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stpst_ed.f
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C->>> -----------------------------------> ems_ca_u_lg_sed_wt <<<
c Calls the routines to updates steepest edge weights and possibly
c update dual activities or do CHUZC.
c
subroutine ems_ca_u_lg_sed_wt(
& pv_c_sgn,
& u_du_act,
& vr_in_c,
& du_act,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
include 'RSMICS.INC'
include 'RSMICOM.INC'
include 'ICTVR.INC'
include 'EMSMSG.INC'
CM IF (emsol_tt .EQ. 1) THEN
C? include 'EMSTT.INC'
CM ENDIF
integer pv_c_sgn
logical u_du_act
integer vr_in_c(-vr_in_c_n_sn:n_c+1)
double precision du_act(0:mx_n_c+n_r)
double precision pi_v(0:n_r)
integer pi_ix(0:n_r)
double precision ed_wt(0:mx_n_c+n_r)
double precision btran_o_pv_c(0:n_r)
double precision rcp_pv
if (vr_t_en_bs .le. 0 .or. vr_t_lv_bs .eq. 0 .or.
& vr_t_en_bs .eq. vr_t_lv_bs) then
if (ems_msg_no_prt_fm .ge. 1) write(ems_li, 9900)
& vr_t_en_bs, vr_t_lv_bs
call ems_msg_wr_li(bug_msg_n)
CM IF (emsol_deb .EQ. 1) THEN
C? call ems_dump
CM ENDIF
go to 7000
endif
ed_wt_o_vr_t_en_bs = ed_wt(vr_t_en_bs)
ed_wt(vr_t_lv_bs) = inf
CM IF (emsol_tt .EQ. 1) THEN
C? if (ems_tt_pc_lvl1) call ems_tt_rec(u_lg_sed_wt_tt, n_bs)
CM ENDIF
if (u_du_act) then
call ems_u_lg_sed_wt_du_act(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& du_act,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c)
else
call ems_u_lg_sed_wt(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c)
endif
if (vr_t_lv_bs .ge. mx_n_c) then
c
c Set the weight for the variable which has left the basis.
c
rcp_pv = one/pv
ed_wt(vr_t_lv_bs) = ed_wt_o_vr_t_en_bs*rcp_pv*rcp_pv
endif
CM IF (emsol_tt .EQ. 1) THEN
C? if (ems_tt_pc_lvl1) call ems_tt_rec(-u_lg_sed_wt_tt, n_bs)
CM ENDIF
7000 continue
return
9900 format(
& 'Calling u_lg_sed_wt with vr_t_en_bs, vr_t_lv_bs = ',
& i9, i9)
end
C->>> ----------------------------------------> ems_u_lg_sed_wt <<<
c Updates steepest edge weights for logicals.
c
subroutine ems_u_lg_sed_wt(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
CM IF (emsol_da .EQ. 1) THEN
C? include 'EMSDA.INC'
CM ENDIF
include 'ICTVR.INC'
include 'RLCTVR.INC'
integer pv_c_sgn
integer vr_t_en_bs
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer pi_ix(0:n_r)
double precision pi_v(0:n_r)
double precision ed_wt(0:mx_n_c+n_r)
double precision btran_o_pv_c(0:n_r)
integer vr_n, c_n, ix_n, r_n
integer c_loop_ln
double precision ed_wt_o_vr_t_en_bs, su
ed_wt_o_vr_t_en_bs = ed_wt(vr_t_en_bs)
c_loop_ln = vr_in_c(os_lg_in_c_l_pc_p)
if (pi_ix(0) .gt. n_r .or.
& tbu_r_loop_mode .eq. tbu_r_loop_no .or.
& (tbu_r_loop_mode .eq. tbu_r_loop_poss .and.
& 2*c_loop_ln .le. pi_ix(0))) then
do 10, c_n = 1, vr_in_c(os_lg_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
r_n = vr_n - mx_n_c
CM IF (emsol_da .EQ. 1) THEN
C? if (pi_v(r_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (pi_v(r_n) .eq. zero) goto 10
if (abs(pi_v(r_n)) .le. u_ed_wt_ze) goto 10
su = pi_v(r_n)*ed_wt_o_vr_t_en_bs +
& pv_c_sgn*btran_o_pv_c(r_n)
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(r_n)*su
10 continue
else
do 20, ix_n = 1, pi_ix(0)
r_n = pi_ix(ix_n)
CM IF (emsol_da .EQ. 1) THEN
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
CM ENDIF
if (abs(pi_v(r_n)) .le. u_ed_wt_ze) goto 20
su = pi_v(r_n)*ed_wt_o_vr_t_en_bs +
& pv_c_sgn*btran_o_pv_c(r_n)
vr_n = mx_n_c + r_n
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(r_n)*su
20 continue
endif
return
end
C->>> -----------------------------> ems_u_lg_sed_wt_du_act <<<
c Updates steepest edge weights and dual activities for logicals.
