diff options
Diffstat (limited to 'src/Derivatives_8_4.F90')
| -rw-r--r-- | src/Derivatives_8_4.F90 | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/Derivatives_8_4.F90 b/src/Derivatives_8_4.F90 index 910a523..025ae27 100644 --- a/src/Derivatives_8_4.F90 +++ b/src/Derivatives_8_4.F90 @@ -167,6 +167,8 @@ subroutine deriv_gf_8_4 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) idel = 1.0_wp / delta + if (gsize < 4) call CCTK_WARN (0, "not enough ghostzones") + direction: select case (dir) case (0) direction if ( bb(1) == 0 ) then @@ -255,7 +257,7 @@ subroutine deriv_gf_8_4 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(12,8) * var(ni-11,:,:) ) * idel ir = ni - 8 end if - if (il > ir) call CCTK_WARN (0, "domain too small") + 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,:,:) - & @@ -354,7 +356,7 @@ subroutine deriv_gf_8_4 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(12,8) * var(:,nj-11,:) ) * idel jr = nj - 8 end if - if (jl > jr) call CCTK_WARN (0, "domain too small") + 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,:) - & @@ -454,7 +456,7 @@ subroutine deriv_gf_8_4 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) q(12,8) * var(:,:,nk-11) ) * idel kr = nk - 8 end if - if (kl > kr) call CCTK_WARN (0, "domain too small") + 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) - & |