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psblas3/base/serial/aux/dmsort_up.f90

174 lines
5.0 KiB
Fortran

!
! Parallel Sparse BLAS version 2.2
! (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
! Alfredo Buttari University of Rome Tor Vergata
!
! 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: msort_up.f90
!
! Subroutine: msort_up
! This subroutine sorts an integer array into ascending order.
!
! Arguments:
! n - integer Input: size of the array
! k - integer(*) input: array of keys to be sorted
! l - integer(0:n+1) output: link list
! iret - integer output: 0 Normal termination
! 1 the array was already sorted
! *
! REFERENCES = (1) D. E. Knuth *
! The Art of Computer Programming, *
! vol.3: Sorting and Searching *
! Addison-Wesley, 1973 *
! *
! call msort_up(n,x,iaux,iret)
!
! if (iret == 0) then
! lp = iaux(0)
! k = 1
! do
! if ((lp==0).or.(k>n)) exit
! do
! if (lp >= k) exit
! lp = iaux(lp)
! end do
! iswap = x(lp)
! x(lp) = x(k)
! x(k) = iswap
! lswap = iaux(lp)
! iaux(lp) = iaux(k)
! iaux(k) = lp
! lp = lswap
! k = k + 1
! enddo
! end if
!
!
subroutine dmsort_up(n,k,l,iret)
psblas-dev: README base/comm/psb_dgather.f90 base/comm/psb_dhalo.f90 base/comm/psb_dovrl.f90 base/comm/psb_dscatter.F90 base/comm/psb_ihalo.f90 base/comm/psb_zgather.f90 base/comm/psb_zhalo.f90 base/comm/psb_zovrl.f90 base/comm/psb_zscatter.F90 base/internals/psi_dswapdata.F90 base/internals/psi_dswaptran.F90 base/internals/psi_iswapdata.F90 base/internals/psi_iswaptran.F90 base/internals/psi_zswapdata.F90 base/internals/psi_zswaptran.F90 base/modules/Makefile base/modules/cutil.c base/modules/fakempi.c base/modules/psb_comm_mod.f90 base/modules/psb_const_mod.f90 base/modules/psb_desc_type.f90 base/modules/psb_error_mod.F90 base/modules/psb_inter_desc_type.f90 base/modules/psb_penv_mod.F90 base/modules/psb_psblas_mod.f90 base/modules/psb_realloc_mod.F90 base/modules/psb_serial_mod.f90 base/modules/psb_sort_mod.f90 base/modules/psb_spmat_type.f90 base/modules/psb_spsb_mod.f90 base/modules/psb_tools_mod.f90 base/modules/psi_mod.f90 base/modules/psi_serial_mod.f90 base/psblas/psb_damax.f90 base/psblas/psb_dasum.f90 base/psblas/psb_daxpby.f90 base/psblas/psb_ddot.f90 base/psblas/psb_dnrm2.f90 base/psblas/psb_dnrmi.f90 base/psblas/psb_dspmm.f90 base/psblas/psb_dspsm.f90 base/psblas/psb_zamax.f90 base/psblas/psb_zasum.f90 base/psblas/psb_zaxpby.f90 base/psblas/psb_zdot.f90 base/psblas/psb_znrm2.f90 base/psblas/psb_znrmi.f90 base/psblas/psb_zspmm.f90 base/psblas/psb_zspsm.f90 base/serial/aux/dasr.f90 base/serial/aux/dasrx.f90 base/serial/aux/dmsort_dw.f90 base/serial/aux/dmsort_up.f90 base/serial/aux/dmsr.f90 base/serial/aux/dmsrx.f90 base/serial/aux/dsr.f90 base/serial/aux/dsrx.f90 base/serial/aux/zacmp_mod.f90 base/serial/aux/zalcmp_mod.f90 base/serial/aux/zalsr.f90 base/serial/aux/zalsrx.f90 base/serial/aux/zamsort_dw.f90 base/serial/aux/zamsort_up.f90 base/serial/aux/zamsr.f90 base/serial/aux/zamsrx.f90 base/serial/aux/zasr.f90 base/serial/aux/zasrx.f90 base/serial/aux/zlcmp_mod.f90 