Minor decoder optimizations, kernel fixes, cpu backend fixes

src/xenia/cpu/ppc/ppc_instr.h

@@ -21,13 +21,7 @@ namespace xe {
 namespace cpu {
 namespace ppc {
 
-// DEPRECATED
-// TODO(benvanik): move code to PPCDecodeData.
-struct InstrData {
-  PPCOpcode opcode;
-  const PPCOpcodeInfo* opcode_info;
-  uint32_t address;
-
+struct PPCOpcodeBits {
   union {
     uint32_t code;
 
@@ -329,6 +323,14 @@ struct InstrData {
   };
 };
 
+// DEPRECATED
+// TODO(benvanik): move code to PPCDecodeData.
+struct InstrData : public PPCOpcodeBits {
+  PPCOpcode opcode;
+  const PPCOpcodeInfo* opcode_info;
+  uint32_t address;
+};
+
 }  // namespace ppc
 }  // namespace cpu
 }  // namespace xe