c
subroutine ems_u_lg_sed_wt_du_act(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& du_act,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
CM IF (emsol_da .EQ. 1) THEN
C? include 'EMSDA.INC'
CM ENDIF
include 'ICTVR.INC'
include 'RLCTVR.INC'
integer pv_c_sgn
integer vr_t_en_bs
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer pi_ix(0:n_r)
double precision du_act(0:mx_n_c+n_r)
double precision pi_v(0:n_r)
double precision ed_wt(0:mx_n_c+n_r)
double precision btran_o_pv_c(0:n_r)
integer vr_n, c_n, ix_n, r_n
integer c_loop_ln
double precision pi_v_mu_1, pi_v_mu_2, su
c
c When btran_o_pv_c is negated, negating pi_v_mu_1 then negates
c pi_v_mu_2. Hence the non-btran_o_pv_c contribution to su is
c negated but the product pi_v_mu_1*su has the right sign.
c
pi_v_mu_1 = pv_c_sgn/du_act(vr_t_en_bs)
pi_v_mu_2 = ed_wt(vr_t_en_bs)*pi_v_mu_1
c
c Update the weights (and costs) for the nonbasic variables. This
c does not give the correct weight for the variable which has just
c left the basis---this is assigned at the end of the routine---but
c it does give the correct reduced cost for this variable. This must
c be done here. If the cost of this variable does not change then
c its reduced cost is pi_rhs_v_in_pv_r*rcp_pv.
c However, if the variable becomes feasible as it leaves the basis
c then its reduced cost is not pi_rhs_v_in_pv_r*rcp_pv because
c its objective coefficient changes---by an amount delta. In this
c case the reduced cost is delta + pi_rhs_v_in_pv_r*rcp_pv.
c This is achieved by the calling routine initialising the reduced
c cost to zero or delta accordingly so that the correct updated
c reduced cost will be obtained by adding pi_v(pv_r_n)---which is
c rcp_pv*pi_rhs_v_in_pv_r.
c
c_loop_ln = vr_in_c(os_lg_in_c_l_pc_p)
if (pi_ix(0) .gt. n_r .or.
& tbu_r_loop_mode .eq. tbu_r_loop_no .or.
& (tbu_r_loop_mode .eq. tbu_r_loop_poss .and.
& 2*c_loop_ln .le. pi_ix(0))) then
do 10, c_n = 1, vr_in_c(os_lg_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
r_n = vr_n - mx_n_c
CM IF (emsol_da .EQ. 1) THEN
C? if (pi_v(r_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (pi_v(r_n) .eq. zero) goto 10
if (abs(pi_v(r_n)) .le. u_ed_wt_ze) goto 10
su = pi_v(r_n)*pi_v_mu_2 + btran_o_pv_c(r_n)
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(r_n)*pi_v_mu_1*su
du_act(vr_n) = du_act(vr_n) - pi_v(r_n)
10 continue
else
do 20, ix_n = 1, pi_ix(0)
r_n = pi_ix(ix_n)
CM IF (emsol_da .EQ. 1) THEN
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
CM ENDIF
if (abs(pi_v(r_n)) .le. u_ed_wt_ze) goto 20
su = pi_v(r_n)*pi_v_mu_2 + btran_o_pv_c(r_n)
vr_n = mx_n_c + r_n
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(r_n)*pi_v_mu_1*su
du_act(vr_n) = du_act(vr_n) - pi_v(r_n)
20 continue
endif
return
end
C->>> ------------------------------> ems_perm_ca_u_lg_sed_wt <<<
c Calls the routines to updates steepest edge weights and possibly
c update dual activities or do CHUZC.
c
subroutine ems_perm_ca_u_lg_sed_wt(
& pv_c_sgn,
& u_du_act,
& vr_in_c,
& du_act,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c,
& og_t_nw_perm,
& nw_t_og_perm)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
include 'RSMICS.INC'
include 'RSMICOM.INC'
include 'ICTVR.INC'
include 'EMSMSG.INC'
CM IF (emsol_tt .EQ. 1) THEN
C? include 'EMSTT.INC'
CM ENDIF
integer pv_c_sgn
logical u_du_act
integer vr_in_c(-vr_in_c_n_sn:n_c+1)
integer pi_ix(0:n_r)
integer og_t_nw_perm(0:n_r)
integer nw_t_og_perm(0:n_r)
double precision du_act(0:mx_n_c+n_r)
double precision pi_v(0:n_r)
double precision ed_wt(0:mx_n_c+n_r)
double precision btran_o_pv_c(0:n_r)
double precision rcp_pv
if (vr_t_en_bs .le. 0 .or. vr_t_lv_bs .eq. 0 .or.
