add_sm_st.f File Reference

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Functions/Subroutines
subroutine	add_sm_st (au, ad, jq, irow, i, j, value, i0, i1)

Function/Subroutine Documentation

add_sm_st()

subroutine add_sm_st	(	real*8, dimension(*), intent(inout)	au,
		real*8, dimension(*), intent(inout)	ad,
		integer, dimension(*), intent(in)	jq,
		integer, dimension(*), intent(in)	irow,
		integer, intent(in)	i,
		integer, intent(in)	j,
		real*8, intent(in)	value,
		integer, intent(in)	i0,
		integer, intent(in)	i1
	)

!
!     stores the stiffness coefficient (i,j) with value "value"
!     in the stiffness matrix stored in spare matrix format
!
      implicit none
!
      integer jq(*),irow(*),i,j,ii,jj,ipointer,id,i0,i1
!
      real*8 ad(*),au(*),value
!
      intent(in) jq,irow,i,j,value,i0,i1
!
      intent(inout) ad,au
!
      if(i.eq.j) then
         if(i0.eq.i1) then
            ad(i)=ad(i)+value
         else
            ad(i)=ad(i)+2.d0*value
         endif
         return
      elseif(i.gt.j) then
         ii=i
         jj=j
      else
         ii=j
         jj=i
      endif
!
      call nident(irow(jq(jj)),ii,jq(jj+1)-jq(jj),id)
!
      ipointer=jq(jj)+id-1
!
      if(irow(ipointer).ne.ii) then
         write(*,*) '*ERROR in add_sm_st: coefficient should be 0'
         call exit(201)
      else
         au(ipointer)=au(ipointer)+value
      endif
!
      return