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74 lines
2.6 KiB
Fortran
74 lines
2.6 KiB
Fortran
1 year ago
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! Parallel Sparse BLAS GPU plugin
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! (C) Copyright 2013
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!
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! Salvatore Filippone
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! Alessandro Fanfarillo
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions
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! are met:
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! 1. Redistributions of source code must retain the above copyright
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! notice, this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright
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! notice, this list of conditions, and the following disclaimer in the
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! documentation and/or other materials provided with the distribution.
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! 3. The name of the PSBLAS group or the names of its contributors may
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! not be used to endorse or promote products derived from this
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! software without specific written permission.
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!
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! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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! POSSIBILITY OF SUCH DAMAGE.
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!
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function psb_c_ell_csnm1(a) result(res)
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use psb_base_mod
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use psb_c_ell_mat_mod, psb_protect_name => psb_c_ell_csnm1
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implicit none
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class(psb_c_ell_sparse_mat), intent(in) :: a
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real(psb_spk_) :: res
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integer(psb_ipk_) :: i,j,k,m,n, nnz, ir, jc, nc, info
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real(psb_spk_), allocatable :: vt(:)
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logical :: tra
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Integer(Psb_ipk_) :: err_act
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character(len=20) :: name='c_ell_csnm1'
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logical, parameter :: debug=.false.
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if (a%is_dev()) call a%sync()
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res = szero
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nnz = a%get_nzeros()
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m = a%get_nrows()
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n = a%get_ncols()
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allocate(vt(n),stat=info)
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if (info /= 0) return
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if (a%is_unit()) then
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vt(:) = sone
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else
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vt(:) = szero
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end if
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do i=1, m
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do j=1,a%irn(i)
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k = a%ja(i,j)
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vt(k) = vt(k) + abs(a%val(i,j))
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end do
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end do
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res = maxval(vt(1:n))
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deallocate(vt,stat=info)
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return
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end function psb_c_ell_csnm1
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