diff options
Diffstat (limited to 'src/Derivatives_8_4.F90')
| -rw-r--r-- | src/Derivatives_8_4.F90 | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/Derivatives_8_4.F90 b/src/Derivatives_8_4.F90 index 3d7e477..910a523 100644 --- a/src/Derivatives_8_4.F90 +++ b/src/Derivatives_8_4.F90 @@ -24,7 +24,7 @@ subroutine deriv_gf_8_4 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar ) CCTK_REAL, parameter :: x1 = 0.541_wp, x2 = -0.0675_wp, x3 = 0.748_wp CCTK_REAL :: idel - CCTK_INT :: il, ir, jl, jr, kl, kr, j, k + CCTK_INT :: il, ir, jl, jr, kl, kr logical, save :: first = .true. @@ -255,6 +255,7 @@ 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") dvar(il:ir,:,:) = ( a(1) * ( var(il+1:ir+1,:,:) - & var(il-1:ir-1,:,:) ) + & a(2) * ( var(il+2:ir+2,:,:) - & @@ -353,6 +354,7 @@ 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") dvar(:,jl:jr,:) = ( a(1) * ( var(:,jl+1:jr+1,:) - & var(:,jl-1:jr-1,:) ) + & a(2) * ( var(:,jl+2:jr+2,:) - & @@ -452,6 +454,7 @@ 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") dvar(:,:,kl:kr) = ( a(1) * ( var(:,:,kl+1:kr+1) - & var(:,:,kl-1:kr-1) ) + & a(2) * ( var(:,:,kl+2:kr+2) - & |