// AMD extensions.
syscall, 0, 0xf05, None, 2, CpuSYSCALL, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }
-sysret, 0, 0xf07, None, 2, CpuSYSCALL, DefaultSize|No_bSuf|No_wSuf|No_sSuf|No_ldSuf, { 0 }
+sysret, 0, 0xf07, None, 2, CpuSYSCALL, No_bSuf|No_wSuf|No_sSuf|No_ldSuf, { 0 }
swapgs, 0, 0xf01f8, None, 3, Cpu64, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }
rdtscp, 0, 0xf01f9, None, 3, CpuRdtscp, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }