diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 36ae14585bc..664b06170e9 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -840,6 +840,13 @@ def PADDDrm : PDI<0xFE, MRMSrcMem, (ops VR128:$dst, VR128:$src1, f128mem:$src2),
                                         (load addr:$src2))))]>;
 }
 
+//===----------------------------------------------------------------------===//
+// Miscellaneous Instructions
+//===----------------------------------------------------------------------===//
+
+def LDMXCSR : I<0xAE, MRM2m, (ops i32mem:$src),
+                "ldmxcsr {$src|$src}", []>, TB, Requires<[HasSSE1]>;
+
 //===----------------------------------------------------------------------===//
 // Alias Instructions
 //===----------------------------------------------------------------------===//