& vr_t_en_bs .eq. vr_t_lv_bs) then
if (ems_msg_no_prt_fm .ge. 1) write(ems_li, 9900)
& vr_t_en_bs, vr_t_lv_bs
call ems_msg_wr_li(warn_msg_n)
CM IF (emsol_deb .EQ. 1) THEN
C? call ems_dump
CM ENDIF
go to 7000
endif
ed_wt_o_vr_t_en_bs = ed_wt(vr_t_en_bs)
ed_wt(vr_t_lv_bs) = inf
CM IF (emsol_tt .EQ. 1) THEN
C? if (ems_tt_pc_lvl1) call ems_tt_rec(u_lg_sed_wt_tt, n_bs)
CM ENDIF
if (u_du_act) then
call ems_perm_u_lg_sed_wt_du_act(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& du_act,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c,
& og_t_nw_perm,
& nw_t_og_perm)
else
call ems_perm_u_lg_sed_wt(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c,
& og_t_nw_perm,
& nw_t_og_perm)
endif
if (vr_t_lv_bs .ge. mx_n_c) then
c
c Set the weight for the variable which has left the basis.
c
rcp_pv = one/pv
ed_wt(vr_t_lv_bs) = ed_wt_o_vr_t_en_bs*rcp_pv*rcp_pv
endif
CM IF (emsol_tt .EQ. 1) THEN
C? if (ems_tt_pc_lvl1) call ems_tt_rec(-u_lg_sed_wt_tt, n_bs)
CM ENDIF
7000 continue
return
9900 format(
& 'Calling u_lg_sed_wt with vr_t_en_bs, vr_t_lv_bs = ',
& i9, i9)
end
C->>> -----------------------------------> ems_perm_u_lg_sed_wt <<<
c Updates steepest edge weights for logicals.
c
subroutine ems_perm_u_lg_sed_wt(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c,
& og_t_nw_perm,
& nw_t_og_perm)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
CM IF (emsol_da .EQ. 1) THEN
C? include 'EMSDA.INC'
CM ENDIF
include 'ICTVR.INC'
include 'RLCTVR.INC'
integer pv_c_sgn
integer vr_t_en_bs
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer pi_ix(0:n_r)
integer og_t_nw_perm(0:n_r)
integer nw_t_og_perm(0:n_r)
double precision pi_v(0:n_r)
double precision ed_wt(0:mx_n_c+n_r)
double precision btran_o_pv_c(0:n_r)
integer vr_n, nw_r_n, c_n, ix_n, r_n, og_r_n
integer c_loop_ln
double precision ed_wt_o_vr_t_en_bs, su
ed_wt_o_vr_t_en_bs = ed_wt(vr_t_en_bs)
c_loop_ln = vr_in_c(os_lg_in_c_l_pc_p)
if (pi_ix(0) .gt. n_r .or.
& tbu_r_loop_mode .eq. tbu_r_loop_no .or.
& (tbu_r_loop_mode .eq. tbu_r_loop_poss .and.
& 2*c_loop_ln .le. pi_ix(0))) then
do 10, c_n = 1, vr_in_c(os_lg_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
r_n = vr_n - mx_n_c
nw_r_n = og_t_nw_perm(r_n)
CM IF (emsol_da .EQ. 1) THEN
C? if (pi_v(nw_r_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(nw_r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (pi_v(nw_r_n) .eq. zero) goto 10
if (abs(pi_v(nw_r_n)) .le. u_ed_wt_ze) goto 10
su = pi_v(nw_r_n)*ed_wt_o_vr_t_en_bs +
& pv_c_sgn*btran_o_pv_c(r_n)
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(nw_r_n)*su
10 continue
else
do 20, ix_n = 1, pi_ix(0)
r_n = pi_ix(ix_n)
og_r_n = nw_t_og_perm(r_n)
CM IF (emsol_da .EQ. 1) THEN
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(nw_r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
CM ENDIF
if (abs(pi_v(r_n)) .le. u_ed_wt_ze) goto 20
su = pi_v(r_n)*ed_wt_o_vr_t_en_bs +
& pv_c_sgn*btran_o_pv_c(og_r_n)
vr_n = mx_n_c + og_r_n
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(r_n)*su
20 continue
endif
return
end
C->>> ------------------------> ems_perm_u_lg_sed_wt_du_act <<<
c Updates steepest edge weights and dual activities for logicals.
