diff --git a/lib/Target/X86/X86InstrMMX.td b/lib/Target/X86/X86InstrMMX.td
index 050ee395ba1..16e5a808132 100644
--- a/lib/Target/X86/X86InstrMMX.td
+++ b/lib/Target/X86/X86InstrMMX.td
@@ -254,6 +254,11 @@ let neverHasSideEffects = 1 in
 def MMX_MOVQ64rr : MMXI<0x6F, MRMSrcReg, (outs VR64:$dst), (ins VR64:$src),
                         "movq\t{$src, $dst|$dst, $src}", [],
                         IIC_MMX_MOVQ_RR>;
+let isCodeGenOnly = 1, ForceDisassemble = 1, hasSideEffects = 0 in {
+def MMX_MOVQ64rr_REV : MMXI<0x7F, MRMDestReg, (outs VR64:$dst), (ins VR64:$src),
+                        "movq\t{$src, $dst|$dst, $src}", [],
+                        IIC_MMX_MOVQ_RR>;
+}
 } // SchedRW
 
 let SchedRW = [WriteLoad] in {
diff --git a/test/MC/Disassembler/X86/x86-32.txt b/test/MC/Disassembler/X86/x86-32.txt
index a4a0b2cf9f0..c9c508680c5 100644
--- a/test/MC/Disassembler/X86/x86-32.txt
+++ b/test/MC/Disassembler/X86/x86-32.txt
@@ -708,3 +708,6 @@
 
 # CHECK: movl $4294967295, %eax
 0xc7 0xc0 0xff 0xff 0xff 0xff
+
+# CHECK: movq %mm0, %mm1
+0x0f 0x7f 0xc1