base/serial/aux/zlsr.f90 base/serial/aux/zlsrx.f90 base/serial/coo/dcoomm.f base/serial/coo/dcoomv.f base/serial/coo/dcoonrmi.f base/serial/coo/dcoorws.f base/serial/coo/dcoosm.f base/serial/coo/dcoosv.f base/serial/coo/zcoomm.f base/serial/coo/zcoomv.f base/serial/coo/zcoonrmi.f base/serial/coo/zcoorws.f base/serial/coo/zcoosm.f base/serial/coo/zcoosv.f base/serial/csr/dcrnrmi.f base/serial/csr/dcsrck.f base/serial/csr/dcsrmm.f base/serial/csr/dcsrmv.f base/serial/csr/dcsrmv2.f base/serial/csr/dcsrmv3.f base/serial/csr/dcsrmv4.f base/serial/csr/dcsrrws.f base/serial/csr/dcsrsm.f base/serial/csr/dcsrsv.f base/serial/csr/zcrnrmi.f base/serial/csr/zcsrck.f base/serial/csr/zcsrmm.f base/serial/csr/zcsrrws.f base/serial/csr/zcsrsm.f base/serial/csr/zsrmv.f base/serial/csr/zsrsv.f base/serial/dp/dcoco.f base/serial/dp/dcocr.f base/serial/dp/dcrco.f base/serial/dp/dcrcr.f base/serial/dp/dcrjd.f base/serial/dp/dcsrp1.f base/serial/dp/dcsrrp.f base/serial/dp/dgind_tri.f base/serial/dp/dgindex.f base/serial/dp/djadrp.f base/serial/dp/djadrp1.f base/serial/dp/djdco.f base/serial/dp/djdcox.f base/serial/dp/dvtfg.f base/serial/dp/reordvn.f base/serial/dp/zcoco.f base/serial/dp/zcocr.f base/serial/dp/zcrco.f base/serial/dp/zcrcr.f base/serial/dp/zcrjd.f base/serial/dp/zgind_tri.f base/serial/dp/zgindex.f base/serial/f77/daxpby.f base/serial/f77/dcsmm.f base/serial/f77/dcsnmi.f base/serial/f77/dcsrp.f base/serial/f77/dcsrws.f base/serial/f77/dcssm.f base/serial/f77/dgelp.f base/serial/f77/dlpupd.f base/serial/f77/dswmm.f base/serial/f77/dswsm.f base/serial/f77/smmp.f base/serial/f77/zaxpby.f base/serial/f77/zcsmm.f base/serial/f77/zcsnmi.f base/serial/f77/zcsrws.f base/serial/f77/zcssm.f base/serial/f77/zgelp.f base/serial/f77/zlpupd.f base/serial/f77/zswmm.f base/serial/f77/zswsm.f base/serial/jad/djadmm.f base/serial/jad/djadmv.f base/serial/jad/djadmv2.f base/serial/jad/djadmv3.f base/serial/jad/djadmv4.f base/serial/jad/djadnr.f base/serial/jad/djadrws.f base/serial/jad/djadsm.f base/serial/jad/djadsv.f base/serial/jad/djdnrmi.f base/serial/jad/djdrws.f base/serial/psb_dcoins.f90 base/serial/psb_dcsmm.f90 base/serial/psb_dcsmv.f90 base/serial/psb_dcsnmi.f90 base/serial/psb_dcsrp.f90 base/serial/psb_dcsrws.f90 base/serial/psb_dcssm.f90 base/serial/psb_dcssv.f90 base/serial/psb_dgelp.f90 base/serial/psb_dneigh.f90 base/serial/psb_dnumbmm.f90 base/serial/psb_dspcnv.f90 base/serial/psb_dspgetrow.f90 base/serial/psb_dspgtdiag.f90 base/serial/psb_dspscal.f90 base/serial/psb_dsymbmm.f90 base/serial/psb_getrow_mod.f90 base/serial/psb_regen_mod.f90 base/serial/psb_update_mod.f90 base/serial/psb_zcoins.f90 base/serial/psb_zcsmm.f90 base/serial/psb_zcsmv.f90 base/serial/psb_zcsnmi.f90 base/serial/psb_zcsrp.f90 base/serial/psb_zcsrws.f90 base/serial/psb_zcssm.f90 base/serial/psb_zcssv.f90 base/serial/psb_zgelp.f90 base/serial/psb_zneigh.f90 base/serial/psb_znumbmm.f90 base/serial/psb_zspcnv.f90 base/serial/psb_zspgetrow.f90 base/serial/psb_zspgtdiag.f90 base/serial/psb_zspscal.f90 