diff --git a/llvm/lib/Target/PowerPC/PPCInstrPrefix.td b/llvm/lib/Target/PowerPC/PPCInstrPrefix.td
--- a/llvm/lib/Target/PowerPC/PPCInstrPrefix.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrPrefix.td
@@ -905,6 +905,38 @@
               [(set v2i64:$vD,
                     (int_ppc_altivec_vinsdrx v2i64:$vDi, i64:$rA, i64:$rB))]>,
               RegConstraint<"$vDi = $vD">, NoEncode<"$vDi">;
+  def VEXTDUBVLX : VAForm_1a<24, (outs vrrc:$vD),
+                             (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                             "vextdubvlx $vD, $vA, $vB, $rC",
+                             IIC_VecGeneral, []>;
+  def VEXTDUBVRX : VAForm_1a<25, (outs vrrc:$vD),
+                             (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                             "vextdubvrx $vD, $vA, $vB, $rC",
+                             IIC_VecGeneral, []>;
+  def VEXTDUHVLX : VAForm_1a<26, (outs vrrc:$vD),
+                             (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                             "vextduhvlx $vD, $vA, $vB, $rC",
+                             IIC_VecGeneral, []>;
+  def VEXTDUHVRX : VAForm_1a<27, (outs vrrc:$vD),
+                             (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                             "vextduhvrx $vD, $vA, $vB, $rC",
+                             IIC_VecGeneral, []>;
+  def VEXTDUWVLX : VAForm_1a<28, (outs vrrc:$vD),
+                             (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                             "vextduwvlx $vD, $vA, $vB, $rC",
+                             IIC_VecGeneral, []>;
+  def VEXTDUWVRX : VAForm_1a<29, (outs vrrc:$vD),
+                             (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                             "vextduwvrx $vD, $vA, $vB, $rC",
+                             IIC_VecGeneral, []>;
+  def VEXTDDVLX : VAForm_1a<30, (outs vrrc:$vD),
+                            (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                            "vextddvlx $vD, $vA, $vB, $rC",
+                            IIC_VecGeneral, []>;
+  def VEXTDDVRX : VAForm_1a<31, (outs vrrc:$vD),
+                            (ins vrrc:$vA, vrrc:$vB, g8rc:$rC),
+                            "vextddvrx $vD, $vA, $vB, $rC",
+                            IIC_VecGeneral, []>;
    def VPDEPD : VXForm_1<1485, (outs vrrc:$vD), (ins vrrc:$vA, vrrc:$vB),
                          "vpdepd $vD, $vA, $vB", IIC_VecGeneral,
                          [(set v2i64:$vD,
diff --git a/llvm/test/MC/Disassembler/PowerPC/ppc64-encoding-ISA31.txt b/llvm/test/MC/Disassembler/PowerPC/ppc64-encoding-ISA31.txt
--- a/llvm/test/MC/Disassembler/PowerPC/ppc64-encoding-ISA31.txt
+++ b/llvm/test/MC/Disassembler/PowerPC/ppc64-encoding-ISA31.txt
