=> 0x7f578c968037 : cmp $0xfffffffffffff000,%rax 0x7f578c96803d : ja 0x7f578c96805d 0x7f578c96803f : repz retq 0x7f578c968041 : nopl 0x0(%rax) 0x7f578c968048 : test %ecx,%ecx 0x7f578c96804a : jg 0x7f578c968027 0x7f578c96804c : mov %ecx,%eax 0x7f578c96804e : neg %eax 0x7f578c968050 : and $0x7fffffff,%ecx 0x7f578c968056 : mov %esi,%ecx 0x7f578c968058 : cmovne %eax,%ecx 0x7f578c96805b : jmp 0x7f578c968027 0x7f578c96805d : mov 0x389ddc(%rip),%rdx # 0x7f578ccf1e40 0x7f578c968064 : neg %eax 0x7f578c968066 : mov %eax,%fs:(%rdx) 0x7f578c968069 : or $0xffffffffffffffff,%rax