diff options
Diffstat (limited to 'src/Derivatives_4_3.F90')
| -rw-r--r-- | src/Derivatives_4_3.F90 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/Derivatives_4_3.F90 b/src/Derivatives_4_3.F90 index db7ebda..85c6715 100644 --- a/src/Derivatives_4_3.F90 +++ b/src/Derivatives_4_3.F90 @@ -87,6 +87,8 @@ subroutine deriv_gf_4_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) idel = 1.0_wp / delta + if (gsize < 1) call CCTK_WARN (0, "not enough ghostzones") + direction: select case (dir) case (0) direction if ( bb(1) == 0 ) then @@ -134,6 +136,7 @@ subroutine deriv_gf_4_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(4,1) * var(ni-3,:,:) ) * idel ir = ni - 5 end if + if (il > ir+1) call CCTK_WARN (0, "domain too small") dvar(il:ir,:,:) = ( a(1) * ( var(il+1:ir+1,:,:) - & var(il-1:ir-1,:,:) ) + & a(2) * ( var(il+2:ir+2,:,:) - & @@ -187,6 +190,7 @@ subroutine deriv_gf_4_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(4,1) * var(:,nj-3,:) ) * idel jr = nj - 5 end if + if (jl > jr+1) call CCTK_WARN (0, "domain too small") dvar(:,jl:jr,:) = ( a(1) * ( var(:,jl+1:jr+1,:) - & var(:,jl-1:jr-1,:) ) + & a(2) * ( var(:,jl+2:jr+2,:) - & @@ -241,6 +245,7 @@ subroutine deriv_gf_4_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(4,1) * var(:,:,nk-3) ) * idel kr = nk - 5 end if + if (kl > kr+1) call CCTK_WARN (0, "domain too small") dvar(:,:,kl:kr) = ( a(1) * ( var(:,:,kl+1:kr+1) - & var(:,:,kl-1:kr-1) ) + & a(2) * ( var(:,:,kl+2:kr+2) - & |