Function xed_sys::xed_modify_chip_features

pub unsafe extern "C" fn xed_modify_chip_features(
    p: *mut xed_chip_features_t, 
    isa_set: xed_isa_set_enum_t, 
    present: xed_bool_t
)

present = 1 to turn the feature on. present=0 to remove the feature.