diff options
Diffstat (limited to 'src/Derivatives_6_3.F90')
| -rw-r--r-- | src/Derivatives_6_3.F90 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/Derivatives_6_3.F90 b/src/Derivatives_6_3.F90 index 4c8643a..0e1b024 100644 --- a/src/Derivatives_6_3.F90 +++ b/src/Derivatives_6_3.F90 @@ -60,6 +60,8 @@ subroutine deriv_gf_6_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) idel = 1.0_wp / delta + if (gsize < 3) call CCTK_WARN (0, "not enough ghostzones") + direction: select case (dir) case (0) direction if ( bb(1) == 0 ) then @@ -113,6 +115,7 @@ subroutine deriv_gf_6_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(9,6) * var(ni-8,:,:) ) * idel ir = ni - 6 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,:,:) - & @@ -174,6 +177,7 @@ subroutine deriv_gf_6_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(9,6) * var(:,nj-8,:) ) * idel jr = nj - 6 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,:) - & @@ -236,6 +240,7 @@ subroutine deriv_gf_6_3 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(9,6) * var(:,:,nk-8) ) * idel kr = nk - 6 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) - & |