.text _start: movl %cr8, %eax movl %cr8, %edi movl %eax, %cr8 movl %edi, %cr8 .att_syntax noprefix movl cr8, eax movl cr8, edi movl eax, cr8 movl edi, cr8 .intel_syntax noprefix mov eax, cr8 mov edi, cr8 mov cr8, eax mov cr8, edi