|
|
|
|
!!$
|
|
|
|
|
!!$ Parallel Sparse BLAS version 3.1
|
|
|
|
|
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010, 2012, 2013
|
|
|
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
|
|
|
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
|
|
|
|
|
!!$
|
|
|
|
|
!!$ 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. The name of the PSBLAS group or the names of its contributors may
|
|
|
|
|
!!$ not be used to endorse or promote products derived from this
|
|
|
|
|
!!$ software without specific written permission.
|
|
|
|
|
!!$
|
|
|
|
|
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
|
|
|
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
|
|
|
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
|
|
|
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
|
|
|
|
|
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
|
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
|
|
|
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
|
|
|
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
|
|
|
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
|
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
|
|
|
!!$ POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
!!$
|
|
|
|
|
!!$
|
|
|
|
|
! File: psb_znrm1.f90
|
|
|
|
|
!
|
|
|
|
|
! Function: psb_znrm1
|
|
|
|
|
! Forms the norm1 of a sparse matrix,
|
|
|
|
|
!
|
|
|
|
|
! norm1 := max_j(sum(abs(A(:,j))))
|
|
|
|
|
!
|
|
|
|
|
! Arguments:
|
|
|
|
|
! a - type(psb_zspmat_type). The sparse matrix containing A.
|
|
|
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
|
|
|
! info - integer. Return code
|
|
|
|
|
!
|
|
|
|
|
function psb_zspnrm1(a,desc_a,info) result(res)
|
|
|
|
|
use psb_base_mod, psb_protect_name => psb_zspnrm1
|
|
|
|
|
implicit none
|
|
|
|
|
|
|
|
|
|
type(psb_zspmat_type), intent(in) :: a
|
|
|
|
|
integer(psb_ipk_), intent(out) :: info
|
|
|
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
|
|
|
real(psb_dpk_) :: res
|
|
|
|
|
|
|
|
|
|
! locals
|
|
|
|
|
integer(psb_ipk_) :: ictxt, np, me, nr,nc,&
|
|
|
|
|
& err_act, n, iia, jja, ia, ja, mdim, ndim, m
|
|
|
|
|
character(len=20) :: name, ch_err
|
|
|
|
|
real(psb_dpk_), allocatable :: v(:)
|
|
|
|
|
|
|
|
|
|
name='psb_zspnrm1'
|
|
|
|
|
if (psb_errstatus_fatal()) return
|
|
|
|
|
info=psb_success_
|
|
|
|
|
call psb_erractionsave(err_act)
|
|
|
|
|
|
|
|
|
|
ictxt=desc_a%get_context()
|
|
|
|
|
|
|
|
|
|
call psb_info(ictxt, me, np)
|
|
|
|
|
if (np == -1) then
|
|
|
|
|
info = psb_err_context_error_
|
|
|
|
|
call psb_errpush(info,name)
|
|
|
|
|
goto 9999
|
|
|
|
|
endif
|
|
|
|
|
|
|
|
|
|
ia = 1
|
|
|
|
|
ja = 1
|
|
|
|
|
m = desc_a%get_global_rows()
|
|
|
|
|
n = desc_a%get_global_cols()
|
|
|
|
|
nr = desc_a%get_local_rows()
|
|
|
|
|
nc = desc_a%get_local_cols()
|
|
|
|
|
|
|
|
|
|
call psb_chkmat(m,n,ia,ja,desc_a,info,iia,jja)
|
|
|
|
|
if(info /= psb_success_) then
|
|
|
|
|
info=psb_err_from_subroutine_
|
|
|
|
|
ch_err='psb_chkmat'
|
|
|
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
|
|
|
goto 9999
|
|
|
|
|
end if
|
|
|
|
|
|
|
|
|
|
if ((iia /= 1).or.(jja /= 1)) then
|
|
|
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
|
|
|
call psb_errpush(info,name)
|
|
|
|
|
goto 9999
|
|
|
|
|
end if
|
|
|
|
|
|
|
|
|
|
call psb_geall(v,desc_a,info)
|
|
|
|
|
if(info == psb_success_) then
|
|
|
|
|
v = zzero
|
|
|
|
|
call psb_geasb(v,desc_a,info)
|
|
|
|
|
end if
|
|
|
|
|
if(info /= psb_success_) then
|
|
|
|
|
info=psb_err_from_subroutine_
|
|
|
|
|
ch_err='geall/asb'
|
|
|
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
|
|
|
goto 9999
|
|
|
|
|
end if
|
|
|
|
|
|
|
|
|
|
if ((m /= 0).and.(n /= 0)) then
|
|
|
|
|
call a%aclsum(v,info)
|
|
|
|
|
if (info == psb_success_) call psb_halo(v,desc_a,info,tran='T')
|
|
|
|
|
if(info /= psb_success_) then
|
|
|
|
|
info=psb_err_from_subroutine_
|
|
|
|
|
ch_err='psb_halo'
|
|
|
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
|
|
|
goto 9999
|
|
|
|
|
end if
|
|
|
|
|
res = maxval(v(1:nr))
|
|
|
|
|
else
|
|
|
|
|
res = dzero
|
|
|
|
|
end if
|
|
|
|
|
! compute global max
|
|
|
|
|
call psb_amx(ictxt, res)
|
|
|
|
|
|
|
|
|
|
call psb_erractionrestore(err_act)
|
|
|
|
|
return
|
|
|
|
|
|
|
|
|
|
9999 continue
|
|
|
|
|
call psb_erractionrestore(err_act)
|
|
|
|
|
|
|
|
|
|
if (err_act == psb_act_abort_) then
|
|
|
|
|
call psb_error(ictxt)
|
|
|
|
|
return
|
|
|
|
|
end if
|
|
|
|
|
return
|
|
|
|
|
end function psb_zspnrm1
|
