1 libdis_test: 66 0f ae 30 clwb (%eax) 2 libdis_test+0x4: 0f ae 3b clflush (%ebx) 3 libdis_test+0x7: 66 0f ae 39 clflushopt (%ecx) 4 libdis_test+0xb: 0f 01 fc clzero 5