defm TZMSK : tbm_binary_intr<0x01, "tzmsk", MRM4r, MRM4m>;
} // HasTBM, EFLAGS
+//===----------------------------------------------------------------------===//
+// MONITORX/MWAITX Instructions
+//
+let SchedRW = [WriteSystem] in {
+let Uses = [EAX, ECX, EDX] in
+def MONITORXrrr : I<0x01, MRM_FA, (outs), (ins), "monitorx", [],
+ IIC_SSE_MONITOR>, TB;
+let Uses = [ECX, EAX, EBX] in
+def MWAITXrr : I<0x01, MRM_FB, (outs), (ins), "mwaitx", [], IIC_SSE_MWAIT>,
+ TB;
+} // SchedRW
+
+def : InstAlias<"mwaitx\t{%eax, %ecx, %ebx|ebx, ecx, eax}", (MWAITXrr)>, Requires<[Not64BitMode]>;
+def : InstAlias<"mwaitx\t{%rax, %rcx, %rbx|rbx, rcx, rax}", (MWAITXrr)>, Requires<[In64BitMode]>;
+
+def : InstAlias<"monitorx\t{%eax, %ecx, %edx|edx, ecx, eax}", (MONITORXrrr)>,
+ Requires<[Not64BitMode]>;
+def : InstAlias<"monitorx\t{%rax, %rcx, %rdx|rdx, rcx, rax}", (MONITORXrrr)>,
+ Requires<[In64BitMode]>;
+
+//===----------------------------------------------------------------------===//
+// CLZERO Instruction
+//
+let Uses = [EAX] in
+def CLZEROr : I<0x01, MRM_FC, (outs), (ins), "clzero", []>, TB;
+
//===----------------------------------------------------------------------===//
// Pattern fragments to auto generate TBM instructions.
//===----------------------------------------------------------------------===//