update_state.f90

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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!! Time-stamp: <2015-05-13 12:01:23 pbrowne>
!!!
!!!    Routines to update states
!!!    Copyright (C) 2014  Philip A. Browne
!!!
!!!    This program is free software: you can redistribute it and/or modify
!!!    it under the terms of the GNU General Public License as published by
!!!    the Free Software Foundation, either version 3 of the License, or
!!!    (at your option) any later version.
!!!
!!!    This program is distributed in the hope that it will be useful,
!!!    but WITHOUT ANY WARRANTY; without even the implied warranty of
!!!    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
!!!    GNU General Public License for more details.
!!!
!!!    You should have received a copy of the GNU General Public License
!!!    along with this program.  If not, see <http://www.gnu.org/licenses/>.
!!!
!!!    Email: p.browne @ reading.ac.uk
!!!    Mail:  School of Mathematical and Physical Sciences,
!!!           University of Reading,
!!!       Reading, UK
!!!       RG6 6BB
!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



subroutine update_state(state,fpsi,kgain,betan)
use sizes
implicit none
integer, parameter :: rk=kind(1.0d0)
real(kind=rk), dimension(state_dim), intent(out) :: state
real(kind=rk), dimension(state_dim), intent(in) :: fpsi,kgain
real(kind=rk), dimension(state_dim), intent(inout) :: betan
real(kind=rk) :: dnrm2
logical, parameter :: norms=.false.



!do the addition
state = fpsi+kgain+betan

if(norms) print*,' |kgain|= ',dnrm2(state_dim,kgain,1),' |betan| = ',dnrm2(state_dim,betan,1)


end subroutine update_state