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.
113 lines
3.7 KiB
Fortran
113 lines
3.7 KiB
Fortran
!
|
|
! Parallel Sparse BLAS version 3.5
|
|
! (C) Copyright 2006, 2010, 2015, 2017
|
|
! Salvatore Filippone Cranfield University
|
|
! 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_snrmi.f90
|
|
!
|
|
! Function: psb_snrmi
|
|
! Forms the infinity norm of a sparse matrix,
|
|
!
|
|
! nrmi := max_i(abs(sum(A(i,:))))
|
|
!
|
|
! Arguments:
|
|
! a - type(psb_sspmat_type). The sparse matrix containing A.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
!
|
|
function psb_snrmi(a,desc_a,info) result(res)
|
|
use psb_base_mod, psb_protect_name => psb_snrmi
|
|
implicit none
|
|
|
|
type(psb_sspmat_type), intent(in) :: a
|
|
integer(psb_ipk_), intent(out) :: info
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
real(psb_spk_) :: res
|
|
|
|
! locals
|
|
integer(psb_ipk_) :: ictxt, np, me,&
|
|
& err_act, n, iia, jja, ia, ja, mdim, ndim, m
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_snrmi'
|
|
if(psb_get_errstatus() /= 0) 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()
|
|
|
|
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
|
|
|
|
if ((m /= 0).and.(n /= 0)) then
|
|
res = a%spnmi()
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_snrmi'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
else
|
|
res = szero
|
|
end if
|
|
|
|
! compute global max
|
|
call psb_amx(ictxt, res)
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ictxt,err_act)
|
|
|
|
return
|
|
end function psb_snrmi
|