TULIP_PERF_CURRENT
#define tulip_curperfstats tulip_perfstats[TULIP_PERF_CURRENT]
+= (sc)->tulip_perfstats[TULIP_PERF_CURRENT].member; \
= (sc)->tulip_perfstats[TULIP_PERF_CURRENT].member; \
(sc)->tulip_perfstats[TULIP_PERF_CURRENT].member = 0; } while (0)