libdis_test:     0f ae 28           xrstor (%eax)
    libdis_test+0x3: 0f ae 20           xsave  (%eax)
    libdis_test+0x6: 0f 01 d0           xgetbv 
    libdis_test+0x9: 0f 01 d1           xsetbv