luaH_get
setobj2s(L, L->top - 1, luaH_get(hvalue(t), L->top - 1));
setobj2s(L, L->top, luaH_get(hvalue(t), &k));
const TValue *p = luaH_get(t, key);
LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
const TValue *res = luaH_get(h, key); /* do a primitive get */
TValue *oldval = cast(TValue *, luaH_get(h, key));