c
subroutine ems_perm_u_lg_sed_wt_du_act(
& pv_c_sgn,
& vr_t_en_bs,
& vr_in_c,
& du_act,
& pi_v,
& pi_ix,
& ed_wt,
& btran_o_pv_c,
& og_t_nw_perm,
& nw_t_og_perm)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
CM IF (emsol_da .EQ. 1) THEN
C? include 'EMSDA.INC'
CM ENDIF
include 'ICTVR.INC'
include 'RLCTVR.INC'
integer pv_c_sgn
integer vr_t_en_bs
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer pi_ix(0:n_r)
integer og_t_nw_perm(0:n_r)
integer nw_t_og_perm(0:n_r)
double precision du_act(0:mx_n_c+n_r)
double precision pi_v(0:n_r)
double precision ed_wt(0:mx_n_c+n_r)
double precision btran_o_pv_c(0:n_r)
integer vr_n, nw_r_n, c_n, ix_n, r_n, og_r_n
integer c_loop_ln
double precision pi_v_mu_1, pi_v_mu_2, su
pi_v_mu_1 = pv_c_sgn/du_act(vr_t_en_bs)
pi_v_mu_2 = ed_wt(vr_t_en_bs)*pi_v_mu_1
c_loop_ln = vr_in_c(os_lg_in_c_l_pc_p)
if (pi_ix(0) .gt. n_r .or.
& tbu_r_loop_mode .eq. tbu_r_loop_no .or.
& (tbu_r_loop_mode .eq. tbu_r_loop_poss .and.
& 2*c_loop_ln .le. pi_ix(0))) then
do 10 c_n = 1, vr_in_c(os_lg_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
r_n = vr_n - mx_n_c
nw_r_n = og_t_nw_perm(r_n)
CM IF (emsol_da .EQ. 1) THEN
C? if (pi_v(nw_r_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(nw_r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (pi_v(nw_r_n) .eq. zero) goto 10
if (abs(pi_v(nw_r_n)) .le. u_ed_wt_ze) goto 10
su = pi_v(nw_r_n)*pi_v_mu_2 + btran_o_pv_c(r_n)
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(nw_r_n)*pi_v_mu_1*su
du_act(vr_n) = du_act(vr_n) - pi_v(nw_r_n)
10 continue
else
do 20, ix_n = 1, pi_ix(0)
r_n = pi_ix(ix_n)
og_r_n = nw_t_og_perm(r_n)
CM IF (emsol_da .EQ. 1) THEN
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(pi_v(nw_r_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
CM ENDIF
if (abs(pi_v(r_n)) .le. u_ed_wt_ze) goto 20
su = pi_v(r_n)*pi_v_mu_2 + btran_o_pv_c(og_r_n)
vr_n = mx_n_c + og_r_n
ed_wt(vr_n) = ed_wt(vr_n) + pi_v(r_n)*pi_v_mu_1*su
du_act(vr_n) = du_act(vr_n) - pi_v(r_n)
20 continue
endif
return
end
C->>> ---------------------------------------> ems_ca_u_struc_sed_wt <<<
c Calls the routines to updates steepest edge weights and possibly
c update dual activities or do CHUZC.
c
subroutine ems_ca_u_struc_sed_wt(
& pv_c_sgn,
& u_du_act,
& vr_in_c,
& du_act,
& tbu_r_v,
& tbu_r_ix,
& ed_wt,
& r_v,
& r_ix,
& c_sa,
& btran_o_pv_c)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
include 'RSMICS.INC'
include 'RSMICOM.INC'
include 'ICTVR.INC'
include 'EMSMSG.INC'
CM IF (emsol_tt .EQ. 1) THEN
C? include 'EMSTT.INC'
CM ENDIF
integer pv_c_sgn
logical u_du_act
integer vr_in_c(-vr_in_c_n_sn:n_c+1)
integer r_ix(0:n_a_el), c_sa(0:n_c+1)
double precision du_act(0:mx_n_c+n_r)
double precision tbu_r_v(0:mx_n_c+n_r)
integer tbu_r_ix(0:n_c)
double precision ed_wt(0:mx_n_c+n_r)
double precision r_v(0:n_a_el)
double precision btran_o_pv_c(0:n_r)
double precision rcp_pv
integer struc_in_c_l_pc_p_p1, sv_vr_in_c, r_n
double precision sv_tbu_r_v
if (vr_t_en_bs .le. 0 .or. vr_t_lv_bs .eq. 0 .or.
