CISS_METH_PERF
if (!(sc->cfg.methods & (CISS_METH_SIMPL|CISS_METH_PERF))) {
sc->cfg.rmethod = CISS_METH_PERF | CISS_METH_SHORT_TAG;
if (!(sc->cfg.amethod & (CISS_METH_SIMPL|CISS_METH_PERF))) {
#define CISS_PERF_SUPPORTED(sc) ((sc)->cfg.methods & CISS_METH_PERF)