base/serial/psb_zsymbmm.f90 base/tools/psb_dallc.f90 base/tools/psb_dasb.f90 base/tools/psb_dfree.f90 base/tools/psb_dins.f90 base/tools/psb_dsphalo.F90 base/tools/psb_dspins.f90 base/tools/psb_zallc.f90 base/tools/psb_zasb.f90 base/tools/psb_zfree.f90 base/tools/psb_zins.f90 base/tools/psb_zsphalo.F90 base/tools/psb_zspins.f90 docs/pdf/datastruct.tex docs/pdf/penv.tex docs/userguide.pdf krylov/psb_dbicg.f90 krylov/psb_dcg.f90 krylov/psb_dcgs.f90 krylov/psb_dcgstab.F90 krylov/psb_dcgstabl.f90 krylov/psb_drgmres.f90 krylov/psb_krylov_mod.f90 krylov/psb_zbicg.f90 krylov/psb_zcg.f90 krylov/psb_zcgs.f90 krylov/psb_zcgstab.f90 krylov/psb_zcgstabl.f90 krylov/psb_zrgmres.f90 prec/psb_dbjac_aply.f90 prec/psb_dbjac_bld.f90 prec/psb_dgprec_aply.f90 prec/psb_dilu_fct.f90 prec/psb_dprc_aply.f90 prec/psb_dprecset.f90 prec/psb_prec_mod.f90 prec/psb_prec_type.f90 prec/psb_zbjac_aply.f90 prec/psb_zbjac_bld.f90 prec/psb_zgprec_aply.f90 prec/psb_zilu_fct.f90 prec/psb_zprc_aply.f90 prec/psb_zprecset.f90 test/fileread/df_sample.f90 test/fileread/getp.f90 test/fileread/zf_sample.f90 test/pargen/ppde.f90 test/util/Makefile util/psb_hbio_mod.f90 util/psb_mat_dist_mod.f90 util/psb_metispart_mod.F90 util/psb_mmio_mod.f90 util/psb_read_mat_mod.f90 Merged kind type names changes from r:2905:2906 in branches/psblas-2.2-maint.
17 years ago
use psb_const_mod
implicit none
integer n, iret
psblas-dev: README base/comm/psb_dgather.f90 base/comm/psb_dhalo.f90 base/comm/psb_dovrl.f90 base/comm/psb_dscatter.F90 base/comm/psb_ihalo.f90 base/comm/psb_zgather.f90 base/comm/psb_zhalo.f90 base/comm/psb_zovrl.f90 base/comm/psb_zscatter.F90 base/internals/psi_dswapdata.F90 base/internals/psi_dswaptran.F90 base/internals/psi_iswapdata.F90 base/internals/psi_iswaptran.F90 base/internals/psi_zswapdata.F90 base/internals/psi_zswaptran.F90 base/modules/Makefile base/modules/cutil.c base/modules/fakempi.c base/modules/psb_comm_mod.f90 base/modules/psb_const_mod.f90 base/modules/psb_desc_type.f90 base/modules/psb_error_mod.F90 base/modules/psb_inter_desc_type.f90 base/modules/psb_penv_mod.F90 base/modules/psb_psblas_mod.f90 base/modules/psb_realloc_mod.F90 base/modules/psb_serial_mod.f90 base/modules/psb_sort_mod.f90 base/modules/psb_spmat_type.f90 base/modules/psb_spsb_mod.f90 base/modules/psb_tools_mod.f90 base/modules/psi_mod.f90 base/modules/psi_serial_mod.f90 base/psblas/psb_damax.f90 base/psblas/psb_dasum.f90 base/psblas/psb_daxpby.f90 base/psblas/psb_ddot.f90 base/psblas/psb_dnrm2.f90 base/psblas/psb_dnrmi.f90 base/psblas/psb_dspmm.f90 base/psblas/psb_dspsm.f90 base/psblas/psb_zamax.f90 base/psblas/psb_zasum.f90 base/psblas/psb_zaxpby.f90 base/psblas/psb_zdot.f90 base/psblas/psb_znrm2.f90 base/psblas/psb_znrmi.f90 base/psblas/psb_zspmm.f90 base/psblas/psb_zspsm.f90 base/serial/aux/dasr.f90 base/serial/aux/dasrx.f90 base/serial/aux/dmsort_dw.f90 base/serial/aux/dmsort_up.f90 base/serial/aux/dmsr.f90 base/serial/aux/dmsrx.f90 base/serial/aux/dsr.f90 base/serial/aux/dsrx.f90 base/serial/aux/zacmp_mod.f90 