& vr_t_en_bs .eq. vr_t_lv_bs) then
if (ems_msg_no_prt_fm .ge. 1) write(ems_li, 9900)
& vr_t_en_bs, vr_t_lv_bs
call ems_msg_wr_li(warn_msg_n)
CM IF (emsol_deb .EQ. 1) THEN
C? call ems_dump
CM ENDIF
go to 7000
endif
ed_wt_o_vr_t_en_bs = ed_wt(vr_t_en_bs)
CM IF (emsol_tt .EQ. 1) THEN
C? if (ems_tt_pc_lvl1) call ems_tt_rec(u_struc_sed_wt_tt, n_bs)
CM ENDIF
if (u_du_act) then
if (iand(asm_msk, asm_u_sed_wt) .ne. 0) then
struc_in_c_l_pc_p_p1 = vr_in_c(os_struc_in_c_l_pc_p) + 1
sv_vr_in_c = vr_in_c(struc_in_c_l_pc_p_p1)
vr_in_c(struc_in_c_l_pc_p_p1) = 0
sv_tbu_r_v = tbu_r_v(0)
tbu_r_v(0) = 1.0d0
CM IF (emsol_asm .EQ. 1) THEN
C? call ems_core_u_struc_sed_wt(
C? & pv_c_sgn,
C? & vr_t_en_bs,
C? & vr_in_c,
C? & du_act,
C? & tbu_r_v,
C? & ed_wt,
C? & r_v,
C? & r_ix,
C? & c_sa,
C? & btran_o_pv_c)
CM ELSE
call ems_u_struc_sed_wt_du_act(
& pv_c_sgn,
& vr_in_c,
& du_act,
& tbu_r_v,
& tbu_r_ix,
& ed_wt,
& r_v,
& r_ix,
& c_sa,
& btran_o_pv_c)
CM ENDIF
vr_in_c(struc_in_c_l_pc_p_p1) = sv_vr_in_c
tbu_r_v(0) = sv_tbu_r_v
else
call ems_u_struc_sed_wt_du_act(
& pv_c_sgn,
& vr_in_c,
& du_act,
& tbu_r_v,
& tbu_r_ix,
& ed_wt,
& r_v,
& r_ix,
& c_sa,
& btran_o_pv_c)
endif
else
call ems_u_struc_sed_wt(
& pv_c_sgn,
& vr_in_c,
& tbu_r_v,
& tbu_r_ix,
& ed_wt,
& r_v,
& r_ix,
& c_sa,
& btran_o_pv_c)
endif
if (vr_t_lv_bs .le. n_c) then
c
c Set the weight for the variable which has left the basis.
c
rcp_pv = one/pv
ed_wt(vr_t_lv_bs) = ed_wt_o_vr_t_en_bs*rcp_pv*rcp_pv
endif
c
c Zero the vector which held the BTRANned pivotal column.
c
do 10, r_n = 1, n_r
btran_o_pv_c(r_n) = zero
10 continue
if (iand(ck_msk, ze_a_ck_bt) .ne. 0)
& call ems_ck_ze_rl_a(n_c, tbu_r_v)
CM IF (emsol_tt .EQ. 1) THEN
C? if (ems_tt_pc_lvl1) call ems_tt_rec(-u_struc_sed_wt_tt, n_bs)
CM ENDIF
7000 continue
return
9900 format(
& 'Calling u_struc_sed_wt with vr_t_en_bs, vr_t_lv_bs = ',
& i9, i9)
end
C->>> -------------------------------------> ems_u_struc_sed_wt <<<
c Updates steepest edge weights for structurals.
