diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index f8ebae1..bb9315e 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -403,15 +403,8 @@
     // will selectively turn on ones that can be effectively codegen'd.
     for (MVT VT : MVT::vector_valuetypes()) {
       // add/sub are legal for all supported vector VT's.
-      // This check is temporary until support for quadword add/sub is added
-      if (VT.SimpleTy != MVT::v1i128) {
-        setOperationAction(ISD::ADD , VT, Legal);
-        setOperationAction(ISD::SUB , VT, Legal);
-      }
-      else {
-        setOperationAction(ISD::ADD , VT, Expand);
-        setOperationAction(ISD::SUB , VT, Expand);
-      }
+      setOperationAction(ISD::ADD , VT, Legal);
+      setOperationAction(ISD::SUB , VT, Legal);
       
       // Vector instructions introduced in P8
       if (Subtarget.hasP8Altivec() && (VT.SimpleTy != MVT::v1i128)) {
diff --git a/llvm/lib/Target/PowerPC/PPCInstrAltivec.td b/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
index e77f75a..e27bf7f 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
@@ -1025,12 +1025,29 @@
 def VADDUDM : VXForm_1<192, (outs vrrc:$vD), (ins vrrc:$vA, vrrc:$vB),
                        "vaddudm $vD, $vA, $vB", IIC_VecGeneral,
                        [(set v2i64:$vD, (add v2i64:$vA, v2i64:$vB))]>;
+def VADDUQM : VXForm_1<256, (outs vrrc:$vD), (ins vrrc:$vA, vrrc:$vB),
+                       "vadduqm $vD, $vA, $vB", IIC_VecGeneral,
+                       [(set v1i128:$vD, (add v1i128:$vA, v1i128:$vB))]>;
 } // isCommutable
 
+// Vector Quadword Add
+def VADDEUQM : VA1a_Int_Ty<60, "vaddeuqm", int_ppc_altivec_vaddeuqm, v1i128>;
+def VADDCUQ  : VX1_Int_Ty<320, "vaddcuq", int_ppc_altivec_vaddcuq, v1i128>;
+def VADDECUQ : VA1a_Int_Ty<61, "vaddecuq", int_ppc_altivec_vaddecuq, v1i128>;
+
+// Vector Doubleword Subtract
 def VSUBUDM : VXForm_1<1216, (outs vrrc:$vD), (ins vrrc:$vA, vrrc:$vB),
                        "vsubudm $vD, $vA, $vB", IIC_VecGeneral,
                        [(set v2i64:$vD, (sub v2i64:$vA, v2i64:$vB))]>;
 
+// Vector Quadword Subtract
+def VSUBUQM : VXForm_1<1280, (outs vrrc:$vD), (ins vrrc:$vA, vrrc:$vB),
+                       "vsubuqm $vD, $vA, $vB", IIC_VecGeneral,
+                       [(set v1i128:$vD, (sub v1i128:$vA, v1i128:$vB))]>;
+def VSUBEUQM : VA1a_Int_Ty<62, "vsubeuqm", int_ppc_altivec_vsubeuqm, v1i128>;
+def VSUBCUQ  : VX1_Int_Ty<1344, "vsubcuq", int_ppc_altivec_vsubcuq, v1i128>;
+def VSUBECUQ : VA1a_Int_Ty<63, "vsubecuq", int_ppc_altivec_vsubecuq, v1i128>;
+
 // Count Leading Zeros
 def VCLZB : VXForm_2<1794, (outs vrrc:$vD), (ins vrrc:$vB),
                      "vclzb $vD, $vB", IIC_VecGeneral,