X86Register: "xax" | "xcx" | "xdx" | "xbx" | "xsp" | "xbp" | "xsi" | "xdi" | "eax" | "ecx" | "edx" | "ebx" | "esp" | "ebp" | "esi" | "edi" | "rax" | "rcx" | "rdx" | "rbx" | "rsp" | "rbp" | "rsi" | "rdi" | "r8" | "r9" | "r10" | "r11" | "r12" | "r13" | "r14" | "r15" | "r8d" | "r9d" | "r10d" | "r11d" | "r12d" | "r13d" | "r14d" | "r15d" | "xip" | "eip" | "rip"