c
subroutine ems_u_struc_sed_wt(
& pv_c_sgn,
& vr_in_c,
& tbu_r_v,
& tbu_r_ix,
& ed_wt,
& r_v,
& r_ix,
& c_sa,
& btran_o_pv_c)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
CM IF (emsol_da .EQ. 1) THEN
C? include 'EMSDA.INC'
CM ENDIF
include 'ICTVR.INC'
include 'RSMICOM.INC'
include 'RLCTVR.INC'
integer pv_c_sgn
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer r_ix(0:n_a_el), c_sa(0:n_c+1)
double precision tbu_r_v(0:mx_n_c+n_r)
integer tbu_r_ix(0:n_c)
double precision ed_wt(0:mx_n_c+n_r)
double precision r_v(0:n_a_el)
double precision btran_o_pv_c(0:n_r)
integer c_loop_ln, vr_n, c_n, el_n, ix_n
double precision su
integer tbu_r_n_nz, tbu_r_n_c
ed_wt_o_vr_t_en_bs = ed_wt(vr_t_en_bs)
c_loop_ln =
& vr_in_c(os_struc_in_c_l_pc_p) -
& vr_in_c(os_struc_in_c_f_p_m1)
tbu_r_n_c = c_loop_ln
if (tbu_r_ix(0) .gt. n_c .or.
& tbu_r_loop_mode .eq. tbu_r_loop_no .or.
& (tbu_r_loop_mode .eq. tbu_r_loop_poss .and.
& 2*c_loop_ln .le. tbu_r_ix(0))) then
tbu_r_n_nz = 0
do 20 c_n = vr_in_c(os_struc_in_c_f_p_m1) + 1,
& vr_in_c(os_struc_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
CM IF (emsol_da .EQ. 1) THEN
C? if (tbu_r_v(vr_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (tbu_r_v(vr_n) .eq. zero) goto 20
tbu_r_n_nz = tbu_r_n_nz + 1
if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze) goto 15
su = pv_c_sgn*tbu_r_v(vr_n)*ed_wt_o_vr_t_en_bs
do 10 el_n = c_sa(vr_n), c_sa(vr_n+1)-1
su = su + r_v(el_n)*btran_o_pv_c(r_ix(el_n))
10 continue
ed_wt(vr_n) = ed_wt(vr_n) + tbu_r_v(vr_n)*pv_c_sgn*su
15 continue
tbu_r_v(vr_n) = zero
20 continue
else
tbu_r_n_nz = tbu_r_ix(0)
do 120, ix_n = 1, tbu_r_ix(0)
vr_n = tbu_r_ix(ix_n)
CM IF (emsol_da .EQ. 1) THEN
C? if (tbu_r_v(vr_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (tbu_r_v(vr_n) .eq. zero) goto 120
if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze) goto 115
su = pv_c_sgn*tbu_r_v(vr_n)*ed_wt_o_vr_t_en_bs
do 110 el_n = c_sa(vr_n), c_sa(vr_n+1)-1
su = su + r_v(el_n)*btran_o_pv_c(r_ix(el_n))
110 continue
ed_wt(vr_n) = ed_wt(vr_n) + tbu_r_v(vr_n)*pv_c_sgn*su
115 continue
tbu_r_v(vr_n) = zero
120 continue
endif
c
c Get the density of the tableau row (if required).
c
if (tbu_r_dse .lt. zero) then
if (tbu_r_n_c .le. 0) then
c
c This situation---no nonbasic structurals---is pretty unlikely.
c Setting tbu_r_dse to an illegal value (rather than 0 or 1) seems
c sensible.
c
tbu_r_dse = two
else
tbu_r_dse = float(tbu_r_n_nz)/float(tbu_r_n_c)
endif
endif
return
end
C->>> --------------------------> ems_u_struc_sed_wt_du_act <<<
c Updates steepest edge weights and dual activities for structurals.
c
subroutine ems_u_struc_sed_wt_du_act(
& pv_c_sgn,
& vr_in_c,
& du_act,
& tbu_r_v,
& tbu_r_ix,
& ed_wt,
& r_v,
& r_ix,
& c_sa,
& btran_o_pv_c)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
CM IF (emsol_da .EQ. 1) THEN
C? include 'EMSDA.INC'
CM ENDIF
include 'ICTVR.INC'
include 'RSMICOM.INC'
include 'RLCTVR.INC'
integer pv_c_sgn
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer r_ix(0:n_a_el), c_sa(0:n_c+1)
double precision du_act(0:mx_n_c+n_r)
double precision tbu_r_v(0:mx_n_c+n_r)
integer tbu_r_ix(0:n_c)
double precision ed_wt(0:mx_n_c+n_r)
double precision r_v(0:n_a_el)
double precision btran_o_pv_c(0:n_r)
integer c_loop_ln, vr_n, c_n, el_n, ix_n
double precision tbu_r_v_mu_1, tbu_r_v_mu_2, su
integer tbu_r_n_nz, tbu_r_n_c
tbu_r_v_mu_1 = pv_c_sgn/du_act(vr_t_en_bs)
tbu_r_v_mu_2 = ed_wt(vr_t_en_bs)*tbu_r_v_mu_1
c_loop_ln =
& vr_in_c(os_struc_in_c_l_pc_p) -
& vr_in_c(os_struc_in_c_f_p_m1)
tbu_r_n_c = c_loop_ln
if (tbu_r_ix(0) .gt. n_c .or.