base/serial/aux/zalcmp_mod.f90 base/serial/aux/zalsr.f90 base/serial/aux/zalsrx.f90 base/serial/aux/zamsort_dw.f90 base/serial/aux/zamsort_up.f90 base/serial/aux/zamsr.f90 base/serial/aux/zamsrx.f90 base/serial/aux/zasr.f90 base/serial/aux/zasrx.f90 base/serial/aux/zlcmp_mod.f90 base/serial/aux/zlsr.f90 base/serial/aux/zlsrx.f90 base/serial/coo/dcoomm.f base/serial/coo/dcoomv.f base/serial/coo/dcoonrmi.f base/serial/coo/dcoorws.f base/serial/coo/dcoosm.f base/serial/coo/dcoosv.f base/serial/coo/zcoomm.f base/serial/coo/zcoomv.f base/serial/coo/zcoonrmi.f base/serial/coo/zcoorws.f base/serial/coo/zcoosm.f base/serial/coo/zcoosv.f base/serial/csr/dcrnrmi.f base/serial/csr/dcsrck.f base/serial/csr/dcsrmm.f base/serial/csr/dcsrmv.f base/serial/csr/dcsrmv2.f base/serial/csr/dcsrmv3.f base/serial/csr/dcsrmv4.f base/serial/csr/dcsrrws.f base/serial/csr/dcsrsm.f base/serial/csr/dcsrsv.f base/serial/csr/zcrnrmi.f base/serial/csr/zcsrck.f base/serial/csr/zcsrmm.f base/serial/csr/zcsrrws.f base/serial/csr/zcsrsm.f base/serial/csr/zsrmv.f base/serial/csr/zsrsv.f base/serial/dp/dcoco.f base/serial/dp/dcocr.f base/serial/dp/dcrco.f base/serial/dp/dcrcr.f base/serial/dp/dcrjd.f base/serial/dp/dcsrp1.f base/serial/dp/dcsrrp.f base/serial/dp/dgind_tri.f base/serial/dp/dgindex.f base/serial/dp/djadrp.f base/serial/dp/djadrp1.f base/serial/dp/djdco.f base/serial/dp/djdcox.f base/serial/dp/dvtfg.f base/serial/dp/reordvn.f base/serial/dp/zcoco.f base/serial/dp/zcocr.f base/serial/dp/zcrco.f base/serial/dp/zcrcr.f base/serial/dp/zcrjd.f base/serial/dp/zgind_tri.f base/serial/dp/zgindex.f base/serial/f77/daxpby.f base/serial/f77/dcsmm.f base/serial/f77/dcsnmi.f base/serial/f77/dcsrp.f base/serial/f77/dcsrws.f base/serial/f77/dcssm.f base/serial/f77/dgelp.f base/serial/f77/dlpupd.f base/serial/f77/dswmm.f base/serial/f77/dswsm.f base/serial/f77/smmp.f base/serial/f77/zaxpby.f base/serial/f77/zcsmm.f base/serial/f77/zcsnmi.f base/serial/f77/zcsrws.f base/serial/f77/zcssm.f base/serial/f77/zgelp.f base/serial/f77/zlpupd.f base/serial/f77/zswmm.f base/serial/f77/zswsm.f base/serial/jad/djadmm.f base/serial/jad/djadmv.f base/serial/jad/djadmv2.f base/serial/jad/djadmv3.f base/serial/jad/djadmv4.f base/serial/jad/djadnr.f base/serial/jad/djadrws.f base/serial/jad/djadsm.f base/serial/jad/djadsv.f base/serial/jad/djdnrmi.f base/serial/jad/djdrws.f base/serial/psb_dcoins.f90 base/serial/psb_dcsmm.f90 base/serial/psb_dcsmv.f90 base/serial/psb_dcsnmi.f90 base/serial/psb_dcsrp.f90 base/serial/psb_dcsrws.f90 base/serial/psb_dcssm.f90 base/serial/psb_dcssv.f90 base/serial/psb_dgelp.f90 base/serial/psb_dneigh.f90 base/serial/psb_dnumbmm.f90 base/serial/psb_dspcnv.f90 base/serial/psb_dspgetrow.f90 base/serial/psb_dspgtdiag.f90 base/serial/psb_dspscal.f90 base/serial/psb_dsymbmm.f90 base/serial/psb_getrow_mod.f90 base/serial/psb_regen_mod.f90 base/serial/psb_update_mod.f90 base/serial/psb_zcoins.f90 base/serial/psb_zcsmm.f90 base/serial/psb_zcsmv.f90 base/serial/psb_zcsnmi.f90 base/serial/psb_zcsrp.f90 