supports_function
if (supports_function(sc, DSM_INTEL, DSM_GET_DEVICE_CONSTRAINTS)) {
if (supports_function(sc, DSM_AMD, DSM_GET_DEVICE_CONSTRAINTS))
} else if (supports_function(sc, DSM_AMD, DSM_GET_DEVICE_CONSTRAINTS))
if (!(supports_function(sc, dsm->index, function_index) ||