1343 …PetscBool        hasE = PETSC_FALSE, dirk = (PetscBool)(!tab->additive), stageok, accept = PETSC_T…  in TSStep_ARKIMEX()  local
1353   if (!dirk) PetscCall(TSHasRHSFunction(ts, &hasE));  in TSStep_ARKIMEX()
1354   if (!hasE) dirk = PETSC_TRUE;  in TSStep_ARKIMEX()
1357 …  if (dirk || ts->equation_type >= TS_EQ_IMPLICIT) { /* Save the initial slope for the next step */  in TSStep_ARKIMEX()
1379   if (dirk && tab->explicit_first_stage && (ts->steprestart || ts->stepresize)) {  in TSStep_ARKIMEX()
1394 …if (!dirk && ts->equation_type >= TS_EQ_IMPLICIT && tab->explicit_first_stage && ts->steprestart) {  in TSStep_ARKIMEX()
1482       if (dirk || ts->equation_type >= TS_EQ_IMPLICIT) {  in TSStep_ARKIMEX()
2068   PetscBool   dirk;  in TSSetFromOptions_ARKIMEX()  local
2071   PetscCall(PetscObjectTypeCompare((PetscObject)ts, TSDIRK, &dirk));  in TSSetFromOptions_ARKIMEX()
2072 …PetscOptionsHeadBegin(PetscOptionsObject, dirk ? "DIRK ODE solver options" : "ARKIMEX ODE solver o…  in TSSetFromOptions_ARKIMEX()
2079       if (!dirk && link->tab.additive) count++;  in TSSetFromOptions_ARKIMEX()
2080       if (dirk && !link->tab.additive) count++;  in TSSetFromOptions_ARKIMEX()
2084       if (!dirk && link->tab.additive) namelist[count++] = link->tab.name;  in TSSetFromOptions_ARKIMEX()
2085       if (dirk && !link->tab.additive) namelist[count++] = link->tab.name;  in TSSetFromOptions_ARKIMEX()
2087     if (dirk) {  in TSSetFromOptions_ARKIMEX()
2117   PetscBool   isascii, dirk;  in TSView_ARKIMEX()  local
2120   PetscCall(PetscObjectTypeCompare((PetscObject)ts, TSDIRK, &dirk));  in TSView_ARKIMEX()
2131     PetscCall(PetscViewerASCIIPrintf(viewer, "  %s %s\n", dirk ? "DIRK" : "ARK IMEX", arktype));  in TSView_ARKIMEX()
2133 …PetscCall(PetscViewerASCIIPrintf(viewer, "  %sabscissa       ct = %s\n", dirk ? "" : "Stiff ", buf…  in TSView_ARKIMEX()
2136       PetscCall(PetscViewerASCIIPrintf(viewer, "  %sAt =\n", dirk ? "" : "Stiff "));  in TSView_ARKIMEX()
2142       PetscCall(PetscViewerASCIIPrintf(viewer, "  %sbt = %s\n", dirk ? "" : "Stiff ", buf));  in TSView_ARKIMEX()
2144       PetscCall(PetscViewerASCIIPrintf(viewer, "  %sbet = %s\n", dirk ? "" : "Stiff ", buf));  in TSView_ARKIMEX()
2150     if (!dirk) {  in TSView_ARKIMEX()
2378   PetscBool   dirk;  in TSCreate_ARKIMEX()  local
2382   PetscCall(PetscObjectTypeCompare((PetscObject)ts, TSDIRK, &dirk));  in TSCreate_ARKIMEX()
2404   ark->imex = dirk ? PETSC_FALSE : PETSC_TRUE;  in TSCreate_ARKIMEX()
2412   if (!dirk) {  in TSCreate_ARKIMEX()