@@ -330,6 +330,30 @@
 # CHECK: vinsdrx 1, 2, 3
 0x10 0x22 0x1b 0xcf
 
+# CHECK: vextdubvlx 1, 2, 3, 3
+0x10 0x22 0x18 0xd8
+
+# CHECK: vextdubvrx 1, 2, 3, 3
+0x10 0x22 0x18 0xd9
+
+# CHECK: vextduhvlx 1, 2, 3, 3
+0x10 0x22 0x18 0xda
+
+# CHECK: vextduhvrx 1, 2, 3, 3
+0x10 0x22 0x18 0xdb
+
+# CHECK: vextduwvlx 1, 2, 3, 3
+0x10 0x22 0x18 0xdc
+
+# CHECK: vextduwvrx 1, 2, 3, 3
+0x10 0x22 0x18 0xdd
+
+# CHECK: vextddvlx 1, 2, 3, 3
+0x10 0x22 0x18 0xde
+
+# CHECK: vextddvrx 1, 2, 3, 3
+0x10 0x22 0x18 0xdf
+
 # CHECK: lxvrbx 32, 1, 2
 0x7c 0x01 0x10 0x1b
 
diff --git a/llvm/test/MC/PowerPC/ppc64-encoding-ISA31.s b/llvm/test/MC/PowerPC/ppc64-encoding-ISA31.s
--- a/llvm/test/MC/PowerPC/ppc64-encoding-ISA31.s
+++ b/llvm/test/MC/PowerPC/ppc64-encoding-ISA31.s
@@ -456,6 +456,30 @@
 # CHECK-BE: vinsdrx 1, 2, 3                       # encoding: [0x10,0x22,0x1b,0xcf]
 # CHECK-LE: vinsdrx 1, 2, 3                       # encoding: [0xcf,0x1b,0x22,0x10]
             vinsdrx 1, 2, 3
+# CHECK-BE: vextdubvlx 1, 2, 3, 3                 # encoding: [0x10,0x22,0x18,0xd8]
+# CHECK-LE: vextdubvlx 1, 2, 3, 3                 # encoding: [0xd8,0x18,0x22,0x10]
+            vextdubvlx 1, 2, 3, 3
+# CHECK-BE: vextdubvrx 1, 2, 3, 3                 # encoding: [0x10,0x22,0x18,0xd9]
+# CHECK-LE: vextdubvrx 1, 2, 3, 3                 # encoding: [0xd9,0x18,0x22,0x10]
+            vextdubvrx 1, 2, 3, 3
+# CHECK-BE: vextduhvlx 1, 2, 3, 3                 # encoding: [0x10,0x22,0x18,0xda]
+# CHECK-LE: vextduhvlx 1, 2, 3, 3                 # encoding: [0xda,0x18,0x22,0x10]
+            vextduhvlx 1, 2, 3, 3
+# CHECK-BE: vextduhvrx 1, 2, 3, 3                 # encoding: [0x10,0x22,0x18,0xdb]
+# CHECK-LE: vextduhvrx 1, 2, 3, 3                 # encoding: [0xdb,0x18,0x22,0x10]
+            vextduhvrx 1, 2, 3, 3
+# CHECK-BE: vextduwvlx 1, 2, 3, 3                 # encoding: [0x10,0x22,0x18,0xdc]
+# CHECK-LE: vextduwvlx 1, 2, 3, 3                 # encoding: [0xdc,0x18,0x22,0x10]
+            vextduwvlx 1, 2, 3, 3
+# CHECK-BE: vextduwvrx 1, 2, 3, 3                 # encoding: [0x10,0x22,0x18,0xdd]
+# CHECK-LE: vextduwvrx 1, 2, 3, 3                 # encoding: [0xdd,0x18,0x22,0x10]
+            vextduwvrx 1, 2, 3, 3
+# CHECK-BE: vextddvlx 1, 2, 3, 3                  # encoding: [0x10,0x22,0x18,0xde]
+# CHECK-LE: vextddvlx 1, 2, 3, 3                  # encoding: [0xde,0x18,0x22,0x10]
+            vextddvlx 1, 2, 3, 3
+# CHECK-BE: vextddvrx 1, 2, 3, 3                  # encoding: [0x10,0x22,0x18,0xdf]
+# CHECK-LE: vextddvrx 1, 2, 3, 3                  # encoding: [0xdf,0x18,0x22,0x10]
+            vextddvrx 1, 2, 3, 3
 # CHECK-BE: lxvrbx 32, 1, 2                       # encoding: [0x7c,0x01,0x10,0x1b]
 # CHECK-LE: lxvrbx 32, 1, 2                       # encoding: [0x1b,0x10,0x01,0x7c]
             lxvrbx 32, 1, 2