& tbu_r_loop_mode .eq. tbu_r_loop_no .or.
& (tbu_r_loop_mode .eq. tbu_r_loop_poss .and.
& 2*c_loop_ln .le. tbu_r_ix(0))) then
tbu_r_n_nz = 0
do 20 c_n = vr_in_c(os_struc_in_c_f_p_m1) + 1,
& vr_in_c(os_struc_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
CM IF (emsol_da .EQ. 1) THEN
C? if (tbu_r_v(vr_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (tbu_r_v(vr_n) .eq. zero) goto 20
tbu_r_n_nz = tbu_r_n_nz + 1
if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze) goto 15
su = tbu_r_v(vr_n)*tbu_r_v_mu_2
do 10 el_n = c_sa(vr_n), c_sa(vr_n+1)-1
su = su + r_v(el_n)*btran_o_pv_c(r_ix(el_n))
10 continue
ed_wt(vr_n) = ed_wt(vr_n) + tbu_r_v(vr_n)*tbu_r_v_mu_1*su
du_act(vr_n) = du_act(vr_n) + tbu_r_v(vr_n)
15 continue
tbu_r_v(vr_n) = zero
20 continue
else
tbu_r_n_nz = tbu_r_ix(0)
do 120, ix_n = 1, tbu_r_ix(0)
vr_n = tbu_r_ix(ix_n)
CM IF (emsol_da .EQ. 1) THEN
C? if (tbu_r_v(vr_n) .ne. zero) then
C? su_n_u_ed_wt_en = su_n_u_ed_wt_en + 1
C? if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze)
C? & su_n_u_ed_wt_ze = su_n_u_ed_wt_ze + 1
C? endif
CM ENDIF
if (tbu_r_v(vr_n) .eq. zero) goto 120
if (abs(tbu_r_v(vr_n)) .le. u_ed_wt_ze) goto 115
su = tbu_r_v(vr_n)*tbu_r_v_mu_2
do 110 el_n = c_sa(vr_n), c_sa(vr_n+1)-1
su = su + r_v(el_n)*btran_o_pv_c(r_ix(el_n))
110 continue
ed_wt(vr_n) = ed_wt(vr_n) + tbu_r_v(vr_n)*tbu_r_v_mu_1*su
du_act(vr_n) = du_act(vr_n) + tbu_r_v(vr_n)
115 continue
tbu_r_v(vr_n) = zero
120 continue
endif
c
c Get the density of the tableau row (if required).
c
if (tbu_r_dse .lt. zero) then
if (tbu_r_n_c .le. 0) then
c
c This situation---no nonbasic structurals---is pretty unlikely.
c Setting tbu_r_dse to an illegal value (rather than 0 or 1) seems
c sensible.
c
tbu_r_dse = two
else
tbu_r_dse = float(tbu_r_n_nz)/float(tbu_r_n_c)
endif
endif
return
end
C->>> --------------------------------------------> ems_iz_lg_sed_wt <<<
c Initialises the steepest edge weights (as if) for a logical basis.
c
subroutine ems_iz_lg_sed_wt(
& vr_in_r, vr_in_c,
& r_v, c_sa, ed_wt)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
include 'ICTVR.INC'
include 'EMSMSG.INC'
integer vr_in_r(0:n_r)
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer c_sa(0:n_c+1)
double precision r_v(0:n_a_el), ed_wt(0:mx_n_c+n_r)
integer r_n, c_n, vr_n, el_n
logical ed_wt_er
ed_wt_er = .false.
do 5, r_n = 1, n_r
vr_n = vr_in_r(r_n)
ed_wt(vr_n) = zero
if (vr_n .le. n_c) ed_wt_er = .true.
