testbit
while (!testbit(statesmask, g->gcstate))
#define isfinalized(x) testbit(gch(x)->marked, FINALIZEDBIT)
lua_assert(testbit(gch(curr)->marked, SEPARATED));
if (testbit(gch(o)->marked, SEPARATED) || /* obj. is already separated... */
#define isblack(x) testbit((x)->gch.marked, BLACKBIT)
#define isold(x) testbit((x)->gch.marked, OLDBIT)
uint64_t testbit = 1UL << shift;
if ((testbit & xsave_bv_all) == 0)
cpuid_get_xsave_info(testbit, &size, &offset);