egs: add higher-order finite difference operators

1 files changed, 2 insertions, 0 deletions

diff --git a/mg2d.c b/mg2d.c
index 103f514..fe98c73 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -860,6 +860,8 @@ static int mg_levels_init(MG2DContext *ctx)
             switch (ctx->fd_stencil) {
             case 1: op_interp = GRID_TRANSFER_LAGRANGE_3; break;
             case 2: op_interp = GRID_TRANSFER_LAGRANGE_5; break;
+            case 3: op_interp = GRID_TRANSFER_LAGRANGE_7; break;
+            case 4: op_interp = GRID_TRANSFER_LAGRANGE_7; break;
             default: return -ENOSYS;
             }