5 continue
if (ed_wt_er) then
if (ems_msg_no_prt_fm .ge. 1) write(ems_li, 9000)
call ems_msg_wr_li(warn_msg_n)
endif
do 10, c_n = 1, vr_in_c(os_lg_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
ed_wt(vr_n) = one
c ed_wt(vr_n) = half
c
c Surely wrong: corrected by JAJH 13/02/97: Error not noticed since
c logical basis means no logicals in pricing list
c
10 continue
do 30, c_n = vr_in_c(os_struc_in_c_f_p_m1) + 1,
& vr_in_c(os_struc_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
ed_wt(vr_n) = one
do 20 el_n = c_sa(vr_n), c_sa(vr_n+1)-1
ed_wt(vr_n) = ed_wt(vr_n) + r_v(el_n)*r_v(el_n)
20 continue
ed_wt(vr_n) = ed_wt(vr_n)*half
30 continue
c
c Indicate that the edge weight information is correct.
c
ml_da_st_msk = ior(ml_da_st_msk, ml_da_st_ed_wt)
return
9000 format('Initialising steepest edge weights for a',
& ' non-logical basis as if it were logical')
end
C->>> ------------------------------------------> ems_iz_sed_wt <<<
c Initialises the steepest edge weights for a general basis.
c
subroutine ems_iz_sed_wt(
& vr_in_r, vr_in_c,
& r_v, c_sa, ed_wt, ds, is)
implicit none
include 'EMSV.INC'
include 'EMSPM.INC'
include 'EMSMMGR.INC'
include 'EMSMEM.INC'
include 'EMSP.INC'
include 'ICTVR.INC'
include 'EMSMSG.INC'
integer vr_in_r(0:n_r)
integer vr_in_c(-vr_in_c_n_sn:n_c)
integer c_sa(0:n_c+1)
integer is(0:is_n_en_m1)
double precision r_v(0:n_a_el), ed_wt(0:mx_n_c+n_r)
double precision ds(0:ds_n_en_m1)
double precision ems_scpr
integer r_n, c_n, vr_n
integer rl_wk_a_ix
integer i_wk_a_ix
c
c Check whether the basis is actually logical.
c
do 5, r_n = 1, n_r
vr_n = vr_in_r(r_n)
ed_wt(vr_n) = zero
if (vr_n .le. n_c) goto 10
5 continue
c
c The basis is logical so calculate the weights from the constraint
c matrix columns.
c
call ems_iz_lg_sed_wt(vr_in_r, vr_in_c, r_v, c_sa, ed_wt)
goto 7000
10 continue
c
c Initialising steepest edge weights is expensive!!
c
if (ems_msg_no_prt_fm .ge. 1) write(ems_li, 9000)
call ems_msg_wr_li(info_msg_n)
call ems_g_rsmi_rl_wk_a_ix(rl_wk_a_ix)
if (rl_wk_a_ix .lt. 0) goto 8000
call ems_g_rsmi_i_wk_a_ix(i_wk_a_ix)
if (i_wk_a_ix .lt. 0) goto 8000
do 20, c_n = 1, vr_in_c(os_lg_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
do 15, r_n = 1, n_r
ds(p_rsmi_rl_wk_a(rl_wk_a_ix)+r_n) = zero
15 continue
if (sto_ftran_ix .eq. sto_ix_y) then
is(p_rsmi_i_wk_a(i_wk_a_ix)) = 0
else
is(p_rsmi_i_wk_a(i_wk_a_ix)) = n_r+1
endif
call ems_g_rhs(1, vr_n,
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)),
& is(p_rsmi_i_wk_a(i_wk_a_ix)),
& ds, is)
call ems_ftran(
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)),
& is(p_rsmi_i_wk_a(i_wk_a_ix)),
& ds, is)
ed_wt(vr_n) = ems_scpr(one,
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)),
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)), n_r)*half
20 continue
do 30, c_n = vr_in_c(os_struc_in_c_f_p_m1) + 1,
& vr_in_c(os_struc_in_c_l_pc_p)
vr_n = vr_in_c(c_n)
do 25, r_n = 1, n_r
ds(p_rsmi_rl_wk_a(rl_wk_a_ix)+r_n) = zero
25 continue
if (sto_ftran_ix .eq. sto_ix_y) then
is(p_rsmi_i_wk_a(i_wk_a_ix)) = 0
else
is(p_rsmi_i_wk_a(i_wk_a_ix)) = n_r+1
endif
call ems_g_rhs(1, vr_n,
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)),
& is(p_rsmi_i_wk_a(i_wk_a_ix)),
& ds, is)
call ems_ftran(
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)),
& is(p_rsmi_i_wk_a(i_wk_a_ix)),
& ds, is)
ed_wt(vr_n) = ems_scpr(one,
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)),
& ds(p_rsmi_rl_wk_a(rl_wk_a_ix)), n_r)*half
30 continue
call ems_fr_rsmi_rl_wk_a_ix(rl_wk_a_ix)
call ems_fr_rsmi_i_wk_a_ix(i_wk_a_ix)