diff --git a/src/arch/power/isa/bitfields.isa b/src/arch/power/isa/bitfields.isa
index 771a822583..84a3a2cfe4 100644
--- a/src/arch/power/isa/bitfields.isa
+++ b/src/arch/power/isa/bitfields.isa
@@ -37,6 +37,7 @@
 def bitfield PO            <31:26>;
 def bitfield A_XO          <5:1>;
 def bitfield DS_XO         <1:0>;
+def bitfield DX_XO         <5:1>;
 def bitfield X_XO          <10:1>;
 def bitfield XFL_XO        <10:1>;
 def bitfield XFX_XO        <10:1>;
diff --git a/src/arch/power/types.hh b/src/arch/power/types.hh
index 354da59ed0..6f5582124e 100644
--- a/src/arch/power/types.hh
+++ b/src/arch/power/types.hh
@@ -55,6 +55,9 @@ BitUnion32(ExtMachInst)
     Bitfield<15,  0> ui;
     Bitfield<15,  0> d;
     Bitfield<15,  2> ds;
+    Bitfield<15,  6> d0;
+    Bitfield<20, 16> d1;
+    Bitfield< 1,  0> d2;
 
     // Special purpose register identifier
     Bitfield<20, 11> spr;