224 static PetscErrorCode MatMult_Mass(Mat A, Vec X, Vec Y) {  in MatMult_Mass()  argument
252   if (Y) {  in MatMult_Mass()
253     PetscCall(VecZeroEntries(Y));  in MatMult_Mass()
254 …PetscCall(VecScatterBegin(op_apply_ctx->l_to_g, op_apply_ctx->Y_loc, Y, ADD_VALUES, SCATTER_FORWAR…  in MatMult_Mass()
255 …PetscCall(VecScatterEnd(op_apply_ctx->l_to_g, op_apply_ctx->Y_loc, Y, ADD_VALUES, SCATTER_FORWARD)…  in MatMult_Mass()
261 static PetscErrorCode MatMult_Diff(Mat A, Vec X, Vec Y) {  in MatMult_Diff()  argument
289   PetscCall(VecZeroEntries(Y));  in MatMult_Diff()
290   PetscCall(VecScatterBegin(op_apply_ctx->g_to_g_D, X, Y, INSERT_VALUES, SCATTER_FORWARD));  in MatMult_Diff()
291   PetscCall(VecScatterEnd(op_apply_ctx->g_to_g_D, X, Y, INSERT_VALUES, SCATTER_FORWARD));  in MatMult_Diff()
292 …PetscCall(VecScatterBegin(op_apply_ctx->l_to_g_0, op_apply_ctx->Y_loc, Y, ADD_VALUES, SCATTER_FORW…  in MatMult_Diff()
293 …PetscCall(VecScatterEnd(op_apply_ctx->l_to_g_0, op_apply_ctx->Y_loc, Y, ADD_VALUES, SCATTER_FORWAR…  in MatMult_Diff()