VCAP_IS2_CHAIN
goto_target == VCAP_IS2_CHAIN(0, 0) ||
goto_target == VCAP_IS2_CHAIN(1, 0) ||
if (goto_target == VCAP_IS2_CHAIN(0, pag))
if (chain == VCAP_IS2_CHAIN(0, pag))
return (goto_target == VCAP_IS2_CHAIN(1, pag));
if (chain == VCAP_IS2_CHAIN(1, pag))
if (chain == VCAP_IS2_CHAIN(lookup, pag))
return chain - VCAP_IS2_CHAIN(lookup, 0);