CR4_TSD
:: "i" (~CR4_TSD), "i" (CR4_PCE) : "rax");
:: "i" (~CR4_TSD) : "rax");
{ CR4_TSD, "TSD ", "tsd "},
lcr4(rcr4() | CR4_TSD);
:: "i" (~CR4_TSD), "i" (CR4_PCE) : "eax");
:: "i" (~CR4_TSD) : "eax");