46   if (ark->is_slow) PetscCall(VecISCopy(Y, ark->is_fast, SCATTER_FORWARD, X));  in SNESTSFormFunction_ARKIMEX_FastSlowSplit()
67   if (ark->is_slow) PetscCall(VecISCopy(Y, ark->is_fast, SCATTER_FORWARD, X));  in SNESTSFormJacobian_ARKIMEX_FastSlowSplit()
142   if (ark->is_fast) PetscCall(TSHasRHSFunction(ark->subts_fast, &fasthasE));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
152       if (ark->is_fast) {  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
153         PetscCall(VecGetSubVector(X, ark->is_fast, &Xfast));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
157         PetscCall(VecRestoreSubVector(X, ark->is_fast, &Xfast));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
172       if (ark->is_fast) {  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
173         PetscCall(VecGetSubVector(X, ark->is_fast, &Xfast));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
177         PetscCall(VecRestoreSubVector(X, ark->is_fast, &Xfast));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
187       if (ark->is_fast) {  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
188         PetscCall(VecGetSubVector(X, ark->is_fast, &Xfast));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
192         PetscCall(VecRestoreSubVector(X, ark->is_fast, &Xfast));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
231   if (ark->is_fast) PetscCall(TSHasRHSFunction(ark->subts_fast, &fasthasE));  in TSStep_ARKIMEX_FastSlowSplit()
233     PetscCall(VecGetSubVector(ts->vec_sol, ark->is_fast, &Xfast));  in TSStep_ARKIMEX_FastSlowSplit()
237     PetscCall(VecRestoreSubVector(ts->vec_sol, ark->is_fast, &Xfast));  in TSStep_ARKIMEX_FastSlowSplit()
239     PetscCall(VecRestoreSubVector(ts->vec_sol, ark->is_fast, &Xslow));  in TSStep_ARKIMEX_FastSlowSplit()
248         PetscCall(VecISCopy(Y[i], ark->is_fast, SCATTER_REVERSE, ark->Y_prev[i]));  in TSStep_ARKIMEX_FastSlowSplit()
297       if (ark->is_fast) {  in TSStep_ARKIMEX_FastSlowSplit()
300           PetscCall(VecGetSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
307           PetscCall(VecRestoreSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
311           PetscCall(VecISCopy(ts->vec_sol, ark->is_fast, SCATTER_REVERSE, Z));  in TSStep_ARKIMEX_FastSlowSplit()
321           PetscCall(VecGetSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
327 …        PetscCall(VecISCopy(i > 0 ? Y[i - 1] : ts->vec_sol, ark->is_fast, SCATTER_REVERSE, Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
330           PetscCall(VecRestoreSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
351             PetscCall(VecGetSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
353             PetscCall(VecRestoreSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
361             PetscCall(VecGetSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
363             PetscCall(VecRestoreSubVector(Y[i], ark->is_fast, &Yfast));  in TSStep_ARKIMEX_FastSlowSplit()
417   PetscCall(TSRHSSplitGetIS(ts, "fast", &ark->is_fast));  in TSSetUp_ARKIMEX_FastSlowSplit()
418 …PetscCheck(ark->is_slow || ark->is_fast, PetscObjectComm((PetscObject)ts), PETSC_ERR_USER, "Must s…  in TSSetUp_ARKIMEX_FastSlowSplit()
430 …if (ark->is_fast && ark->is_slow) PetscCall(VecDuplicate(ts->vec_sol, &ark->Y_snes)); // need an a…  in TSSetUp_ARKIMEX_FastSlowSplit()
431   if (ark->is_fast) {  in TSSetUp_ARKIMEX_FastSlowSplit()
432     PetscCall(VecGetSubVector(ts->vec_sol, ark->is_fast, &Xfast));  in TSSetUp_ARKIMEX_FastSlowSplit()
443     PetscCall(VecRestoreSubVector(ts->vec_sol, ark->is_fast, &Xfast));  in TSSetUp_ARKIMEX_FastSlowSplit()
476     if (ark->is_fast && ark->is_slow) PetscCall(VecDestroy(&ark->Y_snes));  in TSReset_ARKIMEX_FastSlowSplit()