Computational routine
eng

##
diffblk

### File content

          subroutine diffblk(flag,nevprt,t,res,xd,x,nx,z,nz,tvec,ntvec,
         &     rpar,nrpar,ipar,nipar,u,nu,y,ny)
    c     Copyright INRIA

    c     Scicos block simulator
    c
          double precision t,xd(*),x(*),z(*),res(*),tvec(*),rpar(*)
          double precision u(*),y(*)
          integer flag,nevprt,nx,nz,ntvec,nrpar,ipar(*)
          integer nipar,nu,ny

    c
    c
          if (flag.eq.0) then
             do 10 i=1,nu
                res(i)=x(i)-u(i)
     10      continue
          elseif(flag.eq.1) then
             do 11 i=1,nu
                y(i)=xd(i)
     11      continue
          elseif(flag.eq.6.or.flag.eq.7) then
             do 12 i=1,nu
                x(i)=u(i)
     12      continue
          endif
          end