|
else
|
|
call psb_error(icontxt)
|
|
end if
|
|
return
|
|
|
|
end subroutine psb_dspalloc
|