base/serial/psb_zcsrws.f90 base/serial/psb_zcssm.f90 base/serial/psb_zcssv.f90 base/serial/psb_zgelp.f90 base/serial/psb_zneigh.f90 base/serial/psb_znumbmm.f90 base/serial/psb_zspcnv.f90 base/serial/psb_zspgetrow.f90 base/serial/psb_zspgtdiag.f90 base/serial/psb_zspscal.f90 base/serial/psb_zsymbmm.f90 base/tools/psb_dallc.f90 base/tools/psb_dasb.f90 base/tools/psb_dfree.f90 base/tools/psb_dins.f90 base/tools/psb_dsphalo.F90 base/tools/psb_dspins.f90 base/tools/psb_zallc.f90 base/tools/psb_zasb.f90 base/tools/psb_zfree.f90 base/tools/psb_zins.f90 base/tools/psb_zsphalo.F90 base/tools/psb_zspins.f90 docs/pdf/datastruct.tex docs/pdf/penv.tex docs/userguide.pdf krylov/psb_dbicg.f90 krylov/psb_dcg.f90 krylov/psb_dcgs.f90 krylov/psb_dcgstab.F90 krylov/psb_dcgstabl.f90 krylov/psb_drgmres.f90 krylov/psb_krylov_mod.f90 krylov/psb_zbicg.f90 krylov/psb_zcg.f90 krylov/psb_zcgs.f90 krylov/psb_zcgstab.f90 krylov/psb_zcgstabl.f90 krylov/psb_zrgmres.f90 prec/psb_dbjac_aply.f90 prec/psb_dbjac_bld.f90 prec/psb_dgprec_aply.f90 prec/psb_dilu_fct.f90 prec/psb_dprc_aply.f90 prec/psb_dprecset.f90 prec/psb_prec_mod.f90 prec/psb_prec_type.f90 prec/psb_zbjac_aply.f90 prec/psb_zbjac_bld.f90 prec/psb_zgprec_aply.f90 prec/psb_zilu_fct.f90 prec/psb_zprc_aply.f90 prec/psb_zprecset.f90 test/fileread/df_sample.f90 test/fileread/getp.f90 test/fileread/zf_sample.f90 test/pargen/ppde.f90 test/util/Makefile util/psb_hbio_mod.f90 util/psb_mat_dist_mod.f90 util/psb_metispart_mod.F90 util/psb_mmio_mod.f90 util/psb_read_mat_mod.f90 Merged kind type names changes from r:2905:2906 in branches/psblas-2.2-maint.
17 years ago
real(psb_dpk_) k(n)
integer l(0:n+1)
!
integer p,q,s,t
intrinsic iabs,isign
! ..
iret = 0
! first step: we are preparing ordered sublists, exploiting
! what order was already in the input data; negative links
! mark the end of the sublists
l(0) = 1
t = n + 1
do p = 1,n - 1
if (k(p) <= k(p+1)) then
l(p) = p + 1
else
l(t) = - (p+1)
t = p
end if
end do
l(t) = 0
l(n) = 0
! see if the input was already sorted
if (l(n+1) == 0) then
iret = 1
return
else
l(n+1) = iabs(l(n+1))
end if
mergepass: do
! otherwise, begin a pass through the list.
! throughout all the subroutine we have:
! p, q: pointing to the sublists being merged
! s: pointing to the most recently processed record
! t: pointing to the end of previously completed sublist
s = 0
t = n + 1
p = l(s)
q = l(t)
if (q == 0) exit mergepass
outer: do
if (k(p) > k(q)) then
l(s) = isign(q,l(s))
s = q
q = l(q)
if (q > 0) then
do
if (k(p) <= k(q)) cycle outer
s = q
q = l(q)
if (q <= 0) exit
end do
end if
l(s) = p
s = t
do
t = p
p = l(p)
if (p <= 0) exit
end do
else
l(s) = isign(p,l(s))
s = p
p = l(p)
if (p>0) then
do
if (k(p) > k(q)) cycle outer
s = p
p = l(p)
if (p <= 0) exit
end do
end if
! otherwise, one sublist ended, and we append to it the rest
! of the other one.
l(s) = q
s = t
do
t = q
q = l(q)
if (q <= 0) exit
end do
end if
p = -p
q = -q
if (q == 0) then
l(s) = isign(p,l(s))
l(t) = 0
exit outer
end if
end do outer
end do mergepass
end subroutine dmsort_up